Cucumber beetle larvae
The larvae range from 1/10 to 1/3 inch and are off-white, cream colored or pale yellow with dark brown heads and anal plates. Larvae: Yellowish-white, wrinkled grubs with brown head and three pairs of brown legs. Eaton, Extension Specialist, Entomology Introduction The striped cucumber beetle, Acalymma vittatum, is one of the most devastating pests of cucurbits (cucumbers, summer and winter squashes, all types of melons and pumpkins) east of the Rocky Mountains. Damage from cucumber beetles begins in spring with feeding by adults on the stems, cotyledons and emerging leaves of young cucurbit plants. Adult cucumber beetlesare chewing insects that eat holes in leavesand cause window-paning ofleaves of cucumber, squash, watermelon, and other vine crops. Predator Insects. Adult spotted cucumber beetles overwinter in on piles of trash, compost or garden debris. Adult cucumber beetles eat holes in the leaves, flowers, and stems, and chew on the fruit skin. The spotted cucumber beetle resembles in shape the ladybug but, unlike the ladybug, is not beneficial to the garden. The larvae are white grubs with brownish heads. They are found below ground feeding on plant crowns and roots. Vector for bacterial wilt disease (Erwinia tracheiphila) in most cucurbits and squash and cucumber mosaic virus (and others). Cucumber Beetle Biology.
How To Control Cucumber Beetles Get rid of adult cucumber beetles with Liquid Rotenone/Pyrethrin Mix the powder with water as Beneficial Nematodes will get rid of cucumber beetle larvae. trivittatum) is more common west of the Mississippi River. They then hibernate in the soil or among fallen leaves until spring. The southern US with its warmer temperatures and longer growing season supports up to three generations of cucumber beetles each year. Lure was developed from research done at Oregon State University. While the adults feed mainly on foliage, pollen and flowers, their feeding on melon rinds late in the season may reduce market quality. They are a small investment, but row covers can be re-used from year to year. Another option for controlling beetle infestations is Hands-on Removal and Plant Maintenance. The adults can be found on cucurbits such as cucumbers and a variety of other plants. Cucumber beetle larvae feed on plant roots, and the beetles transmit cucumber bacterial wilt, which overwinters in their intestines. Cucumber worms can grow up to 3/4 inches long. Place trap at crop height when beetles start to appear.
If your cukes aren’t large to sustain them, the adult beetles survive on weeds. However, depending on the variety, the following plants may be impacted: Cucumber, cantaloupe, squash, gourd, pumpkin, corn, soybean, cotton, beans, potato, grape, sweet potato, Larvae of the spotted cucumber beetle feed on the roots of corn, small grains, beans, sweet pea, and several grasses but do not usually cause noticeable damage in gardens. The Spotted Cucumber Beetle is also 1/4" long,. The larvae of all three, however, consume roots and tunnel through underground stems. Larvae of both cucumber beetle species feed on the roots of various plantsbut do not causeserious damage. The Striped Cucumber Beetle (SCB), Acalymma vittattum (Fab. than striped cucumber beetles (although there is some evidence that some may overwinter in northern areas, too). The larvae are beige with a brown head and brown spot on the last segment. Remove weeds to reduce hiding places for the insects and hand pick beetles from plants, dropping them into a bucket of soapy water. The spotted cucumber beetle is also called the southern corn rootworm because its larval stage is a major pest in commercial corn fields. Larvae will hatch from the eggs and eat the plants’ roots. are characterized by a white thorax and abdomen and a dark head capsule.
Beetles lay their eggs in the ground near the base of the plant on which they feed. Protect Cucumber Plants From Beetles. Pupa: Pupation occurs in the soil, and typically lasts four to six days. Larvae feed on roots of squash family plants only, killing or stunting plants. Larvae of the striped cucumber beetle, Acalymma vittatum F. The spotted cucumber beetle is pale green with a black head and legs, and has 12 black dots on its back, arranged in three rows. Banded Cucumber Beetles – Mostly a tropical species, the banded cucumber beetle is prominent in southern parts of Florida, Texas and Arizona. In Connecticut, beetle infestations generally tend to peak about the third week of June. The cucumber beetle is known to vector viral diseases in beans; however, damage caused by larvae and adults can increase the incidence and severity of Fusarium and other fungal diseases. Larva of banded cucumber beetle, Diabrotica balteata LeConte. Striped cucumber beetles have stripes instead of spots and are smaller. There are two to three generations of cucumber beetles each year.
In some cases, natural sprays are preferred by home gardeners as they may be wary of spraying their vegetables with a chemical insecticide. Striped cucumber beetles are yellow-green with three black stripes down the back and are 1/4 inch long. Mexican bean beetles (Epilachna varivestis) When it comes to vegetable garden pests, one of the most common is the Mexican bean beetle. The spotted cucumber beetle feeds on an even wider array of cultivated plants, adding potatoes, beets, tomatoes, eggplants, and cabbage to its menu. Note: Adult and larval stages of the cucumber beetle transmit several plant diseases, including bacterial wilt and mosaic virus in cucurbits. The larvae do just as much harm to vegetables as the adults, and they can even transmit diseases and viruses that can damage crops! Fortunately, this Sure-Catch™ Cucumber Beetle Trap makes certain that those pesky beetles are no longer a problem. Their eggs are yellow, oval and laid at the base of plants. Besides causing direct feeding damage on foliage and fruit, SCB also vectors the bacterial wilt pathogen, Erwinia tracheiphila. Fact Sheets - Striped Cucumber Beetles. Striped cucumber beetle (SCB), Acalymma vittatum, is an economic pest of cucurbits in the Midwest. The yellowish-green adult spotted cucumber beetle (Diabrotica undecimpunctata howardi) has 11 black spots and a black head with black antennae. Vegetable crops damaged by the cucumber beetle include cucumber, squash, beet, bean, pea, sweet potato, okra, corn, lettuce, onion, and various cabbages.
Adults of the two species are easy to tell apart: the In spring, spotted cucumber beetle prefers to deposit eggs in wet, coarse soil. Some of them are: Spotted Cucumber Beetle larva are also known as Southern Corn Rootworm. These beetles also spread bacterial wilt, cucumber mosaic, and squash mosaic virus. Ladybugs have short antennae while the cucumber beetle has very long string-like antennae. The larvae can cause severe damage to roots. Striped cucumber beetles are specialists on cucurbits (such as cucumbers, squash, pumpkin, watermelons) while spotted cucumber beetles feed on other plants in Larvae of these insects feed on roots and stems, but this damage is minimal compared to the potential losses due to bacterial wilt. Both adults and larvae feed on cucurbit crops. Cucumber beetle larvae are thin white grubs with brown head capsules. Larvae feed on roots and stems and can stunt or kill seedlings or transplants. Both adults and larvae feed on Striped Cucumber Beetles. The slightly larger Western striped cucumber beetle (A. Striped cucumber beetles have black abdomens, while the abdomens of western corn rootworms are yellow-green.
Cucumber beetles lay yellow-orange eggs in the soil at the base of plants. After hatching, they bore underground and attack the roots of the plant. During this time female beetles begin laying groups of oval, orange-yellow eggs in the soil near the base of plants. The striped cucumber beetle has a more specific host range and feeds almost exclusively on cucurbits in the adult stage. In northern areas there is one generation per year. How To Control Cucumber Beetles. The fastidious gardener can also choose to remove beetles by Western striped cucumber beetle larvae feed exclusively on cucurbit roots, whereas western spotted cucumber beetle larvae feed on a wide variety of plants including grasses, corn, legumes, and cucurbits. Buss, University of Florida. Other than the obvious cucumbers which they’re named after, cucumber beetles tend to be fond of cucurbits and corn as their primary crops. The eggs fall prey to lacewings and ladybugs. Cucumber beetle larvae (immature forms) feed on the roots and bore into both roots and stems of cucumber plants. Striped cucumber beetles lay their eggs at the base of the plants- which means that the roots suffer the most damage from the larva.
In a few days, the female lays eggs in the soil. Spotted cucumber beetles (Diabrotica undecimpunctata) are yellow-green with 12 black spots on their backs. Cucumber Beetle Damage. Spotted and banded cucumber beetles attack and deposit eggs on more than 200 different plants. They are evasive and hard to catch/kill, as they fly off quickly. This cucumber beetle is primarily found in North America, specifically the central and eastern portions of the United States. Get rid of adult cucumber beetles with Liquid Rotenone/Pyrethrin Mix the powder with water as directed on the label and completely cover the plants with a coarse spray. Once the eggs hatch, the larvae immediately begin feeding on A Non-Toxic Way to Trap Cucumber Beetles Both the larvae and adults can do substantial damage to vegetable crops, especially cucumber, cantaloupe, pumpkin and watermelon. Both types will feed on the plants causing stunted growth, less fruit, and disease like bacterial wilt. These traps only work on the adults; they do not kill the larvae. No. They emerge in spring to mate and deposit their orange-yellow eggs on a host of plants.
The spotted cucumber beetle, however, is not considered as serious a problem as the striped cucumber beetle. Origin and Distribution. The adult striped cucumber beetle feeds almost exclusively on cucurbits, including cucumber, cantaloupe, winter squash, pumpkin, gourd, summer squash, and watermelon. These are the striped cucumber beetle (Aclymma vittatum in the eastern U. They can transmit bacterial wilt and mosaic viruses. Cucumber beetle larvae are often called corn rootworms and can decimate a young corn crop. Adult beetles overwinter in plant debris and garden trash. Striped cucumber beetle eggs are pale orange-yellow and are laid in groups near the base of cucurbit plants. There are two kinds of cucumber beetles: The Striped Cucumber Beetle is 1/4" long. The striped cucumber beetle is How To Control Cucumber Beetles Using IPM. When they hatch, the larvae eat the roots of your plants. The striped cucumber beetle also has a yellow body but has three black stripes along its back, Both are the same size, roughly a quarter of an inch long.
All three of these have small black heads. The larvae develop on the roots of corn, small grains and grasses. Cucumber worms, the larvae of the cucumber beetle, are yellowish-white in color with a brown head and rear, and three pairs of legs. Striped cucumber beetles are ~7 mm-long, yellow beetles with three black stripes that reach the end of the forewings, a yellow thorax, and a black head. Life cycle: Adult cucumber beetles overwinter, usually sheltering in woodlands or dense grasses. Striped cucumber beetle deposits eggs around the base of plants, on vines, or just below soil surface. Damage caused by cucumber beetles Feeding damage caused by striped cucumber beetle Feeding damage by striped cucumber beetles. Cucumbers and melons are particularly susceptible to bacterial wilt, and damage from this can be severe. Control Cucumber Beetles With Barriers Unless plants are trained to a trellis, you can easily protect them from cucumber beetles with garden fleece , also called floating row cover. Organic Control Measures for Striped Cucumber Beetles In all stages of life, these beetles do damage to cucumbers, winter and summer squash, melons, pumpkins, and gourds. This trap works by attracting adults with a pheromone lure; once they get too close, they become caught on the sticky trap and quickly perish. Adults can also vector fusarium wilt and the bacteria, Erwinia tracheiphila.
Both adults and larvae of this species feed on a variety of food plants commonly grown at home. The adults emerge in 7 to 10 days. The cucumber beetle likes to eat your cucumber’s leaves and lay eggs near the plants. Acalymma trivittatum, ‘Western Striped Cucumber Beetle’ Cucumber beetles are commonly found throughout the United States but are especially serious in the South, particularly where soils are heavy. The cucumber beetle lure has been specifically developed so that it can be used to trap multiple species of cucumber beetles. Larvae feed on cucurbit roots and underground portions of the stems. Striped Cucumber Beetle. Life Cycle. A few of the prominent pests are the spotted cucumber beetles and their larvae. The larva of the cucumber beetle is called the southern corn rootworm. The grubs chew up the roots of cucumbers, beans, melons, squash, and pumpkins. Larvae feed on roots, reducing yield.
The mature larvae pupate in the soil. You will find two different kinds of cucumber beetle – striped and spotted. . Striped beetles favor cucumbers, melons, pumpkins and other curcubits. Adults feed on the foliage, and when populations are high, they feed on the stems as well. Their preferred foods: cucumbers, beans, melons, squash, pumpkins, corn and eggplant. org. They are a difficult and devastating pest for corn farmers. Many are notorious pests of agricultural crops. The larva of the spotted cucumber beetle is also known as the southern corn rootworm. This lightweight spun-bonded fabric allows sun, air, and rain to get through while keeping out the beetles as long as the entire plant is covered. This feeding does not affect plant health.
Adults chew leaves and flowers; an adult cucumber beetle will eat the tassels, leaves, and silks of corn plants. The beetles are generally less than 1/4 inch long, but a heavy infestation can slow plant growth or kill cucumber plants. The eggs are laid in the soil close to your cucurbits. There are three species of the cucumber beetle that are found in different locations: the spotted cucumber beetle (larvae: southern corn rootworm); western cucumber beetle and the western spotted cucumber beetle. Other Methods of Control Cucumber Beetles. Adult banded cucumber beetle, Diabrotica balteata LeConte, and leaf-feeding damage caused by the adult. Banded cucumber beetle is known as a vector of virus diseases in beans, and larval feeding might increase the incidence and severity of Fusarium wilt. The adult spotted cucumber beetle is approximately the same size as the striped, however it has a yellowish-green body with 12 black spots on its wing covers. The cucumber beetle is a garden foe. Adult beetles are green with yellow stripes, have an orange head and are about ¼-inch long. Introduction. Eggs are yellow to orange in color, oval, and found in clusters of up to 50.
Preventing an Infestation. Cucumber Beetle The Cucumber Beetle is a major pest of cucumbers, soybeans, beans and corn found all over the United States. Striped cucumber beetle larvae feed mostly on roots and stems. Spotted cucumber beetles (Diabrotica undecimpunctata) overwinter in crop debris in the garden and lay eggs in the soil in spring. The yellowish-white larvae have brown heads and are ¾-inch (19 mm) long when grown. Make Your Plant Less Appealing to Beetles. Damage. Striped cucumber beetles (Acalymma vittatum) are less than a quarter inch long, with three black stripes down their wing covers. Beneficial insects can attack adults, eggs and larvae on plants or on the soil surface. Body is ¼ long, yellowish green with 12 distinct black spots on its wings. The larvae (also known as corn rootworm) hatch and feed on plant roots for 2-4 weeks. Gummy stem blight is also associated with beetle damage.
In addition to inflicting significant damage by feeding, these beetles add insult to injury by transmitting bacterial wilt along the way. Adult: Adults are 5 to 6 mm in length, greenish yellow in color with a red head and black thorax. The larvae of several cucumber beetles are known as corn rootworms. The beetles are 1/8–1/4″ long and fly away quickly when disturbed. Cucumber Beetles Spotted cucumber beetle ( Diabrotica undecimpunctata howardi) is a bright yellow-green Striped cucumber beetle ( Acalymma vittata) is pale yellow with three black stripes down Western corn rootworm ( Diabrotica virgifera virgifera) is a little bit bigger than the others. Although similar in appearance, the striped cucumber beetle and the western corn rootworm are not the same. Adult cucumber beetles overwinter in plant debris and emerge in spring after the last frost. It has a yellow-green body with three black stripes. Plant the Right Cukes The spotted cucumber beetle, however, is not considered as serious a problem as the striped cucumber beetle. Spray both sides of the plant leaves thoroughly. Up to 1/3 inch long for striped cucumber beetles, up to 2/3 inch long for spotted cucumber beetles. Beetles can kill or severely stunt seedlings and on older plants damage stems and fruits.
Cucumber beetles are a major concern to muskm elon and cuc um ber grow ers bec aus e they vec tor the bacteria that causes a disease, bacterial wilt of cucurbits. The beetle is well known for transmitting bacterial wilt, and some viruses. California Certified Organic Farmers (CCOF) approved. Pupae: The striped cucumber beetle pupates in the soil, near the base of its host plant. The female spotted cucumber beetle “only” lays 200 to 300 eggs. The striped cucumber beetle larva feeds exclusively on cucurbit roots and can damage these crops when infestations are heavy. The larvae are laid in eggs on the underside of the leaves of the affected plants. How to Control Cucumber Beetles Organically Attack the Larvae With Diatomaceous Earth. It has a yellow green body with 12 black spots. ), is one of the most devastating pests of cucurbits (cucumbers, summer and winter squashes, all types of melons and pumpkins) east of the Rocky Mountains. A single beetle can cause severe damage to an emerging plant by feeding on the lower surface of leaves. Eggs are laid in the soil at the base of cucurbit plants 10 to 20 days after adults mate, and hatch a week later.
Cucumber beetle control with insecticide starts in mid spring when the cucumber beetles emerge from their overwintering locations. Row covers eliminate the ability for beetles to ever reach plants. They are a natural and effective alternative to chemical pesticides, and have no detrimental affect on non-target species such as ladybugs, earth worms and other helpful garden insects. The adults feed on squash family plants, beans, corn, peas, and blossoms of many garden plants. Adults are known to feed inside flowers, preventing pollination and fruit set. Striped cucumber beetles lay eggs at the base of cucurbit plants and their larvae then feed on the roots of these plants. These larvas are predators and will eat the eggs of many garden pests, as well as damaging larvae and soft insect bodies. Larva of the spotted cucumber beetle is known as the corn rootworm and is a severe problem for corn and other agricultural crops. They attack cucumber plants by eating the roots and burrowing in young plant stems, which causes the plant to wilt and die. The larvae of both beetles are between 1/3" to 3/4" in length and white to yellowish-white in color. Larvae are beige with brown heads and a brown spot on the last segment. Larvae grow to ½ long.
Most of them are dangerous pests of agricultural crops. Eggs are oval and yellow. Not only will it attack your cucumbers, but it will also wreak havoc on your squash, pumpkins and melons. Cucumber Beetles. They lay orange eggs at the base plants. In North American cucurbit crops, two species of cucumber beetle present the most problems. The little beetles fly away when disturbed, The cucumber beetle is a garden foe. Treat the plants again in early summer so that you can kill some of the cucumber beetle larvae that will be emerging from the eggs at this time. Symptoms and Effects. If you have serious issues with beetles, this is the way to go. Bt (Bacillus thuringiensis) Bt applied to the soil in the early spring after the first appearance Use a Striped Cucumber Beetle Pest Fact Sheet 20 Dr. Symptoms and Effects: Cucumber beetle larvae feed on roots and stems, and can stunt or kill seedlings or transplants.
The larva of the cucumber beetle feeds on roots and stems and can cause severe damage to very small plants, but less damage to larger plants with more fully developed root systems. The larvae attack the root structure of the plants from within the soil. Soldier beetles, parasitic nematodes, Braconid wasps and Tachnid flies will prey on the adult cucumber beetle. It feeds primarily on cucurbits. Larvae take 2 to 4 weeks to mature, and then pupate over the next 7 days. In addition to corn roots, it infests peanuts, small grains and many wild grasses. Cucumber beetles not only severely defoliate plants and damage fruit, they also serve as vectors for certain viral plant diseases. Finally, there is no evidence that parasitic nematodes or their symbiotic bacteria can develop in vertebrates. A mix of 1 cup wood ash, 1 cup hydrated lime and 2 gallons of water can be used as a spray for the cucumber beetle. Both beetles have black heads. In Utah, biocontrol agents that attack cucumber beetles are soldier beetles, ground beetles, braconid wasps, tachinid flies, and entomopathogenic nematodes. Cucumber beetle is a common name given to members of two genera of beetles, Diabrotica and Acalymma, both in the family Chrysomelidae.
They are winged making it easy to fly around fron plant to plant, and very difficult to capture. If you plan on starting a vegetable garden, it's a good idea to treat early cucumber beetle activity which in turn will minimize or even eliminate those that might forage on your crops later in the year. If you find that the stems of your seedlings are being eaten off, leaves are yellowing and wilting, and holes are appearing, you may have a striped or spotted cucumber beetle problem. Target Plants: Larvae feed on roots of corn, beans and other legumes and many vegetables especially cucurbits (cucumbers, melons, and squash). The adult SCB is about 1/5 inch long, 1/10 inch wide, and has yellow wings with 3 longitudinal black stripes. If enough spotted cucumber beetle larvae infest their developing root systems, your young cukes may not live long enough to produce leaves or flowers. How to Kill Cucumber Worms. The cucumber beetle is a small, striped insect that damages cucumber plants by feeding on the tender leaves, stems and shoots, particularly in the early stages of growth. S. Larval feeding on roots increases susceptibility to Fusarium infection. What Is a Cucumber Beetle? Cucumber beetles are mostly bright yellow in color, have long antennae in the front, and are about 1/4-inch in length. Corn Rootworms – These worms are not their own species, but the larvae of spotted cucumber beetles.
The adult form prefers older plant foliage. The larvae of many cucumber beetles are called Corn Rootworms. Larvae feed on roots reducing yield. and A. The yellowish-green adult spotted cucumber beetle ( Diabrotica undecimpunctata howardi ) has 11 black spots and a black head with black antennae. Once the eggs hatch, the larvae immediately begin feeding on Cucumber beetle larvae feed on the roots and bore into both roots and stems of cucumber plants. Because of risk of bacterial wilt disease, preventing a beetle attack is your best guarantee of a successful harvest. Banded cucumber beetles are believed to have originated in tropical areas of the new world. trivittatum in the west) and the spotted cucumber beetle (Diabrotica undecimpunctata). Cucumber beetles feed on the soft leaves and stems of many vegetables in the curcubit family including cucumbers, squash, pumpkin, and melons. One trap with lure will cover a 2,000 sq ft area. Larvae of these insects feed We also may see the smaller Striped Cucumber Beetle and Green Banded Cucumber Beetle.
Though cucumber beetles prefer vine plants like cucumbers, squash and pumpkins, they'll eat what they can find early in the growing season. The larvae work their way to the plant roots where they feed for the next 2 to 6 weeks, sometimes causing severe damage. Larvae are 9 mm long, creamy white with black heads and with three pairs of short legs. Photograph by Whitney Cranshaw, Colorado State University, Bugwood. Cucumber Beetles are a major problem wherever cucumber, watermelon, pumpkin, cantaloupe, squash and other cucurbits are grown. Despite its neat appearance, the Spotted Cucumber Beetle is a bane to anyone trying to grow food. Adult cucumber beetles severely defoliate plants and scar fruit, drastically reducing their market value. Feeding from larvae and adults causes direct damage to roots, leaves, flowers, and fruits. Striped and banded beetles deposit their eggs in the soil around their feeding sites. Heavy larvae populations can reduce plant vigor and damage melon rinds making the produce unfit for consumption or market. The eggs are yellowish-orange in color. banded cucumber beetle, Diabrotica balteata The cucurbit beetle (Diabrotica speciosa) is nearly identical to a species common in the southeastern United States, the banded cucumber beetle (Diabrotica balteata).
The larvae of the banded cucumber beetle can cause extensive damage to tuber-bearing crops. The beetles hatch from the larva when the weather warms and immediately begin to seek out bright flowers such as goldenrod, The larva of the cucumber beetle is called the southern corn rootworm. Two of the spots on the back of the beetle run together, making one butterfly-shaped spot, so this insect is sometimes called a twelve-spotted cucumber beetle. Cucumber beetles are serious pests of smooth-skinned cucurbits, especially melon varieties such as honeydew, crenshaw, and casaba. The larvae are dependent on cucurbits for development; they cannot live on any other host plant. Description and Life Cycle (Back to Top) Figure 1. Figure 3. Identification: Adult Mexican bean beetles are copper-colored, ladybug-like beetles with 16 black spots (see lower right image in this post’s featured photo). The striped cucumber beetle is ⅕ long with yellow-and-blackstriped wings. The eggs hatch in about 10 days. This stops all damage, along with the ability for mature beetles to lay more larvae. Adult will eat holes in leaves and pods of host plants.
Photograph by Lyle J. Striped cucumber beetles have black abdomens while the abdomens of western corn rootworms are yellow-green. In mid-summer white larvae about ½ inch long (with a brown head and brown spot on the last segment of the body) feed on roots and soon weakens host plants. Beneficial Nematodes will get rid of cucumber beetle larvae. Natural Insecticides. Along Natural Spray for Cucumber Beetle Bugs. Kentucky. Once the eggs hatch, the larvae immediately begin feeding on plant roots. Spotted cucumber beetles (Diabrotica undecempunctata howardi) are yellow-green with 12 black spots on their backs and a black head. Spotted cucumber beetle larvae feed on roots, stem base, or fruit surface (thus the name "rindworm"). Later in the season beetles can feed on watermelon rind causing mostly cosmetic damage to the fruit, which may reduce marketability. The yellowish green adult spotted cucumber beetle has 11 black spots and a black head with black antennae.
Spray the plants weekly for two to three weeks. Here is a larva. Pupae are white, eight to 10 mm in length, with a Cucumber beetle is a common name given to members of two genera of beetles, Diabrotica and Acalymma, both in the family Chrysomelidae. Typical Damage Caused By Cucumber Beetles. The grown up ones are seen on Cucurbits like cucumbers and other types of plants. Larvae, which are white with brown heads, chew on roots. Alan T. cucumber beetle larvae
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