One to three generations per growing season. � { ����9���rYKKf�홞������۶kG��.�.���v����Pw��K��5m=���[��}��Ż�u�mw�$U�ҟ��u��i�\�9I�M���~mv�.����O8�nt�[. Crops affected by larval and adult feeding include cucumber, Cucumis sativus L., cantaloupe, Cucumis melo L., pumpkin, Cucurbita pepo L., and other Cucurbita spp. Western spotted cucumber beetle, Diabrotica undecimpunctata h�bbd```b``f��`� D2��� ��X�D�x����`���̾�� �t���HN���S@$?3���z�@��i�} ɔ���?�d~ $�^���t�f���F�x� � �m endstream endobj startxref 0 %%EOF 77 0 obj <>stream The female striped cucumber beetles can lay up to 1500 eggs, and the spotted cucumber beetle 200 to 300. Soil that’s moist or saturated with water makes it easier for adult cucumber beetles to dig and deposit their eggs. The female striped cucumber beetle can lay up to 1500 eggs in her short two month lifetime. Larva of the spotted cucumber beetle is known as the corn rootworm and is a severe problem for corn and other agricultural crops. Larval feeding can alter plant growth and reproduction and increase plant susceptibility to pathogen infection (Reed et al. Adults eat seedlings and chew holes in leaves, flowers, and fruit. Shoots and blossoms that exhibit damage Scars on soft fruit Appearance of mosaic virus or wilts in cucurbits. Then, the striped cucumber beetle is usually yellowish yellow and has 3 gray stripes on its rear.. It’s very easy for people to make a mistake of identifying the spotted cucumber beetles and ladybugs as they’re similar at very first glance. Handpicking is difficult because these pests are fast and drop when disturbed. As they feed they transmit the pathogen from one plant to another, and carry it over the winter when they hibernate. Additionally, the middle segment (tibia) of the hind leg on the striped cucumber beetle is yellow, while that on the western corn rootworm is black. 35 0 obj <> endobj 62 0 obj <>/Filter/FlateDecode/ID[<32C1A7BD13224EBA82F8A0AEBA11764D>]/Index[35 43]/Info 34 0 R/Length 127/Prev 940908/Root 36 0 R/Size 78/Type/XRef/W[1 3 1]>>stream The striped cucumber beetle is about 1/5 inch long, and has a black head and yellow-green wing covers with three black stripes. H�\��n�0��y This factsheet is on cucumber beetles, a pest of curcubits. They’ll also eat any newly-hatched larvae they might encounter. Striped cucumber beetles overwinter as adults in plant debris and nearby wooded areas. 1b). Larvae emerge (eclose) from eggs and feed on plant roots for two to three weeks and then pupate in the soil. Adults feed on blossoms of flowering plants, mate and lay eggs in the soil at the base of host plants (cucumber, squash, etc.). The slender white larva grows to about 1/3 inch long and is dark on each end. h�b```e``:$��022 � P���c��A�fv��]3WA$�'�u��"�MV൶�C������&% �����"|F�@Z��A�}@�u��x���2]j��(��m�`!�D����-���%}A�t�"�#��-��r������%���A�Q&@� 5 +m endstream endobj 36 0 obj <>>> endobj 37 0 obj <> endobj 38 0 obj <>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageC]/Properties<>/XObject<>>>/Rotate 0/TrimBox[0.0 0.0 612.0 792.0]/Type/Page>> endobj 39 0 obj <>stream Eggs: Clusters of yellow to orange oval-shaped eggs are laid on or just under coarse, cracked soil. Egg – The oval orange-yellow eggs are found in clusters of 25 to 50 on undersides of host leaves. The striped cucumber beetle ( Acalymma vittatum) is a beetle of the family Chrysomelidae and a serious pest of cucurbit crops in both larval and adult stages. Spotted: Cucurbits (i.e. The cucumber beetle likes to eat your cucumber’s leaves and lay eggs near the plants. 4-6 weeks for each lifecycle. Similarities and differences are highlighted in TABLE 1. Eggs hatch in several weeks and larvae feed on plant roots and underground parts of stems. Striped cucumber beetle adult females lay 200 to 1,200 eggs in the soil at the base of cucurbit plants. %PDF-1.6 %���� Eggs are small and orange-to-yellow in color. I have friends that have used floating row covers with much success. They have distinct black spots or lengthwise stripes on their wings. The adults can be found on cucurbits such as cucumbers and a variety of other plants. Control organically with: Spray with pyrethrum, neem, or spinosad products. They become active in mid-spring, when temperatures begin to increase. Root feeding increases vulnerability to Fusarium. The female spotted cucumber beetle “only” lays 200 to 300 eggs. Larva will … cucumber, squash, pumpkin, muskmelon) legumes, tomato, ornamentals, and fruits, plus many other weeds and cultivated plants. Life Cycle: Adults overwinter in field edges near last year's crop, with a small proportion remaining in the field. In fall or spring, it can be helpful to lightly till soil to kill eggs and larvae. The orange-yellow eggs are laid near the base of host plants. z�D FϮ��!��Uv}$�E�k� %���~e�BKbI�,�E�$YЄr��.�'+ }�z�k�*uK�,�Xo�J>R��6�j���b�!-R���3[�mr��Iɝ�G$�ܐ�ꩌ���"m�S���^4BFc�+|���t�I����V-%bR*�,m�HM�A���l����+a_��=�jj�&XL~lU��ztYP�ͭ��FI����������?�Zy��x��E^�_Ո������oEc�V�F̌U��U����Kף��ȕI�*13�Z��Ma��V3X�=����(�( �UvT�!�np���JxG���O�@�������}��5�EY2�~�u��T��w=�aL�PƺN��D�r${$�x44�`ѢP��"���i�S�"�1��_1��G��C�x���� �~�� endstream endobj 40 0 obj <>stream In spring they deposit their eggs around the base of plants, on vines, or just below the soil surface. The striped cucumber beetle, Acalymma vittatum (Fabricius), is a major pest of crops in the family Cucurbitaceae in eastern North America. 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. 2808-1009 (ENTO-368NP) Authors as Published. Striped cucumber beetles (Acalymma vittatum) are less than a quarter inch long, with three black stripes down their wing covers. Since the cucumber beetle eggs are tiny, the chances that you will get them all the first time are slim to none. Overwinter as adults in plant debris and nearby wooded areas; striped beetles may also overwinter in soil. (Dill and Kirby 2016). When they hatch, the larvae eat the roots of your plants. Avoid this pest by planting susceptible crops around June 15, after overwintering adults have emerged and dispersed elsewhere. Spotted beetle is yellow-green with 12 black spots on the back. It is replaced in the west by Acalymma trivittatum, a duller species often with greyish or pale white elytra rather than yellow. There is one generation per year. f9�ݦ�F��2��[�9r#�����^�s��G:�x����bt��\b�1#�P��T�S��bm�����u����Q6SS�mO�)�i$Ѳ��U)��U%���Z2�첎Y�I����H'H�� If cucumber plant wilts suddenly, check for bacterial wilt by cutting wilted stems, touching the cut ends together, and then pulling them apart slowly. Practice prevention. Central Maryland Spotted cucumber beetles may cause similar damage, but less severe. Adults of the two species are easy to tell apart: the spotted cucumber beetle is somewhat larger and has dark black spots (Fig. Striped cucumber beetle larvae feed mostly on roots and stems. Spotted cucumber beetle (Southern corn rootworm) eats roots of beans and corn as well as cucurbits. They grow to about 3/8 inch long, with three pairs of short legs near their heads. H��W�r����~$RW0�%o�l���*%��p�J���D��&. Not only will it attack your cucumbers, but it will also wreak havoc on your squash, pumpkins and melons. Sap will string out in fine strands. Plants are generally less prone to damage after fruit set. As larvae, A. vittatum live in the soil, feeding exclusively on roots. The slender white larvae (up to 1/3 inch long), have brown ends and injure plants by feeding on roots and underground s… Just add cucumber beetle hunting to your daily garden activities and keep things from getting out of control. Larvae: Both species are yellowish-white, 1/2" long, wormlike with dark heads. These are the striped cucumber beetle (Aclymma vittatum in the eastern U.S. and A. trivittatum in the west) and the spotted cucumber beetle (Diabrotica undecimpunctata). The striped cucumber beetle is a vector of the plant disease bacterial wilt (Eaton 2016). Striped cucumber beetles are specialists on cucurbits (such as cucumbers, squash, pumpkin, watermelons) while spotted cucumber beetles feed on other plants in addition to cucurbits. w�W� |U#� endstream endobj 42 0 obj <>stream Striped cucumber beetle eggs are pale orange-yellow and are laid in groups near the base of cucurbit plants. 1a), whereas the striped cucumber beetle has long black stripes down its back (Fig. Striped cucumber beetles lay eggs at the base of cucurbit plants and their larvae then feed on the roots of these plants. Damage from cucumber beetles can devastate these plants, but with a little cucumber beetle control, you can keep this harmful pests from destroying your cucumber and cucurbit crops. After pupating in soil, adults feed on seedlings, flower petals, leaves, and fruit. Eggs are oval-shaped and range from yellow to orange. Another beneficial insect for your arsenal is the spined soldier bug, which will quite happily suck the life out of cucumber beetles. Use floating row covers over susceptible plants until they bloom. Striped: Primarily cucumbers & other cucurbits, but many other crops such as apple, pear, green beans, okra, eggplant, and potato, plus tree and shrub blossoms. Immature striped cucumber beetles in cantaloupe rind. Prevention and early control are essential. {���LI�;�U/4��� ��`:�"����������z6 �B��C�s_O�g�J��7?Jh&U0*���� uvu��91(24�9&[�Y{ׁ]�T�}8��p� ��� �B��|0�!�s�2��AS(��|� Adults gouge and rasp fruit, especially smooth melons, and damage may be worse on the shaded undersides of fruit contacting soil where beetles congregate to avoid heat. �CEKۤ��D[���hl@�!�z��g㪓 ����I��X�v��=����ֻ�C���֫u REC, Organic, sustainable, ecological gardening. CAUSE. Cucumber beetle is a common name given to members of two genera of beetles, Diabrotica and Acalymma, both in the family Chrysomelidae. Some well-known pests include the western corn … Often, the beetles leave their hibernating sites early in the season (mid-April to early June), and feed on seedlings right as they are emerging, usually killing them. Many are notorious pests of agricultural crops. Striped cucumber beetles lay their eggs directly within the soil of host plants. ]�1��}�m.���l����/q�c�ǽ���0�� �~_�aߝBRe�Z��=^�$t���s��X��I����,S���2>[?�M��9�ߦx�Ay�� ~�b/1~�q�Mq���+��|A���X_0w�f�8DͼqH��9K�,s���.�K�Z��S{h�FM�Q49Kp��,�Yҫ8DM��TB��A� d0B��A� �W��p_��B���#�G����?��x����������e������㹯Ǿʺu)�(�(�(�(�(�(�(��}Mo�*k�zC���c:�!�չ��ν�ڕ�+j׹�P��vE��� �� �F~����o�7�� �F~����o�7�� �F~��Y�9��s%5jY5jY�y ��f�g�:{6~��׊�9�:��o����h���m>O��һ� The cucumber beetle is a garden foe. Eric Day, Insect ID Lab Manager, Department of Entomology, Virginia Tech. REC, Lower Eastern Shore IDENTIFICATION. o�w�;b-9�st*�2o�7̢լբճv/�g>���(|d> �����S�φ=�`؃�����k���š�f�@�u���&�y�[�4�y������� } R�~ nϠ� endstream endobj 43 0 obj <>stream The striped cucumber beetle, Acalymma vittatum F. (Figure 1) is a serious agricultural pest of plants in the family Cucurbitaceae in eastern North America. Inspect chewed leaves, petals, and fruits for adults (especially leaf and fruit undersides touching soil), in flowers and at stem bases. Beetles quickly locate host plants in the spring. |�������Q"$�ͤ>w�0�f�c�h�7x�N���T��G���xU�3����WωV�W�Z���[6���d����,u�%�aN The adult spotted cucumber beetle is yellow, with twelve black spots on its back. REC, Western Maryland Controlling cucumber beetles is important for your garden if you grow cucumbers, melons or squash. H�\�͎�@��~�9�V���^$ ج�!? Spotted cucumber beetle larvae feed on roots, stem base, or fruit surface (thus the name "rindworm"). 1986, Hladun and Adler 2009). Striped cucumber beetle adults emerge in late summer to start a second generation. In spring, spotted cucumber beetle prefers to deposit eggs in wet, coarse soil. Striped cucumber beetles They live through the winter as adults in leaf litter and emerge in late May to early June. We embody the University's land-grant mission with a commitment to eliminate hunger, preserve our natural resources, improve quality of life, and empower the next generation through world-class education. Striped Cucumber beetle is a vector for bacterial wilt disease (Erwinia tracheiphila) in most cucurbits along with squash and cucumber mosaic virus (and others). Cucumber beetle larvae are creamy white and wormlike, with slightly darker heads and tips. of Kentucky The spotted cucumber beetle (also known as the southern corn rootworm), also 1/4 inch … |�N Additionally, there has been increasing concern of western striped cucumber beetle (Acalymma trivittatum –SCB), because it can vector bacterial wilt in cucurbits. The larvae are white grubs with brownish heads. hޤWmO�H��V�/�N��w�� Striped beetle is yellow with three black longitudinal stripes on the back. Damage. ]dKDqGHK���r�V�1&�`��������7\뵸n� V�e>܂�d���j�����5�ًcXFv��l)6#��G6�[��DZ������;�!� �)��%UG��t4� Striped cucumber beetle deposits eggs around the base of plants, on vines, or just below soil surface. Repeat the egg search daily. a��4*%��^9�YqΙ�����Zg׳�$�$8��8D�b�{͵���� :�=6�y`���j�s�v���'����GL@���zG����E Z���W��7>N+g�pgg��v�������a��ìç��uv���F�P�b�sia�u�5���`^d�w8��p�u�_����_B�`^p ]? Currently, there is no good method for predicting when activity will begin. Adults: Up to 1/4" long with black head. Striped cucumber beetle and adults feed on fruit rinds, foliage, while the larvae will feed on the roots as well. jh`����~��yل��xWe��A1���"��N��aS����s_�爀�T_$��A��5Sʢ��-��_�h� �E=��,�~���u}�e'U����1�����O�������_���_�������G��7�1����٠S���8��0���& ��6�l֔|^$���6'���oҌH(��UuCI�̴��L����pz�"�p�� In fall, remove garden debris (overwintering sites). Cucumber Beetles. Remove the row cover once plants bloom to allow insects in to pollinate the flowers. Spotted cucumber beetle: Photo: Dr. Michael J. Raupp, Striped cucumber beetles feeding on melon leaves. These two insects will happily consume the eggs of cucumber beetles. The following spring the beetles may infect new plants with the disease. The worm-like larvae are slender, white, and about 1/3" long when full-grown. This publication is available in a PDF file format only. In spring, spotted cucumber beetle prefers to deposit eggs in wet, coarse soil. Striped cucumber beetle deposits eggs around the base of plants, on vines, or just below soil surface. Larvae eat roots and burrow in young plant stems, causing wilt or death. R. Bessin, Univ. Adult cucumber beetles (1/4 inch long) are yellowish-green in color with dark heads, legs and antennae. Though the striped cucumber beetle occurs throughout Florida, it is the least commo… And the spotted cucumber beetle is often greenish-yellow and possesses 12 black spots on its rear. ID. As soon as they hatch, they begin lunching on leaves of the plants, and within two weeks of starting to feed, the beetles will evolve to pupae. Each egg is about 0.6 mm long and 0.4 mm wide. Cucumber beetle eggs are pale orange in coloration and are laid at the base of the plants and sometimes can be seen when not covered by soil. Cucumber beetles are yellowish green, 6-7mm (1⁄4″) long, with distinct markings on the wing covers. Striped Cucumber Beetles, Squash Bugs or other egg laying insects often arrive at the same time. During the growing season, they are found feeding on seedlings, foliage, pollen and flowers causing greatly reduced yields and sometimes plant loss. The eggs are laid in the soil close to your cucurbits. Striped or spotted adults, depending upon species Whitish, slender larvae with three pairs of short legs; the head and tip of the abdomen are darker . The larvae of several cucumber beetles are known as corn rootworms.. The yellowish-green adult spotted cucumber beetle (Diabrotica undecimpunctata howardi) has 11 black spots and a black head with black antennae.The yellowish-white larvae have brown heads and are ¾-inch (19 mm) long when grown. H�\��j�0����l/�G�`ۤ�\���8�$k��Fq.������[����W��v��V?���u��!�I/�5ujz�Yֶ���V�ݹ�L����e��.G�4���7/s�ه/�x�GS}O��!��ï���V��4�ѳ��.�zm{=�B_��[{V[��Ӯ���|{ʙ'>n�ں�/)Ӎ�^����Ɠ�f���m��6����=v8v��d�����fE^��5xE^�ف=�gv��y�̬C�1�u�:d��d�,�@����� The adult beetles are 1/4" long and yellow-green with black longitudinal stripes. ���}7�mW�������7��2H>�p�OϮ��B%o�al����jIu�;�#� ��aCz��k�!$�lY::o�iI����) ��~-fl�p��X�+�lE+��L+W�ݿ�4٥��uTY�ɫ�m�3S � Five mm long, the striped cucumber beetle is pale yellow with a black head and 3 black stripes down its back. Signs/Damage: Cucumber beetle larvae hatch from orange-yellow eggs laid at the base of plants; then they feed on plant roots for several weeks. )hiE�����%�$�:vj;��of M����������f�0i��)|b�M�����)�(�p&97,Lj|�H&�}Ŕ)C?J��%�(��4OSv�0�o����������?%��{�2��ї�/_B���9[j}� Larvae will hatch from the eggs and eat the plants’ roots. The eggs hatch and the larvae feed on the roots. The yellow adult striped cucumber beetle (Acalymma vittatum) is about 1 / 5-inch (5 mm) long with three longitudinal black stripes on the top wings. Striped cucumber beetles are carriers of bacterial wilt, a serious disease of cucurbits. Adults will eat holes in leaves and pods of host plants. Cucumber beetles overwinter as adults in protected areas near buildings, in fence rows, or in wood lots. ޒ��7�[fOϾ}={y�����K�,p:��YAV�,p��֑R��g���Y6� ��g���Y���c5����>>�>>�>>�>>�>>���O^0������k?g����ǭ�x�3L���/����n�W� V�� endstream endobj 41 0 obj <>stream SYMPTOMS. The adults feed and females deposit eggs in cracks in the soil at the base of cucurbits. Is dark on each end 200 to 1,200 eggs in cracks in the west Acalymma! Virginia Tech wing covers with three black stripes will feed on the back their heads larvae eat the of..., feeding exclusively on roots all the first time are slim to none yellow with a black head and with... 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Close to your daily garden activities and keep things from getting out control! ’ ll also eat any newly-hatched larvae they might encounter egg – the oval orange-yellow eggs pale! When full-grown, squash Bugs or other egg laying insects often arrive the... The same time, squash, pumpkins and melons oval-shaped and range from to! Emerge ( eclose ) from eggs and larvae feed mostly on roots, base... This pest by planting susceptible crops around June 15, after overwintering adults have and! Legs near their heads adults feed on roots, stem base, or just under coarse cracked... 200 to 300 thus the name `` rindworm '' ) with dark heads, legs and antennae for... In fence rows, or just below soil surface less severe black down! Emerge ( eclose ) from eggs and feed on roots, Lower Eastern Shore REC, western Maryland,... Cucumber beetles overwinter as adults in plant debris and nearby wooded areas your cucumber ’ s leaves lay. 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