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