{"id":205,"date":"2015-07-02T20:07:53","date_gmt":"2015-07-02T20:07:53","guid":{"rendered":"http:\/\/agrilife.org\/mid-coast-ipm\/?p=205"},"modified":"2015-07-21T15:57:37","modified_gmt":"2015-07-21T15:57:37","slug":"unusual-cotton-insects","status":"publish","type":"post","link":"https:\/\/agrilife.org\/mid-coast-ipm\/unusual-cotton-insects\/","title":{"rendered":"Unusual Cotton Insects"},"content":{"rendered":"

Leafhoppers\"Mystery<\/a><\/strong><\/p>\n

This past week I have come across several unusual insects and plant injury in cotton fields of the Mid-Coast.\u00a0 This terminal death was first noticed on several cotton plants in one of our field trials.\u00a0 The terminal of 8 plants with in 3-4 feet of row were dead.\u00a0 Some of the branches on these plants were also wilted.\u00a0 No apparent disease symptoms were found on the leaves.\u00a0 The stems broke easily at the lowest part of the plant showing\u00a0 injury but the stem below looked healthy so I don’t think this is a vascular disease.<\/p>\n

We also found a few plants in an adjacent field showing similar symptoms.\"Leafhopper\"<\/a><\/p>\n

I consulted several other entomologists who suggested this was caused by a bug similar to the three-cornered alfalfa hopper.\u00a0 Possibly a leafhopper or sharpshooter.<\/p>\n

Upon sampling the field with a sweep net, one leafhopper was found in 10 sweeps but it escaped before I could get it in a vial.\u00a0 I found a picture of a similar insect in my collection of my pictures from several years ago.<\/p>\n

Fortunately, I could only find about 20 plants with dead terminals or branches in the two fields.\u00a0 So, although an insect causing terminal death is a scary think to have in our cotton fields, this is only occurring on a very small number of plants in a field and is not an economic problem.<\/p>\n

Cotton Square Borer\"Gray<\/a><\/strong><\/p>\n

In another field, I noticed a small butterfly visiting cotton blooms.\u00a0 This was the Gray Hairstreak.\u00a0 The larvae of this hairstreak is the cotton square borer.\"cotton_square_borer_larv2\"<\/a>\u00a0 The cotton square borer is a small green caterpillar having a velvety appearance.\u00a0 This caterpillar will feed on cotton squares but is rarely found to cause economic damage.<\/p>\n","protected":false},"excerpt":{"rendered":"

Leafhoppers This past week I have come across several unusual insects and plant injury in cotton fields of the Mid-Coast.\u00a0 This terminal death was first noticed on several cotton plants in one of our field trials.\u00a0 The terminal of 8 plants with in 3-4 feet of row were dead.\u00a0 Some of the branches on these plants were also wilted.\u00a0 No apparent disease symptoms were found on the leaves.\u00a0 The stems broke easily at the lowest part of the plant showing\u00a0 injury but the stem below looked healthy so… Read More →<\/a><\/span><\/p>\n","protected":false},"author":1158,"featured_media":206,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[11],"tags":[15,30,29],"class_list":["post-205","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pest-management-news","tag-cotton","tag-cotton-square-borer","tag-leafhoppers"],"acf":[],"yoast_head":"\nUnusual Cotton Insects - Mid-Coast IPM<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/agrilife.org\/mid-coast-ipm\/unusual-cotton-insects\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Unusual Cotton Insects - Mid-Coast IPM\" \/>\n<meta property=\"og:description\" content=\"Leafhoppers This past week I have come across several unusual insects and plant injury in cotton fields of the Mid-Coast.\u00a0 This terminal death was first noticed on several cotton plants in one of our field trials.\u00a0 The terminal of 8 plants with in 3-4 feet of row were dead.\u00a0 Some of the branches on these plants were also wilted.\u00a0 No apparent disease symptoms were found on the leaves.\u00a0 The stems broke easily at the lowest part of the plant showing\u00a0 injury but the stem below looked healthy so... 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