{"id":245,"date":"2015-07-02T19:07:12","date_gmt":"2015-07-02T23:07:12","guid":{"rendered":"http:\/\/site.extension.uga.edu\/tattnall\/?p=245"},"modified":"2015-07-02T19:07:53","modified_gmt":"2015-07-02T23:07:53","slug":"watch-for-pecan-aphids","status":"publish","type":"post","link":"https:\/\/site.extension.uga.edu\/tattnall\/2015\/07\/watch-for-pecan-aphids\/","title":{"rendered":"Watch For Pecan Aphids"},"content":{"rendered":"

One of the more serious pests that affect pecan trees is the black pecan aphid.\u00a0 Pecan growers should be scouting for the black aphid from now through the end of the season. \u00a0The black pecan aphid can cause serious damage to leaves that can result in premature defoliation.\u00a0 Black pecan aphids cause the area of the leaf that they feed on to turn yellow and stop being photosynthetically active.\u00a0 If you are seeing yellow spots on your pecan leaves it is likely because of black aphid feeding.\u00a0 If enough damage to the leaf occurs then the leaf will fall off prematurely.\u00a0 When premature tree defoliation occurs it is likely that the following year\u2019s crop will be negatively affected.\u00a0 It is important to keep as many leaves as possible on the tree in as good of shape as possible for as long as possible to increase the chance of a good crop the following year.\u00a0 \u00a0Longer leaf retention will result in increased energy storage which will result in greater tree health and nut production.\u00a0 Because of this it is important to control black aphids.\u00a0 Some varieties are more likely to have problems with black aphids than others.\u00a0 Sumner, Schley, and Oconee are three pecan varieties that are more prone to black aphid damage. \u00a0\u00a0Generally black aphids are a pest that occurs later in the season, but they can cause problems earlier in the season.\u00a0 Regular scouting is important because insect pests do not always behave the same way each year.\u00a0 The University of Georgia threshold is to treat when: Before July first 25% of compound leaves have two or more black aphids and after July first if more than fifteen percent of terminals have more than one black aphid and black pecan aphid nymph clusters are found.\u00a0 Nymphs are the wingless olive colored offspring of the black aphid.\u00a0 When you start seeing black aphid nymphs it is usually time to treat.\u00a0 Yellow aphids are also an aphid species that affect pecan trees.\u00a0 Yellow aphids can also be a problem as they suck the sap out of the leaves and excrete a sticky shiny substance called honeydew on the leaves.\u00a0 A fungus called sooty mold can grow on the honeydew and reduce photosynthesis greatly.\u00a0 Rainfall can help to wash the honeydew\u00a0off of the leaves.\u00a0 The UGA threshold for yellow aphids is 20 per compound leaf.\u00a0 Some good control options that will kill black and yellow aphids at the same time are closer and carbine.\u00a0 The neonicotinoid insecticides such as immidacloprid should work on black aphids, but there is reported yellow aphid resistance to these insecticides.\u00a0 There are other broad spectrum insecticides that can be used for aphids such as chlorpyrifos, but the general UGA recommendation is to try to avoid using these until pretty late in the season if you have to use them.<\/p>\n

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\"Adult<\/a>
Adult Black Pecan Aphid<\/figcaption><\/figure>\n
\"Black<\/a>
Black Pecan Aphid Nymphs<\/figcaption><\/figure>\n

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\"Black<\/a>
Black Pecan Aphid Damage<\/figcaption><\/figure>\n
\"Yellow<\/a>
Yellow Pecan Aphids<\/figcaption><\/figure>\n
\"Yellow<\/a>
Yellow Pecan Aphids<\/figcaption><\/figure>\n

 <\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

One of the more serious pests that affect pecan trees is the black pecan aphid.\u00a0 Pecan growers should be scouting for the black aphid from now through the end of the season. \u00a0The black pecan aphid can cause serious damage to leaves that can result in premature defoliation.\u00a0 Black pecan aphids cause the area of […]<\/p>\n","protected":false},"author":98,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-245","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/posts\/245","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/users\/98"}],"replies":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/comments?post=245"}],"version-history":[{"count":3,"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/posts\/245\/revisions"}],"predecessor-version":[{"id":255,"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/posts\/245\/revisions\/255"}],"wp:attachment":[{"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/media?parent=245"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/categories?post=245"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/tags?post=245"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}