Seminole Crop E News

Agricultural News for Farmers and Agribusiness in SW Georgia

Spider Mites in Peanuts – 2015

Posted by romeethredge on September 3, 2015

I’m starting to see some spider mites showing up in peanuts. Here in Seminole county we have areas that have been dry the last few weeks and that’s where the problem is on dryland peanuts. Spider mites love hot dry weather.  They are tiny but pack a whallop. They start in spots in the field and then move out. Here’s some photos I took yesterday.

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Here’s some good guidance from UGA Extension Entomologist, Mark Abney. “It is not uncommon to see mites in peanut fields this time of year, and it would not be uncommon for low level mite infestations to fizzle out on their own. My advice last week was to watch mites closely and consider treating if the mites appear to be spreading. After a week of warm dry weather in many areas, mite populations are growing rapidly, and I am becoming more aggressive in my approach. I have seen several fields where mite numbers are now high enough that achieving control with a miticide will be difficult to impossible. The only true miticide registered for use in peanut is Comite (Comite II). This product should be applied in at least 20 gallons of water per acre. Comite is a contact material, so good coverage is essential. A second application may be needed to achieve acceptable control. Spot spraying is an option when infestations are getting started, but I have gotten mixed reports from growers who have tried spot spraying. Remember that we should avoid using pyrethroids in fields where spider mites are present, as these insecticides often make mite problems worse.

A period of extended rainfall like that associated with a tropical storm would be expected to reduce mite populations. Low level infestations could be eliminated under these conditions. High populations can be reduced with rainfall, but if hot, dry conditions return we should watch for mites to rebound in these areas.”

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