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Ambrosia Beetle, Bud Moth, and Pecan Nut Casebearer

As of May 4th, 2014 Will Hudson and the Pecan Pest Management Hotline reports to be on the watch for ambrosia beetles and bud moths. Pecans should be scouted for these insects and their symptoms. This includes new foliage webbed together, expanding buds with damage, and frass at the site of injury. According to the hotline no pecan nut casebearers have been found. Control of this insect is considered by many entolomogists to be usually unnecessary. Here is an article from Lenny Wells, Extension Pecan Horticulturist, about the Pecan Nut Casebearer:

We’re getting close to the time of year when pecan growers become concerned about spraying for pecan nut casebearer. Historically, this spray has always gone out in mid-May in the Albany area. We’ve seen many years in which high trap catches resulted in no nut damage and also years in which nut damage was visible with very few moths caught in the traps. Two consecutive days of trap catches tell you that egg laying by female moths may begin in 10-14 days. So far this year, we have not heard of any trap catches in Georgia aside from a small amount in extreme South Georgia.

However, all the research in Georgia indicates that treating for casebearers based on trap numbers is a bad idea. Most entomologists (UGA and USDA) now agree that casebearers rarely ever reach population levels high enough to cause economic damage to pecan in Georgia. You may see a little damage but rarely is it so great that the cost of control is justified. In fact, in years with a heavy bloom, which we appear to have in 2014, you may benefit from allowing casebearers to thin the crop load for you a little. Ted Cottrell and Will Hudson have a thorough article on why casebearer control is usually unnecessary in Georgia  in the latest issue of the Pecan Grower Magazine.

aabeetle

(Ambrosia Beetle damage)

bud moth

(Bud Moth)

pecan-nut-casebearer-damage

(Pecan Nut Casebearer damage)