Scaffolds 00 index

(Art Agnello ama4@nysaes.cornell.edu, Entomology, Geneva)

As you make plans for the final apple insect control sprays of the season, keep in mind that this is the time of year to be sure your blocks are not nursing a healthy and expanding infestation of woolly apple aphids. These colonies show up predictably in some orchards, predominantly on unhealed pruning wounds, cankers, or water sprouts. Heavy infestations can cause honeydew and sooty mold on the fruit, and galls on different plant parts. Because woolly apple aphids are somewhat protected by a waxy covering, regular spray programs may not provide adequate control. Higher volume applications of recommended insecticides may be necessary to penetrate the wax.

Aerial colony of wingless adult female woolly apple aphids

Judge the severity of any infestations in your trees, plus the projected harvest dates, and if needed, select a suitable material keeping in mind the respective PHI: Thiodan (21 days) or Lorsban (28 days). Lorsban will also control apple maggot. This is also prime time for an increase in nymphal populations of white apple leafhopper; an average of more than 2 per leaf can be addressed using Provado (7 days PHI), Sevin (1 day), the aforementioned Thiodan, or Lannate (14 days). [Note that Carzol is no longer registered for postbloom use.] Provado and Lannate will also help out on any 3rd brood leafminers and green aphids, and Sevin and Lannate will help control apple maggot.

>8.14 General