White apple leafhopper, Typhlocyba pomaria McAtee: This foliage-feeding insect can be tolerated at low populations. Moderate to high populations can cause indirect damage to fruit in the form of black speckling (sooty mold) which grows on honeydew deposits. An abundance of adult leafhoppers at harvest can also be a nuisance to pickers.

Chemical control: An insecticide is applied in the early postbloom period for first generation control and/or in August for second generation control based on an action threshold averaging 1 to 3 nymphs per leaf.

Amount used

Insecticide

% of acres treated

lb a.i./acre/application

lb a.i./acre/year

Dimethoate

15

0.75

0.75

Imidacloprid

28

0.05

0.05

Methomyl

66

0.34 - 0.45

0.34 - 0.90