Fruit trees differ considerably in the amount of care required because the severity of insect and dis- ease attacks and the length of time from bloom to harvest vary among types of fruits and among varieties.
Generally speaking, the flowers and fruits must be protected from insects and diseases by sprays applied from blossom time until harvest. Other sprays may be required to protect the leaves, trunk, and branches.
The length of the spray schedule should be considered in the selection of fruits and varieties. Cherries, for example, have the shortest spray schedule. The spray schedule for ‘Redfree’ apples, which ripen in July and August, is two months shorter than the spray schedule for ‘Golden Delicious,’ ripening in September and October. A general rating of the length of spray schedules is given below. Spray schedules are given in University of Illinois Extension Pest Management for the Home Landscape.
Length of Spray Schedule
- Early Peaches, Apricots
- Later Peaches, Summer Apples
- Plums, Pears
- Fall and Winter Apples
In areas free from apple maggots, an abbreviated schedule for pears may be used with some success. In Illinois, the apple maggot area runs from the Wisconsin border south to a line from Danville to Quincy.