Apple Spray Guide
Apple Spray Guide. Several apple tree pests make spraying pesticides or horticultural oil a necessity if you want to harvest mature fruits. Identifying the pests, then following up with the appropriate spray at the right time can help control the problem.
Several apple tree pests make spraying pesticides or horticultural oil a necessity if you want to harvest mature fruits. Identifying the pests, then following up with the appropriate spray at the right time can help control the problem.
Dormant Stage
Horticultural oils should be sprayed on apple trees just before the leaves emerge. The oil helps smother insects living in the tree. The oil also helps to kill the insect's eggs before they get a chance to do harm.
After Blossoming
Several pests, including curculios and codling moths, can destroy the fruits before they mature. As soon as the apple blossom petals fall off, the tree should be sprayed with phosmet to kill the curculios. The tree should be sprayed for codling moths about 15 days after the blossoms begin to fall off.
Summer
In late June, the apple maggot emerges as an adult fly. The adults suck up moisture from the surface of the tree's leaves and fruits before the females lay eggs in the fruit. To get rid of apple maggots, spray the tree while the females are feeding, usually in late June. Spray again every two weeks through August.
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