Insecticides

Ca, Terpillar Insecticide

The caterpillar is a pest native to all the farmers. Populations vary from year to year, with eruptions occurring every several years. Defoliation of trees, structure of unsightly silken nests in trees and wandering caterpillars swarming over plants, walkway, and roads cause this insect to be a pest in the late spring and early summer. Caterpillar nests are commonly found on wild cherry, apple and crabapple but may be found on hawthorn, maple, cherry, peach, pear and plum as well. Few caterpillars can nearly defoliate a tree when several, the tree will usually recover and put out a new yield of leaves.

In the landscape, nests can become an eyesore, mostly when exposed by tremendous defoliation. The smooth nests are built in the crotches of limbs and can turn into quite large. Larvae source considerable alarm when they begin to wander to sheltered places to pupate. They are often seen crawling on other types of plants, walkways and storage buildings. They are a pest and can create a mess when they are squashed on driveways, sidewalks and patios. But keep in mind that no extra feeding or harm is done by the wandering caterpillars insecticides are usually unsuccessful against mature larvae.

Types of caterpillar: Eastern tent caterpillar nests are usually confused with fall webworm nests. Different fall webworm nests are located at the ends of the branches and their freely woven webs enclose plants while the tents of the eastern tent caterpillar do not. While there may be some overlap, fall webworm usually occurs later in the season.

Management: Natural enemies participates an important role in falling caterpillar numbers in most years. Caterpillars are frequently parasitized by various tiny braconid, ichneumonid and chalcid wasps. Numerous predators and a few diseases also help to control their populations. This, in part, accounts for the fluctuating population levels from year to year. Prevention and early control is significant. Elimination and destruction of the egg masses from ornamentals and fruit trees through winter greatly reduces the difficulty next spring.

In the early spring, small tents can be detached and destroyed by hand. Larger tents may be pruned away and destroyed or removed by twisting the nest upon the end of a stick. Burning the tents out with a torch is not suggested since this can easily damage the tree. Young caterpillars can be killed by applying an insecticide containing. Larvae inside the tents are protected under the webbing and are harder to kill with an insecticide

Insecticides