With fall webworms, Bt is effective only if its application is properly timed. Once the caterpillars have enshrouded themselves in webs, they are more difficult to kill.
Fall Webworm
Symptoms: Chewed leaves; in summer and fall, silky webs appear at the tip end of branches, with larvae visible inside.
Offenders: Adult webworms, about 1 inch long with a dark stripe down their backs.
The most common are the Eastern and Western tent caterpillars, fall webworm and euonymus caterpillar.
Look-alikes: Often mistaken for the gypsy moth. Plants attacked: Different species feed on different plants.
Bagworms Birch Borers Vinca Blight Copper Deficiency Crab Grass Cucumber Beatles Cutworms Crown Gall Cucumber Beatles Cutworms Dog Injury Dormant Oil Dried Blood Eastern Tent Caterpillar English Ivy & Brickwork Euonymus Scale Fall Webworms Flickers ...
Some of the most important are the fall webworm and the walnut caterpillar. Watch for infestations of these pests.
Tent caterpillars feed and establish their silky tents in the crotches of trees and shrubs in late spring. It should be noted that fall webworm and tiger moths would also make "tents" as do some other insects.
The adults feed on large caterpillars, such as tomato hornworms, walnut caterpillars and fall webworms, by piercing them and sucking them dry. They will not bite humans readily, but when they do, the bite is very painful.
 See also: Caterpillar, Webworm, Insect, Plant, Spring
  
|
RSS
