Campylomma control without CARZOL

摘要

Campylomma is one of the most tricky pests to control in apples because it damages the fruit during bloom—a time when growers try to avoid exposing bees to chemicals.The standard treatment has been Carzol (formetanate) applied during bloom with the aim of killing campylomma nymphs that attack the developing fruitlets. But the U.S. Environmental Protection Agency announced in 2012 that the tolerance would be revoked onapples, peaches, and pears on December 31, 2013, meaning it can no longer be used.Campylomma overwinters as eggs on the tree. The nymphs that develop from the eggs sting the fruitlets. As the apples grow, they may develop corky warts, russet, or deformities.In a two-year study conducted at Washington State University to compare the susceptibility of various apple varieties, Golden Delicious proved the most susceptible.