Some energy traders look instead to woolly worms, small fuzzy caterpillars that are the larva of the Isabella tigermoth, as predictors of winter weather.
In Changli, there were 19 pests harming vine grape. The main pest were green canker worm, two-star leafhopper of grape, dorbeetle, wax cicada, acarus, hawkmoth, tigermoth, rust tick etc.