When prey are plentiful, a random walking pattern is used, allowing them to utilize mites on a leaf most efficiently. When prey are scarce, the predators walk along leaf edges, increasing the chance of moving to a new leaf. Research in Michigan has revealed that this predatory mite exhibits a dispersal behavior which aids in distribution among trees. Massachusetts research has shown that Amblyseius uses chemical signals from prey silk and feces to hunt prey, and furthermore uses its own marking pheromone to mark previously searched areas. Research in Michigan has yielded tentative thresholds for predicting success of biological control by Amblysieus .
Higher ratios increase the probability of success.
Predatory mites do not injure the trees or crop in any way. See Cornell factsheet and New Zealand photos.