The invention discloses a method for preventing and controlling cnidocampa flavescens on
blueberry plants and relates to the technical field of
fruit tree planting. The method is characterized by comprising the following steps of (1) treatment before planting, wherein before blueberries are planted, soil between every two rows is deeply ploughed by 15-20 cm, obstacle ditches with the width of 10-15 cm are dug, and the blueberries interbreed
medicago sativa; (2) pest killing at the pupation stage, wherein a
fungus pesticide is prepared and sprayed to worm cocoons of cnidocampa flavescens, and 8-12 days after the
pesticide is sprayed at the pupation stage, caught parasitic
natural enemies are released on the
blueberry plants; (3) pest killing at the
adult stage, wherein a bacterium pesticideis prepared and sprayed to the
blueberry plants; (4) pest killing at the larval stage, wherein a prepared
plant extraction solution is evenly mixed with
bacilli for producing
chitinase, and the mixedsolution is sprayed to the blueberry plants; (5) pest killing at the
cocooning stage, wherein an attractant is prepared and poured into hanging cups which are suspended on blueberry branches. According to the scheme, the problem is solved that in the prior art, when cnidocampa flavescens on the blueberry plants is prevented and controlled,
pesticide residues exist in blueberry fruits.