egg pouch
2.The density of species group,adult and nymph is 3.11/m2,egg pouch is 0.24/m2.Among them German cockroach adult and nymph is 3.01/m2, egg pouch is 0.23/m2. Through yearly control with spraying insecticide of DDVP five times as major IPM, density of adult and nymph control effect is 87.55%, egg pouch is 76. 47%.
