Suppressive effects of non-preferable plant alcohol extracts on diamondback moth Plutella xylostella population EFFFECTS OF AILEIOCHEMICALS FROM AGERATUM CONYZOIDES ON THE FIELD POPULATION OF DIAMONDBACK MOTH (DBM), PLUTELLA XYLOSTELLA STUDY ON THE IMPROVEMENT AND APPLICATION OF THE NEIGHBORHOOD INTERFERENCE INDEX MODEL Evaluation on the controlling effects of eight insecticides on the natural population of citrus leaf-miner Evaluation of non-host plant ethanol extracts against Plutella xylostella population Suppressive effect of secondary substances on Liriomyza sativae population Repellency of α-pinene against stripped flea beetle,Hyllotreta striolata(F).