Insecticidal Test of the Extracts from Tomato Stems and Leaves to Lipaphis erysimi Kaltenbach Acute Toxicity Analyses of Stellera chamaejasme Root in Mongolian Gerbils(Meriones unguiculatus) Establishment of Cell Suspension Culture Line and Suspension Culture from the Neem Tree A Preliminary Study on Bioactivity of Orangeand Tangerine Peel Extracts Against Aphis and Mites Control effect of azadirachtin on the Colorado potato beetle Leptinotarsa decemlineata