DAMUS MWANGI

pasteuria pseudomonas agrobacteria control of nematodes plant parasitic nematodes fungal control bacterial control bca suppressive soils nematodes biological control agents sodium essential nutrients beneficial nutrients essentiality of nutrients selenium silicon cobalt plant nutrients mineral elements symptoms of virus aphids control measures against virus transmission of virus virology potato virus y plant virus resistance field screening rearing bioassay method screening for resistance legume pod borer cowpea maruca vitrata volatization environmental concerns health effects of pesticides effects of pesticides fate of pesticide health concern environment pesticide