... ich de bao ve mdi trudng sinh thai. Phuang phap sir dung vi sinh vat trong bao ve mdi trudng khdng nhung mang lai hieu quii cao, an toan, san pham thu hoach khdng anh hudng tdi ngudi su dung, ... trir benh cay la rat cao, ma phan ldn la sii dung thudc hoa hpc. Tren thuc te, phuang phap nay cd hieu qua tuc thdi nhung neu sii dung lau dai se dan den tinh trang thoai hoa dat va khang thudc ... Trong nhung nam gan day phan hoa hge, thudc trir cd dugc su dung vdi sd lugng ldn trong san xuat ndng nghiep d Viet Nam, la nguyen nhan gay 6 nhiem mdi trudng nghiem trpng, dat dai bac mau,...