white-backed planthopper 第1页

EFFECTS OF TEMPERATURE AND NUTRITION CONDITION ON THE POPULATION INCREASE OF WHITE-BACKED PLANTHOPPER STUDIES ON THE DAMAGE AND ECONOMIC THRESHOLD OF WHITE-BACKED PLANTHOPPER TO PADDY RICE ON THE RELATIONSHIPS AMONG THE DETECTABLE TIME AND TAKEN AMOUNT OF PREY IN PREDATOR AND TEMPERATURE STUDY ON THE DAMAGE AND ACTION THRESHOLD OF WHITE-BACKED PLANTHOPPER TO RATOONING RICE