A Study on the Action Threshold for Control Leiometopon simyrides Staudinger STUDIES ON THE ACTION THRESHOLD OF RICE STRIPED BORER ON HYBRID RICE STUDIES ON THE INJURY EQUIVALENCY SYSTEM AND MIXED ACTION THRESHOLD OF MAIN SOYBEAN LEAF-FEEDING INSECT PESTS ON THE DYNAMIC COMPOUND ACTION THRESHOLDS OF SECOND GENERATION COTTON BOLL WORM AND SPIDER MITES DAMAGED TO COTTON IN NORTHERN CHINA COTTON AREA ON THE DAMAGE AND ACTION THRESHOLD OF NORTHERN ROOT-KNOT NEMATODE TO PEANUT Feeding habits and economic threshold of Locusta migratoria tibetensis STUDIES ON THE ACTION THRESHOLD OF RICE STRIPED BORER ON REGENERATE RICE STUDY ON THE INJURY EQUIVALENT AND COMPOUND ACTION THRESHOLD OF RAPE APHIDS ON THE CHEMICAL CONTROL STRATEGIES OF ARROWHEAD SCALE UNASPIS YANONENSIS INCITRUS GARDEN STUDY ON THE DAMAGE AND ACTION THRESHOLD OF WHITE-BACKED PLANTHOPPER TO RATOONING RICE The occurrence, damage and action threshold of Chinese rice grasshopper,Oxya chinensis, in rice field STUDY ON THE COMPOUND SPECIES ACTION THRESHOLD OF RANGELAND GRASSHOPPERS STUDY ON THE RELATIONSHIPS AMONG WHEAT APHIDS, NATURAL ENEMY AND YIELD LOSS OF WHEAT AND THE ACTION THRESHOLD OF APHIDS A STUDY ON THE ACTION THRESHOLDS OF RICE YELLOW STEM BORER TO SUCCESSIVE CROPPING LATE RICE STUDIES ON THE ACTION THRESHOLD OF GREEN PEACH APHID DAMAGED TO TOBACCO VARIETY Studies on Determining Control Action Threshold by Frass drop Amount of Sucra jujuba