yield loss rate 第1页

STUDIES ON YIELD LOSS AND DYNAMIC ECONOMIC THRESHOLD OF SHEATH BLIGHT OF HYBRID EARLY RICE The economic injury level caused by Tetranychus urticae at apple orchard Comparison of potential yield and resource utilization efficiency of main food crops in three provinces of Northeast China under climate change. EVALUATIONS OF THE DAMAGE OF TWO SPIDER MITE SPECIES TO APPLE TREE