Soil nutrient level has stronger effects on plant tolerance expression than temperature. High concentration ofphosphorus and potassium increases tolerance level.
土壤营养水平对植物耐虫性表达的影响大于温度，增施磷、钾肥可增加植物的耐虫性。
2
Cotton synthesises more GA, IAA to alleviate the phosphorus stress, highphosphoruslevel improves the content of Z.