From many years field experiments and laboratory analysis shown that, the midrib base of the plus one lamina of sugar& cane is the most appropriate diagnostic site of potassium nutrient for fast test. 经多年田间试验及室内化验分析表明:甘蔗植株钾素营养速测诊断最适宜的部位是正1叶中脉基部。
The difference of resistances to conventional insecticides was evaluated in field populations of Helicoverpa armigera from Xinjiang and North China by topical application and diagnostic dosage test. 本文采用点滴法和诊断剂量法,比较研究了新疆与华北棉区田间种群棉铃虫对不同类型杀虫剂代表品种的抗性差异。