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采用“二次联防”策略防冶番茄灰霉病,能巧妙地控制灰毒病危害,但是,由于长期单一使用杀菌剂,病菌产生了抗药性,防治效果明显下降。为此,北京市农林科学院植保所李明远等人提出,防治番茄灰霉病,用药宜“一换二轮”。 “二次联防”策略是根据灰霉病的发生规律提出的。灰霉病主要在番茄结果期危害,通过败落的花瓣和衰弱的柱头侵染,分别引起邻近萼片的果面和果实的脐部发病。如果在发病前把这两个部位用药保护起来,第一次用药与施
The use of “second defense ” strategy to prevent tomato gray mold disease, can skillfully control the gray ash hazard, however, due to long-term single use of fungicides, bacteria have resistance, the control effect decreased significantly. To this end, Beijing Academy of Agriculture and Forestry Plant Liming Yuan et al proposed prevention and treatment of tomato gray mold disease, medication should “for a second round ”. “Second defense ” strategy is based on the occurrence of gray mold disease. Botrytis cinerea is primarily harmed in the tomato fruit stage, infecting the deciduous petal and debilitating stigma, respectively, causing the fruit surface of the adjacent sepals and the umbilicus of the fruit. If the two parts before the onset of medication protection, the first medication and facilities