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近年来,海南岛三道农场,应用孢子捕捉器捕捉橡胶树白粉病孢子,指导病害防治,行之有效。这个农场过去一直采用嫩叶病率法,预报橡胶树白粉病发生,指导病害防治,即根据橡胶树嫩叶的发病率达到一定数值去决定喷药日期。这种方法由于需钩叶查病,工作量大,平均1个工1天只能查4个林段,同时又由于胶树高,树冠上层叶片很难钩到,在一定程度上影响准确度。 1980—1982年连续3年,他们用嫩叶病率法与孢子捕捉器捕捉橡胶树白粉病孢子测拔法进行对比观察,从中摸索规律,发现在三道地区当橡胶树抽叶率达5％,空中孢子量达到有效临界量(即孢子捕捉器中,4块玻璃片其中1块捕捉到10个以上的橡胶树白粉病孢子)时,5—7天后大田病害就
In recent years, three farms in Hainan Island, the use of spore traps to capture rubber tree powdery mildew spores, guide the disease prevention and treatment, effective. In the past, this farm used the method of young leaf disease rate to forecast the occurrence of rubber tree powdery mildew and guide the disease prevention and control. That is, the date of spraying was decided according to the incidence of young leaves of rubber tree reaching a certain value. This method due to the need to check hook leaves, heavy workload, an average of 1 day 1 can only check 4 forest segments, but also due to gum trees, the upper canopy is difficult to hook to the top, to some extent affect the accuracy . 1980-1982 for three consecutive years, they used the young leaf disease rate method and spore catcher trap rubber tree powdery mildew survey method of spirometry, from which to explore the law and found that in three areas when the rubber tree leaf decay rate of 5%, air When the amount of spores reached an effective critical mass (ie, one of four pieces of glass trapped in the spore catcher, more than 10 rubber tree powdery mildew spores were captured), 5-7 days after field disease