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我场在打洛坝区,植胶十八年来,于去年雨季首次发生了季风性落叶病。全场2400多亩割胶林地,约1000多亩遭到不同程度的为害,造成中下层叶片凋落,枝条回枯,胶果腐烂及割面溃疡。调查1350株,发病65.7％,受害指数19.6,因病停割5％;由此病引起的割面溃疡占47％,受害指数20.9,停割12.9％。无论从当前或长远来讲,割胶生产都受到较为严重的经济损失。 由于1978年7—8月份雨水很集中,阴雨天多,日照少,是季风性落叶病发病的有利条件,到7月底开始发现个别树位少数植株下层叶片发黄。8月上旬少量叶片
My field in Daluo District, plastic planting eighteen years ago, the first monsoon deciduous disease occurred last rainy season. The audience of 2400 acres of tapping woodland, about 1,000 acres have been different levels of damage, resulting in the lower leaves litter, branches back to dry, plastic fruit rot and cutting ulcers. Investigation of 1350 strains, incidence of 65.7%, victims index 19.6, due to sick stop cutting 5%; caused by the disease cut ulcers accounted for 47%, victims index 20.9, 12.9% cut. In both the current and long term, tapping production has suffered more serious economic losses. Since July-August 1978 was characterized by heavy rain, rainy days and few sunshine, it was favorable conditions for the onset of monsoon deciduous disease. By the end of July, it was found that leaves of the few plants in individual trees turned yellow. A few leaves in early August