论文部分内容阅读
我省麦田叶蝉不仅种类多、分布广,而且为害程度日趋严重。叶蝉为害影响小麦植株的光合作用、养分积累和分蘖及根系的发育,还会降低小麦的抗寒性和子粒的饱满度,有些种类是小麦红矮病的传毒介体。如1989年临汾地区吉县、大宁、永和、隰县、蒲县等5县,由于条沙叶蝉的大发生,每平米方有虫1800～5400头,导致小麦红矮病的流行,发生面积18万亩,占5县麦田总面积的47.8%,减产5～8成的4.4万亩,绝收的近6万亩。1991年10月中旬我所在洪洞县左家沟调查,9月底以前种的小麦全部遭受叶蝉为害,麦苗第一、二片叶子布满了叶蝉为害后的白色斑痕,有的第一、二片叶子已干
Leafy cicada in our province is not only many species, widely distributed, but increasingly serious damage. Leafhopper damage affects the photosynthesis of wheat plants, nutrient accumulation and tillering and root development, but also reduce the cold resistance of wheat and grain plumpness, and some species are wheat red dwarf virus-mediated mediators. For example, in 1989, 5 counties of Jixian County, Daning County, Yonghe County, Lixian County and Puxian County in Linfen City witnessed 1,800,4,400 insects per square meter due to the large occurrence of leaf-leaf cicada, resulting in the prevalence and occurrence of red-dwarf disease in wheat An area of 18 mu, accounting for 47.8% of the total area of 5 counties wheat fields, cut 5 to 8 into 44,000 mu, nearly 60,000 acres of crops. In mid-October 1991, where is my investigation of the left Jiaogou County, Hongtong County, before the end of September all kinds of wheat suffered leafhopper damage, wheat seedlings first, two leaves covered with leaves after white caterpillar damage, and some first, Two leaves have dried