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麦秆蝇是小麦主要害虫之一,陕西关中地区每年发生4代。成虫盛发期在4月中下旬,5月下旬至6月中旬,7月中下旬,9月下旬至10月上旬,以幼虫在麦苗幼茎内越冬。寄主以小麦为主,大麦为次。每年秋苗期和春季拔节至孕穗期两次为害小麦。麦收后以落粒自生麦苗为夏季寄主。成虫羽化在早晨6—8时盛;羽化后取食补充性营养;苗期产卵在芽鞘上、拔节后在顶端第2、3叶基为多。幼由在苗期和拔节期入侵率高,孕穗期为次,抽穗以后不能入侵,在不同生育期植株上,入侵后表现害状不同。麦秆蝇的为害程度与栽培条件关系密切:早播小麦秋苗期受害重,晚播小麦在春季受害重;合理灌水、密植受害轻:施肥充足、土壤肥沃、生长良好的小麦受害轻。成虫发生期是药剂防治的良好时期。γ666粉剂、烟剂、液剂杀成虫均良好,E605既能杀成虫又具一定的杀卵能力。
Straw flies are one of the major pests of wheat and occur in Shaanxi Guanzhong area for 4 generations each year. Adults flourish in late April, late May to mid June, late July, late September to early October, with larvae in winter wheat young stems. Host to wheat-based, barley times. Annual autumn seedling and spring jointing booting booting wheat twice. After the wheat harvest to the droplet of wheat seedlings for the summer host. Adult emergence in the morning 6-8 Sheng; Feeding supplemental nutrition after emergence; spawning seedlings in the bud sheath, after the jointing in the top 2,3 leaf base more. Young by the invasion rate at seedling stage and jointing stage, booting stage for the second, after heading can not be invasive, in different growth stages of the plant, after the invasion showed different symptoms. The degree of damage of flies and cultivars are closely related to the cultivation conditions: early autumn wheat is harmed in autumn seedling stage and late-sowing wheat is harmed in spring; reasonable irrigation and light planting damage are light: sufficient fertilization, fertile soil and good-growing wheat are harmed lightly. The occurrence of adult is a good time for the prevention and treatment of pesticides. γ666 powder, smoke, liquid kill adults are good, E605 kill both adults and have a certain ability to kill eggs.