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和静县属新棉区,自1994年开始小面积试验,示范种植棉花成功后,种植面积逐年扩大,1998年全县种植2000公顷,6666.7米~2产皮棉72千克。1999年,我们对本县棉花害虫种类进行了初步调查,主要有地老虎、叶螨、棉蚜、棉铃虫等。我县主要农作物有小麦、玉米、棉花、工业西红柿、甜菜、打瓜、油葵等。棉花播种面积一般占总播种面积的15%～25%,利于棉田轮作和安排好邻作。根据预防为主,综合防治的植保方针,结合本县农业生态系统特点,采取以下防治措施。1.调整作物结构、布局.改棉田大面积连片种植为粮棉邻作,增加棉田天敌的来源。我县小麦蚜虫主要为麦长管蚜,多年定点调查和大面积普查均未达到防治指标(500头/百穗),所以麦田不施药,从而保护了天敌,麦收后天敌转移棉田,有力控制了蚜害。2.秋耕冬灌,压低越冬基数。3.认真做好药剂处理种子工作,播前用0.3%敌克松拌种,适时
Hejing County is a new cotton area. Since 1994, a small area experiment has been started. After the successful demonstration of cotton cultivation, the planting area has been expanded year by year. In 1998, the county planted 2000 hectares of cotton and 72 kg of 6666.7 m ~ 2 cotton lint. In 1999, we conducted a preliminary investigation of cotton pest species in this county, mainly including tiger, spider mite, cotton aphid and cotton bollworm. My county main crops are wheat, corn, cotton, industrial tomatoes, beets, melon, sunflower and so on. The sown area of cotton generally accounts for 15% ~ 25% of the total sown area, which is good for cotton rotation and arrangement of good neighborliness. According to the principle of prevention and comprehensive prevention and control of plant protection, taking the characteristics of the county’s agricultural ecosystem, the following preventive measures shall be taken. 1. Adjust the crop structure and layout Change the large area of contiguous cotton fields to cotton and cotton crops adjacent to increase the source of natural enemies of cotton. Wheat aphids in our county are mainly wheat aphid, and both perennial sentinel surveys and large-area surveys did not reach the control index (500 heads per hundred spike) so wheat fields did not apply pesticides to protect their natural enemies. Aphid damage. 2. Autumn plowing winter irrigation, low winter base. 3. Do a good job of medicament seed treatment, before sowing with 0.3% of the enemy grams of pine seed dressing, timely