First, the trend

It is expected that the mixed population of soil pests (including cockroaches, cockroaches, and golden beetles) in the fall sowing season will generally appear to be lighter in areas along the Huai and Huaibei droughts (Level 2), with moderate occurrences in parts of western Huaibei (Level 3). .

Second, field pests

According to recent surveys in the main wheat producing areas in Huaihe and Huaibei, the occurrence of underground pests mainly shows the following characteristics:

1. The population density of larvae has increased slightly in recent years. Some areas in western Huaibei have increased significantly, but the population density of worm population in the province is still at a low level. According to the survey of wheat pests and diseases monitoring sites along Huaibei and Huaibei, the average insect pest per square meter of underground pests in the province was 4.18. Huaiyuan, Guzhen, Lixin, Mengcheng, Guoyang, Fushang, Taihe, and Tie (11) (9) dried scorpion, then Yaokejia Jiaozuo 1.54 ~ 3.8 heads, the population density is low. The average insect population density compared with recent years, Weishan County is the lowest year in the past 9 years, Xiaoxian County has the average value of -48.6% for the recent 13 years, Mengcheng City has the value of -30.8% for the lighter than 2007, and the occurrence of lighter weight in Taihe and Yunnan Provinces. The three-year averages were -51.3% and +18.3%, respectively. However, the average population per square meter of insects in the west of Huaibei such as Jidong, Linquan, Weinan, Fuyang (Yiquan) and Jieshou is 5.23, 6.02, 6.2, 7.7, and 16.7, respectively. Higher. The average insect population density compared with recent years, the most severe year since 2004, Longnan District, Leiyang City, the average value of the recent 10-year -29.3%, near the 3-year average of Zhaoquan District, +102.6%. The highest pests per square meter in Mengcheng, Fushang, Lingbi, Fuyang City (Weiquan District), Weinan, and Jidong were as high as 12.7, 16 heads, 16 heads, 22 heads, 25 heads, and 31 heads respectively.

2. Underground pests are dominated by cockroaches. According to investigations in Lushan, Xiaoxian, Weinan, Taihe, Fushang, Lixin, and Guoyang, pupa is an absolute dominant species of underground pests, accounting for an average of 91.34%.

3. The mouth density of peanut aphid and soybean aphid is higher than other mouthwashes. The density of mouth lice in different crops was investigated. The density of peanut pods and soybean larvae was high, such as screw 9. Tao 颉 19. Shacha (9) Qianjian 8. Spinning shrimp 偃鹊鼗ㄉ缙 偃鹊鼗ㄉ缙 科 科 椒 滓 滓 滓 3.6 3.6 3.67~ 9.4 heads; Mengcheng, Twist 9. Tao Xun (8) Ting 8. Spinning (9) Qianjian 8. Finkel School H offenders 缡 缡 鹊卮蠖 鹊卮蠖 缙 科 科 椒 椒 椒 椒 滓 滓 滓 1.4 1.4~9.3 heads; other mouths The average insect volume in square meters is 1.5~5.1 heads.

Third, prevention and technical advice

According to the occurrence of underground pests in the main wheat producing areas of our province, combined with the prevention of wheat sheath blight and powdery mildew during the autumn season, according to the classification and guidance of the base population of insect populations, good chemical seed dressing and pesticide soil treatment.

1. Prevention and control indicators: 4 insects per square meter, 4 insects, 0.3 insects, and 5 adult insects.

2, prevention and control technology:

(1) Seed Dressing: Each 50 kg of wheat seeds use 25 grams of active ingredients of phoxim or 20 grams of methylisophosphorus active ingredient, add 2~3 kilograms of water, spray and mix with a sprayer, and wait until dry and dry. . For the wheat sheath blight and powdery mildew recurrence areas, add another 2.5 grams of diclofenoniil (Cola), or tebuconazole wet mix, 1.5 to 2 g of water, and 3 kg of water to spray and mix. Sow 2~3 hours. When wheat seed dressings are used, they should be used according to the prescribed dosage, and they should not be arbitrarily increased in dosage so as to prevent phytotoxicity. After seed dressing, the sowing depth should not exceed 5 cm.

(2) Soil treatment: 3% phoxim granules per acre or 3% methylisothiphos granules 3~3.5kg, or 40% methylisothiphos EC 250ml, or 50% phoxim EC 400 ml, add 2 kg of water and mix 25 kg of fine sand (earth). Spread the wheat before sowing, sow after sowing, or ditch (hole) application. After sowing, it can be sowed.

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