The Main Points of Prevention and Control of Crop Diseases and Insect Pests During the Three Summer
During the summer of the three summers, crop pests and diseases in our city mainly include second-generation armyworms, a generation of corn borers, a generation of small ground tigers and yellow ground tigers, corn rough dwarfs, peanut aphids, second-generation cotton bollworms and peanut aphids, according to plant protection station with black light Yang Shuzhi integrated larvae into insects and census eggs in the field. Combined with the weather forecast by the Laiyang Meteorological Bureau, it is estimated that the level of occurrence of pests and diseases at this stage will be 2.2286, and the accumulative area will be 420,000 mu. This will prevent and control crop diseases and insect pests during the Three Summers period. analyse as below:
I. Maize Rough Dwarf Disease: It is the main disease on spring corn and seed corn. The main means of transmission is poisonous ash planthopper that harms corn. This year is a small year. Control measures: 1. Maize 2-3 leaf mu with 10% imidacloprid 10 g plus 20% virus A 100 g plus potassium dihydrogen phosphate 200 g watered 50 kg spray; 2. 0.5% crude shrinkage killing agent per acre 50 ml water 50 kg spray.
Second, a generation of corn borer: a generation of corn borer mainly damage the spring corn and seed corn, the perennial strain rate of more than 60%, reduce production by more than 10%, as of June 5, 20 watts of black light total lures 17. Due to the large amount of winter straw reserves, the planting area of ​​spring maize seed corn is small, the adult spawning is concentrated, and the larvae damage is relatively aggravated. It is expected that this year will be moderate, with an area of ​​about 0.8 million mu, and the appropriate control period will be around June 26. Control indicators: mosaic rate of 10%. Control methods: 5% phoxim granules 250 grams per mu or Bt emulsion 100 ml, add 10 kg of fine sand, sprinkled into the heart of corn leaves.
Third, the second generation of armyworm: the second generation of armyworm is the main pest of interplanting corn, larvae eat corn leaves, enter the gluttony period after the third instar, when serious, eat the leaves of corn seedlings, resulting in absolute production, is interplanting corn Key pests. The 20-watt black light of the plant protection station saw the moth on May 28 and so far it has attracted 6 moths. The 10 branches of poplar branch saw the moth on May 29th and 10 moths have been attracted so far, which is less than the average year. According to the current insect amount and weather Conditional analysis, the second generation of this year, the armyworm is a small occurrence, with an area of ​​about 0.2 million mu. The appropriate period for prevention and control will be around June 22. Control indicators: Wheat field has 30 insects per square meter, 10 interplanting corn plants have 10 insects, control methods: 1, 50% phoxim 1500 times liquid spray; 2, 80% DDVP 2000 times spray.
Fourth, a generation of small tigers and yellow tigers: As of June 7, a 20-watt black light in our city accumulated a total of 14 moths, the amount of moth is close to normal, is expected to occur this year as a small occurrence of an area of ​​about 10,000 acres. Control methods: Use 50% phoxim or 48% Los Herb 2000 times per acre to root.
V. Peanut pods: This year, the occurrence of mild to moderate occurrences occurred frequently in the land mass, with an area of ​​150,000 mu, and the control period was July 10-20. Control methods: 1, open ground peanuts with 3% phoxim granules 4 kg per mu, soiled 40-50 kilograms of piers, and soil to meet the fruit pin; 2, coated peanuts with 50% phoxim or 48% music Spear 500 ml per acre, watered 750-1000 kg irrigation pier; 3, protection of hip ditch bumblebee resources can be planted around the peanut ground beans, kenaf and other nectar plants induced insects, improve the bumblebee parasitic rate.
6. Peanut locust: It is the main pest of peanut seedling stage, according to the city plant protection station June 1-2 in Tangezhuang, bath shop, acupuncture points, Wandi, Fenggezhuang and other township surveys, early spring host aphids, hedgehogs With a litchi rate of 10-30%, an average of 210 pods per locust and more winged pods, this provides sufficient insect resources for the occurrence of peanut aphids. According to the survey, there are 5-30 pods of pods covered with peanuts, with an average of 19 heads, and the average rate of pupa is 12%. There are 50-180 heads of peas in open pits, with an average of 70 heads. The rate of pipa piers is 18%, and the number of natural enemies is low. , Ladybug hundred worms 0.1 head. According to the forecast of the Bureau of Meteorology, the recent climatic conditions are conducive to the occurrence of peanut aphids. It is expected that peanut aphids will occur lightly this year, with an area of ​​about 200,000 mu. The appropriate control period will be around June 20. Control indicators: Baidun has a total of 1,000 heads. Control methods: 10% imidacloprid EC 20 grams per mu watered 100 kg spray.
Seventh- and second-generation cotton bollworms are the main pests in the flowering period of peanuts, which mainly damage peanut leaves and are often pests on peanuts. This year is a small occurrence, with an area of ​​50,000 mu. Prevention and control indicators: 40 worms The appropriate period of prevention and control around July 5, prevention and treatment methods: 1, BT emulsion 300 ml / mu, egg hatching spraying period, 7 days after spraying. 2, 50% phoxim or 1.5% chronus 50ml/mu spray control.
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