Control measures of diseases, insect pests and weeds in wheat from sowing to seedling stage

According to the investigation of the monitoring sites of our station, combined with the comprehensive analysis of climatic factors and related conditions, it is estimated that the overall occurrence of diseases, insect pests and weeds in wheat from sowing period to seedling stage is moderate, and the occurrence of underground pests and weeds in some plots will be more serious. The main control objects that need to take preventive measures are wheat sheath blight, root rot, smut, underground pests, gray planthopper (wheat clump dwarf disease), locust, cricket and wheat field weeds.

1. Clump dwarf disease should be sprayed with 1000 times of cypermethrin or 10% imidacloprid or 40% dimethoate in wheat fields near ditches, roadsides, wastelands, trees, etc., or 1500 times of acetamiprid, or spray 7-10 meters of medicine belt around the wheat field to protect the wheat field from gray planthopper transmission.

2. Locusts and crickets should, on the basis of uprooting the barren weeds around the wheat field, spray 4.5% cypermethrin or 40% dimethoate or other 1000 times liquid at the emergence stage, or spray 7-10 meters of medicine belt around the wheat field in time to protect the wheat field from harm.

3. Underground pests should be sprayed (irrigated) along ridges with 1000 times of phoxim in time on the basis of grasping the seeds treated with chemicals and where there is harm to wheat at seedling stage.

4. For malignant Gramineae weeds, 70% fluazosulfuron, or 6.9% oxazolyl, or 3% methyl disulfuron should be selected for different grass species in wheat 3-5 leaf stage and weed 2-4 leaf stage. To control malignant Gramineae weeds, it is necessary to choose sunny weather as far as possible, and the spraying effect is better when the temperature is above 10 ℃. Second, we should pay attention not to cherish water and medicine, the amount of liquid should be sufficient, emphasize a uniform spray, do not re-spray do not leak spray. Third, it is necessary to grasp the use technology of methyl disulfuron, the drug has a good effect on controlling wheat, but it is necessary to grasp the dosage and the growth period of wheat to avoid aggravation of drug damage.

5. For perennial broad-leaved weeds such as Artemisia annua, Shepherd's purse and wheat bottle grass, benzosulfuron and 2Magol 4D-butyl should be selected to control them in time after 2-4 leaves were unearthed. Among them, 2mine4D-butyl ester can be used in autumn to reduce the dose by 1 stroke and 3% according to the conventional dosage, so as to prevent the occurrence of drug damage, and the equipment should be special.