Suggestions on sowing Wheat and controlling Diseases and insect pests at Seedling stage

Wheat sowing is about to begin, in order to ensure the smooth emergence of wheat seedlings and next year's bumper harvest, it is very important to pay attention to sowing and seedling pest control. This period is not only a good time to control underground pests, but also a key period to control a variety of soil-borne diseases and systemic infection diseases, such as total erosion, smut (powdery mildew), early sheath blight, root rot and so on. Therefore, this year, we should vigorously promote the techniques of seed dressing and autumn weed management. In order to effectively control diseases and insect pests, suggestions on disease and pest control at sowing and seedling stage are put forward:

I. Agricultural measures

1. Ploughing and killing stubble before sowing, uprooting weeds in fields, fields and ditches, minimizing the suitable environment of soil locust, cricket, gray planthopper and other pests and bacterial sources of many diseases.

2. The appropriate time for late sowing. The implementation of wheat late sowing technology can effectively reduce the infection time of bacteria and reduce the occurrence of total erosion disease, root rot, sheath blight and so on.

3. Select the excellent varieties with disease resistance and disease tolerance.

2. Seed dressing with chemicals

Seed dressing is the most economical and effective method to control many kinds of diseases and insect pests. The main pests and most diseases such as underground pests, soil locusts, gray planthoppers, early aphids and most diseases on wheat in our city can be controlled effectively by seed dressing.

1. To control wheat loose smut, fishy smut, early root rot, sheath blight, powdery mildew and other diseases, use 6% tebuconazole suspension seed coating agent, mix seeds according to 0.03% of seed quantity 0.05% (effective ingredient), pile up for 6 hours. Or use 3% difenoconazole 6-9 grams to water 1000 milliliters, mixed wheat seeds 100kg, or 2.5% trimethonitrile 3.75-5g, 1000 milliliters to water, 100kg mixed wheat seeds, pile up for 3 hours.

2. To control underground pests such as golden needle insects, grubs and mole crickets, use 50% phoxim EC 200 ml, 5 kg of water, 100 kg of mixed wheat seeds, pile up for 2-3 hours after mixing, dry and sow seeds. Note that the concentration should not exceed 0.2% of the seed weight, so as not to affect germination. These seed dressing measures can also effectively control early aphids and gray planthoppers, and control the occurrence of yellow dwarf disease and cluster dwarf disease.

3. In the mixed area of diseases and insect pests, the above fungicides and insecticides can be used to mix seeds at the same time to achieve the effect of multiple prevention, but we should pay attention to: mix insecticides first, plant them to dry and then mix fungicides; mix emulsion first and then mix powder until absorbed and dried.

III. Prevention and control of diseases and insect pests in autumn seedling stage

It can also be sprayed with 4.5% cypermethrin EC 30-60ml per mu, focusing on the prevention and control of the ground and special environment.

2. To control aphids and gray planthoppers, 4.5% cypermethrin 2000-fold spray or 20% acetamiprid 3000-fold spray can be used to prevent the occurrence of virus diseases.

Fourth, vigorously promote the autumn control of weeds

The main results are as follows: 1. For perennial broad-leaved weeds such as Artemisia annua, shepherd's purse, quinoa and so on, benzosulfuron and 2mai 4murD butyl should be sprayed and controlled in time after 2-4 leaves were unearthed. Among them, 2mai 4murine D butyl ester can be used in autumn to reduce the dose by 1 stroke and 3% according to the routine dosage, so as to prevent the occurrence of drug damage and pay attention to the special use of medicine.

2. Malignant weeds of Gramineae were found in some counties of our city this year, and autumn control is the key. Therefore, in the occurrence area of malignant Gramineae weeds, 70% puma tiger (fluazosulfuron) should be sprayed in wheat 3-5 leaf stage and weed 2-4 leaf stage.

3. The above corresponding herbicides can be sprayed in the mixed areas of malignant Gramineae weeds and broad-leaved weeds.