Post-Spring Wheat Pest Control

The turning of wheat to its jointing stage is another peak of the spread of viral diseases such as root disease, sheath blight, and root rot disease, and dwarfism and yellow dwarf disease. This period is the period when wheat spiders, underground pests and weeds are in danger. It is a key link in the comprehensive prevention and control of wheat diseases and pests.

Return to the green period

Strengthening fitness cultivation and preventing pests and weeds should organically combine the cultivation measures with the control of pests and diseases, vigorously implement high-yield fitness cultivation techniques such as proper paddling, top-dressing and watering, and increase the ability of wheat to resist various diseases. In the proper period, weeding can be eradicated, and at the same time we must seize the appropriate period of control after the return of wheat from late February to mid-March, and carry out timely chemical weeding.

In recent years, the root disease of wheat, which is mainly caused by sheath blight, has been seriously affected, which has a great influence on the yield of wheat, especially the high-yield land. The key technology for the prevention and control of wheat sheath blight is mixed and sprayed, that is, seed dressing and spraying in the green period. In the prevention and control of wheat sheath blight, there is a spraying prevention and control of ignoring the green period, and the prevention and treatment time is late, which is the main reason for poor control efficacy. Therefore, we must pay attention to the prevention and control of returning to the green period, grasp the appropriate period for prevention and control, use the pesticides for roads to prevent and control according to the pest control index, and apply pesticides and bactericides to mix pesticides and apply scientific methods.

Disease and Insect Pests Prevention and Control Indicators The main pest control indicators for wheat returning to the jointing stage are: Sheath blight is 15% to 20% of the diseased plant rate, soil pests are 3% of wheat seedlings, and wheat spiders are 600 per meter. Prevention of sheath blight can be used 5% Jinggangmycin 150-200 ml per mu water 75 to 100 kg sprayed wheat stem base prevention, spray 10 to 15 days intervals; control of underground pests available 40% methyl isofluosal or 50 % phoxim 40-50 ml sprayed wheat stem base per acre; control wheat spider can be used 73% Kotel emulsion 1500 ~ 2000 times liquid spray control.

Heading period

The ear stage of wheat is the concentrated and endangered period of various pests such as wheat aphid, aphid, midge, powdery mildew, stripe rust, leaf rust, leaf blight, head blight, and blight. These diseases and insect pests have the largest area of ​​wheat aphids and are the most serious. Wheat ear stage is the period when the wheat finally forms yield, and it is also a concentrated occurrence of multiple pests. Once the pests are harmed, it can cause irreparable damage. Therefore, the wheat ear stage is the final and the most critical period for comprehensive prevention and control of wheat diseases, weeds and weeds. We should effectively prevent and control pests and diseases to ensure the high quality and high yield of wheat.

The use of natural enemies to control wheat and wheat is a breeding ground for various natural enemies and breeding grounds for early spring. Protecting natural enemies in wheat fields is not only beneficial to the control of wheat pests, but also the main source of natural enemies of post-crop crop pests, and should be protected and utilized.

Chemical control should be based on the wheat pest and disease prevention and control index, seize the appropriate period of prevention and control, use the agent of the road to carry out prevention and control, apply pesticides and fungicides mixed application technology, and implement scientific prevention and control. (1) The main pest control indicators in the wheat ear stage are: 500 for the wheat bran, 25 for the first generation, and 5 for each sample (10 cm, 10 centimeters, and 20 centimeters) for the insects during the pupal stage. From 10 to 25 heads, the rate of diseased leaves was 2% to 5% for leaf rust, 5% to 10% for leaf rust, and 10% for powdery mildew. 2 pairs of drugs, dosage and methods of treatment are: control of wheat bran can be used to 2.5% per cent of the enemy to kill EC per acre 10 to 15 ml or 50 mortis fog WP wettable powder 8 to 10 grams per mu; prevention and control of a generation of insects Can be used 50% phoxim EC 50 ~ 75 ml spray control; prevention and treatment of rust, powdery mildew can be used 25% Baolitong WP 30 grams per mu or 40% Triadimefon 50-75 ml per acre spray control; control of head blight Bacterial blight and blight can be controlled by spraying 50% carbendazim WP with 75-100 g/mu. 3 The mixed application technology should be scientifically applied according to the control object and prevention index. When a single species of insects is heavy and other occurrences are light, single pesticide control should be performed to avoid waste and pesticide pollution. (4) Prevention of wheat head blight and blast blight should be based on prevention. In case of a panicle weather in the ear period, spray prevention should be performed after the wheat has been flowered. Although wheat midge insects are pests infested at the ear stage, the appropriate period of control is during the flood season in mid-late April. Prevention and control should be carried out at the right time in the flood season to improve the control effect. It can use 40% methylisothiphos EC to 150-200 ml per mu. 30 to 40 kilograms of fine sand or fine sandy soil is applied to the ground and demarcated, and the control effect after the application of watering is better; if it fails to prevent and control, the control of the adult insect pests of the sucking insects can be used for 70% of the wheat in the field, and 50% is used for heading. Phoxim EC 50 to 75 ml spray control.

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