The autumn sowing period is a key period for controlling various pests and diseases of wheat. The main control targets are underground pests such as cockroaches, golden worms and cockroaches, and diseases such as wheat stripe rust, powdery mildew and scab.
According to the excavation survey from the end of August to the beginning of September in the plant protection station of the County Agricultural Technology Center, underground pests occurred in our county, and the whole county was slightly light. The individual fields in the Haizi Village of Chencun Town were heavily biased. The average rate of worms in the county was 86.4%, and the rate of insects was 45.45%. The average number of insects per square (1 square meter) was 1.98, which was 1320.7 of the number of insects, which was 9.83 percentage points lower than the same period of the previous three years, but both were high. In the first two years. There are 6.8 insects per square, and the number of insects is 4536. The main types of hazards were 蛴螬, accounting for 87.16%, followed by Golden worm, accounting for 12.84%. In recent years, the temperature of wheat after sowing has been high, which has created very favorable conditions for the damage of underground pests. It causes different degrees of damage every year and poses a serious threat to the whole seedling of wheat. In order to ensure the normal growth of autumn-sown wheat and reduce the pressure of prevention and control of pests and diseases in the spring of the next year, the main points of prevention and control of pests and diseases in wheat autumn sowing period are proposed:
First, agricultural control. Selection of resistant (resistant) disease varieties, appropriate amount of sowing, scientific fertilization, improve the structure of wheat population, enhance individual resistance; mechanical deep-turning, rotary tillage before sowing, through mechanical killing, exposure, birds and birds eaten to kill some underground pests; application The decomposed organic fertilizer reduces the damage during the seedling stage.
Second, soil treatment. Combine the soil preparation with 3-5 kg ​​of smear phosphorus granules, mix 30 kg of fine soil , and evenly apply the sputum. Or use 50% phoxim emulsifiable concentrate 250 ml plus water 2 kg and 15-20 kg of fine sand to form toxic soil, evenly spread on the soil surface and then turn over.
Third, the chemical dressing:
1 Directly use coated seeds, or use 50% phoxim emulsifiable concentrate 10ml to 1.5-2 kg of water, mix 15-25 kg of wheat, or use 40% methyl isoflavone emulsifiable concentrate 10 ml of water and 1 kg of seed dressing 10 -15 kg, mix well and pile up for 4-6 hours, then dry and sow.
2 rust and powdery mildew often occur in the area, while carrying out underground pest control, we must also do a good job of powder rusting and seed dressing, and actively prevent the occurrence of wheat stripe rust and powdery mildew. It can be sown after dry mixing with 0.3% of the amount of triadimefon (active ingredient).
Precautions:
1. Pharmacy selection: Select the “three certificates†complete pharmacy;
2, to strictly control the amount of drugs, the agent should be mixed and evenly mixed, so as not to cause phytotoxicity;
3, the chemical dressing operation must wear rubber gloves; mixed seeds should not be mixed with chemical fertilizer application, the remaining mixed seeds should be deeply buried;
4, powder dressing can only dry mix, can not be wet mix, wheat seeds are now ready to use, sow seeds mixed on the same day; to strictly follow the seed dressing procedures to prevent human and animal poisoning, it is best to implement uniform seed dressing.
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