Recently, a large number of farmers have reported that the wheat field has been harmed by worms. The author made the following analysis based on the law of occurrence and damage of golden needles:
First, the cause
1. During the period from the time of wheat sowing to before winter, the temperature is high, and the soil temperature is conducive to the underground activity of the golden worm. And in October this year, the rainfall is relatively low, and the soil moisture is also conducive to its activities.
2. With the popularization of straw returning, it provided a good habitat for the underground pests, especially those with poor land preparation.
3. No seed dressing was done.
Second, prevention and control measures
According to the occurrence regularity and field management characteristics of the golden leafworm, the prevention and control measures based on agricultural control and chemical control are taken as the main methods.
1. Agricultural measures. (1) Fine soil preparation, rough farming, killing insects; (2) watering can reduce the damage of the golden needle. When the soil moisture reaches 35% -40%, the worms stop harming and drill to a depth of 15-30 cm.
2. Chemical control. (1) Chemical seed dressing. The use of the current high-efficient pollution-free seed dressing agents for seed dressing, reducing hazards. (2) Toxic soil and poisonous bait. Spread wheat in the fields at dusk and kill them by using the habit of underground pests to live at night. (3) Irrigation. In the case of dead seedlings caused by early damage to the winter wheat, early rooting should be carried out to prevent the spread of pests. Available 48% chlorpyrifos per 100-150 ml, 100-150 kilograms of water to irrigate the root or irrigating at the time of pouring. For areas with insect pests, the area for irrigation should be appropriately increased to improve the control effect.
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