The larvae of the wheat armyworm primarily feed on wheat, rice, millet, and corn. In large infestations, they can also damage beans, vegetables, and cotton by consuming their leaves. These pests are a serious threat to cereal crops, causing significant economic losses if not controlled effectively.
To manage the wheat armyworm, one effective method is to use adult insects to lay eggs on the leaves of cereal crops. Farmers can insert straw or grass into wheat fields, covering an area of 60 to 100 acres, and replace the grass every five days, burning the old material to reduce pest populations.
Another approach involves using a sweet and sour trap. Mix 6 parts sugar, 3 parts vinegar, 1 part white wine, and 10 parts water, then add 1 part of 90% trichlorfon. This mixture can be placed in the field during the adult stage to attract and control the pests. Alternatively, farmers can mix this solution with kimchi water for enhanced effectiveness.
Using black light traps is another common practice to capture adult wheat armyworms. These traps are especially useful during the mating season, helping to reduce the number of eggs laid.
For chemical control, farmers can apply 90% trichlorfon crystals diluted at a ratio of 1000 times, or 50% malathion emulsifiable concentrate diluted between 1000 and 1500 times. A combination of 90% trichlorfon (1500 times dilution) and 40% dimethoate (1500 times dilution) is also effective when applied to third-instar larvae. The recommended application rate is 75 kg of liquid per acre, ensuring thorough coverage of the crop.
By implementing these integrated pest management strategies, farmers can significantly reduce the impact of the wheat armyworm on their crops, protecting both yield and quality. Regular monitoring and timely intervention are essential to prevent large-scale infestations and maintain healthy agricultural production.
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