In recent years, the damage of the thrips in corn seedlings has been increasing year by year. Due to the small size of the humming horse, it is not easy to be discovered and often delays the appropriate period of control to cause damage to corn. According to the damage symptoms of corn seedlings, correct identification, and pay attention to timely prevention and control work.
I. Harmful Symptoms Thrips are mainly harmful to corn leaves, and there are intermittent silver-gray patches on the edges of damaged maize leaves, which will cause severe leaf dryness. Throat horses will release mucus in the heart of corn leaves, causing the heart leaves to fail to unfold. With the growth of corn, the heart and leaves of corn form a "whip". If measures are not taken in time, the output will be affected and the harvest will be unacceptable.
Second, control methods in the early stages of the development of thrips, with 3% of the locusts EC 2000 times, or 10% of the WP wettable powder 1500 times, or 4.5% of the 1000-fold cypermethrin 1000 times, on the leaves and heart The leaves are sprayed and controlled. For corn seedlings that have formed a "whip" shape, an awl can be used to penetrate from the base of the whip-like leaf and to open from the middle to allow the heart to grow in time.
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