A Detailed Guide to the Latest Control Methods for the Sorghum Chinch Bug
The sorghum chinch bug, also known as the sorghum narrow long bug, is distributed across most regions of China and mainly parasitizes grasses such as sorghum, wheat and rice. It damages plants as adults and larvae, sucking the plant sap, which causes the leaves to turn yellow and growth to slow. So how should the sorghum chinch bug be controlled? Let us take a look at the detailed introduction below.
1. Symptoms of occurrence
It damages plants as adults and larvae. Adults generally cause damage from May to June, while larvae generally cause damage in April and July. After hatching, the larvae gather on the leaves and constantly suck the sap from the mesophyll tissue. The larvae feed in smaller amounts, while the adults feed in larger amounts and can form a dead spot on the leaf in a short time. As the dead spot grows larger, the leaf gradually withers and dies, causing the plant to grow slowly; in severe cases the plant dies from lack of water, making the damage extremely serious.
2. Pattern of occurrence
It can produce two generations a year. Adults overwinter in underground stems, leaf sheaths or below the surface soil. After temperatures rise in spring, they begin to revive. In early April they begin to lay eggs, and early May is the peak egg-laying period. Differentiation begins in early May, and the first-generation larvae appear; in about one month they grow into adults. Adults mate and lay eggs in late June, and the second-generation larvae appear in July. In September the second-generation adults begin to overwinter, and the cycle repeats.
3. Control methods
To control the sorghum chinch bug, physical control should be combined with chemical control. First, before planting, clean the field, remove the diseased and damaged plants from last year, and plow the soil deeply to kill overwintering adults using the sun, reducing the source of the pest. When the first-generation larvae appear, you can spray 80% dichlorvos emulsifiable concentrate at 900-1000 times dilution or 90% crystal trichlorfon at 700 times dilution, spraying 75 kg of spray liquid per mu, which gives a good effect.
The above is an introduction to how the sorghum chinch bug should be controlled. We hope everyone has a good harvest every year. We hope this helps you. If you want to learn more related knowledge, please keep following us.