Automatic insect report light to measure the effect of two-pointed moth caterpillars on summer sowing crops

The two point insects are a very important agricultural pest in the process of agricultural planting, and their 2nd generation attracting insects are very harmful to the summer corn. Since 2010, serious damage to summer maize seedlings has been reported in the Nandagang Management District of Chenzhou City, Hebei Province. The larvae bite on the base of the stem of the seedling to form a bored hole to cause dead seedlings, or to bite off the aerial roots of the plant to cause lodging. In severe cases, the rate of damaged plants can reach more than 30%, yield loss can be more than 20%, and even destroy plants.

The automatic bug reporting lamp of the Nandagang Management District is located in a test site of an open-air agro-forestry research institute without buildings. The moths began on May 1 and the moths were recorded on a daily basis until the end of September.

The two spotted moths tend to produce a shaded ecological environment with wheat straw and wheat straw returning to the field, regardless of the type of summer sowing crop. However, the damage rates of the three crops are significantly different. The damage rate of corn plants ranges from 10% to 12%, while sorghum and soybeans have not been affected. In the corn field, the use of poison baits was uniformly controlled on July 6. Although the amount of insects did not decrease significantly, the rate of damaged plants in maize did not continue to increase. In the survey, it was found that there were more larvae around the corn seedlings in the wheat stalks than in the ridges, while the sorghum and soybean seedlings around the wheat stalks were similar to those in the ridges. Although larvae of sorghum and soybean seedlings did not feed on plants, their development was still normal. The survey found that two A. moths can feed on expanded wheat and germinated wheat seedlings in the field. It was found that 12 larvae on a wheat ear were feeding, and it was also found that the larvae ate moist, rotted wheat straw and young weeds under wheat straw. This shows that the two-pointed moths are able to survive normally under the wheat stalks, which are rich in wheat, damp plant residues and putrefaction, and have strong ability to fight rot. When there are summer crops in the field, they are compared with sorghum. With soybeans, they tend to eat corn more.

Through the automatic insect report lamp, it was found that the number of second-generation larvae of E. apetala was large, the density was 100 heads/m2, and sometimes there were 20 heads around a single corn seedling, and it was inevitable that farmland potions were used to kill such a large number of larvae. It will cause environmental pollution. Based on the two-point A. moth is a kind of rot-feeding pest, using poison bait sprinkled near the corn seedlings, will kill the larvae that harm the corn, play the role of seedling preservation, both to save pesticides and achieve control effect, it is worth promoting.

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