What are the common tigers? Earth tiger damage and control measures

What are the common tigers? The ground tigers, commonly known as the silkworm, the cutworm, and the silkworm, are important underground pests of various crops in China. They are now known as small tigers, earth tigers and yellow tigers. The most common and serious damage to small tigers is often harmful to corn, sorghum, tobacco and various vegetables. Therefore, today’s Xiaobian talks about the prevention measures of tigers, as follows.

First, the hazard

1. Earth Tiger

The earth tigers occur for one generation a year, mainly because the larvae overwinter in the topsoil of the weeds in the field, and the hazards are unearthed in March of the second year. In May, the hazard is in full bloom. In September, the pupation begins, and in October, the feathers become adults. 1000 eggs are laid, 11-24 days in egg stage and 30 days in larva stage. It mainly harms corn, sorghum, tobacco and various vegetables, which leads to weak growth of crops and serious death of whole crops.

2, yellow tiger

Yellow tigers occur in the Northeast and Inner Mongolia for 2 generations a year, 2-3 generations in the northwest, and 3-4 generations in North China. They mainly overwinter in the soil of 2-15 cm deep in 4-6 instar larvae, and begin activities in March of the following year. In April, it was smashed in the soil, and the flood season was 20-30 days. Adults of the yellow ground tigers have nocturnal nights and have strong phototaxis and chemotaxis. The larvae are the most dangerous after the third age, and they are harmful in the spring and autumn of the year. The larvae of the yellow ground tigers often bite off seedlings such as crops, fruit trees, and vegetables from the soil surface.

Second, prevention measures

1, clean the countryside

In the early spring, weeds are removed from the ground, the ground, and the weeds along the road to eliminate some eggs or larvae.

2, intensive cultivation

Spring ploughing, destroying the tiger eggs in the soil; in the autumn, the soil is deeped, exposed for 2-3 days, killing larvae and cockroaches hidden in the soil, reducing the wintering base.

3, trapping adults and larvae

Adult control: use the adult's preference for acid, sweet and other substances and phototaxis, using sugar, vinegar, wine mixture, or black light to trap.

Larval control: use paulownia leaves to trap, can also be mixed with gray vegetables, alfalfa, mugwort, artemisia, etc., in the evening, in a small pile of way to place in the vegetable field, the next year to kill the larvae in the pile.

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