Why is the weather dry and prone to insect disasters?

1. The main reason is that locusts are warm and dry insects, and the arid environment is conducive to their reproduction, growth and survival.

2. Because locusts lay eggs in the soil, the soil is relatively solid, and the water content is 10% ~ 20%, which is most suitable for them to lay eggs. Drought makes locusts multiply and grow rapidly, which leads to two disasters.

3. On the one hand, in dry years, because the water level drops, the soil becomes more solid, the water content decreases, and the vegetation on the ground is sparse, so the number of locusts laying eggs increases greatly, reaching 4000-5000 grains per square meter of soil in many cases, and 500-80 grains per egg block, that is, 200,000-400,000 grains per square meter. At the same time, in dry years, rivers and lakes

4. On the other hand, the low water content of plants growing in arid environment makes locusts grow faster and have higher fertility. On the contrary, the rainy and humid environment has many adverse effects on the reproduction of locusts. The water content of plants eaten by locusts is high, which will delay the growth of locusts and reduce their fecundity. The rainy and humid environment will also cause locusts to have epidemics, and rain and snow can directly kill locust eggs.

In addition, the humid environment and the increase of natural enemies such as frogs will also increase the mortality rate of locusts.

In a word, such dry weather is prone to insect disasters.