Influence of temperature and humidity on pests in the environment

Disease pests have always been the number one enemy of plant growth and yield. How to control pests and damage crops has become a hot topic in botany research. Impact of pests on crops, pests, crops, and environmental factors. From the perspective of environmental factors, we can understand that the temperature and humidity in the environment have a great impact on pests. The temperature in the environment has a great influence on the feed intake of Plutella xylostella. The cabbage caterpillar is one of the main pests of cruciferous vegetables. This article uses the self-reported thermometer and hygrometer to understand the effects of environmental temperature and humidity on cabbage beetles. . Through this example, it is explained that the impact of the natural environment on pests can directly relate to the growth of crops.

The temperature and humidity in the controlled environment were used to understand the development of Pieris rapae through the use of a temperature and humidity auto-detector. It was found that at the same temperature, the developmental duration of Pieris rapae larvae significantly decreased with increasing temperature; at the same temperature, The developmental duration of the increase in humidity also has a tendency to shorten. The relationship between the larval development duration y(d) and the temperature t (°C) and relative humidity x (%) of the cabbage worm larvae can be approximated by the following formula: y=50.8667-1.2893t-0.0615 x.

Changes in temperature and humidity have a great influence on the amount of edible cabbage leaves of cabbage caterpillars. This is also verified by the help of a temperature and humidity self-recording instrument. At the same humidity, the development duration of the larvae of cabbage caterpillars decreases with increasing temperature. The total leaf area gradually decreased. At the same temperature, with the increase of the humidity, on the one hand, the larvae of the cabbage caterpillars slow down due to dehydration on the body surface, and the pressure required to obtain moisture from the food is reduced. By summarizing their relationships and analysis, it was found that the relationship between the total leaf area A (cm2) of the Larvae larvae and the temperature t (°C) and relative humidity x (%) can be expressed by the following formula: A=76.5737-0.8599t-0.1920x . Since the temperature and humidity changes have a certain relationship with the edible area of ​​cabbage caterpillars, does it also have a relationship with the rate of consumption of cabbage caterpillars? Through the use of temperature illuminance recorder to verify the discovery of temperature and humidity and the use of speed there is also a certain relationship. The relationship between the feeding rate v (cm2/d) of the caterpillar larvae and the temperature t (°C) and the relative humidity x (%) can be fitted by the following equation: v=-0.6065+0.1632t-0.0024x.

It can be seen that temperature and humidity have an impact on pests, and a reasonable control of temperature and humidity can, to a large extent, reduce the impact of pests on crops and greatly increase the yield of crops.