The control of soil temperature and humidity can prevent the root-knot nematode infection of the southern root-knot nematode, which mainly damages the roots of various vegetables. The upper part of the diseased plant growth is short, slow, and has abnormal leaf color. The result is less, the yield is low, and even the plant will die prematurely. Root-knot nematode-infected crops can cause a 10% to 30% yield loss, and up to 50% more. The nematodes that cause damage to vegetables are mainly root-knot nematodes, peanut root-knot nematodes, northern root-knot nematodes, and southern root-knot nematodes. It often harms more than 30 kinds of vegetables such as melons, solanes, beans, radishes, radishes, lettuce and cabbage. Soil temperature and humidity are the most important factors affecting the growth and development of root-knot nematodes. Therefore, in the process of planting, temperature and humidity recorders are used to perform temperature and humidity detection on the soil environment for prevention.
By using tomato as the experimental object and using a temperature and humidity recorder to control the temperature and humidity in the soil environment, it was found that the soil temperature and humidity had a great influence on the ability of the southern root-knot nematode to infect tomato roots. Through the use of a temperature and humidity recorder for multiple monitoring of temperature and humidity to understand the effects of different temperature and humidity on Meloidogyne incognita, it was found that the second instar larvae of Meloidogyne incognita are lost after soil temperature treatment at 42°C and -15°C for 3 days. The dyeing ability and inhibition effect were the best, and the inhibition effect at 0°C treatment was the second, and the control at 22°C had no effect on the infestation ability of the second instar larvae. The second-instar larvae had the best inhibitory effect when the soil moisture content was 20.7%-36.2%, followed by 38.9%-40%. The difference was not significant. The soil water content was 10.2%～ At 31.5%, the second-instar larvae had a strong infectivity, and the temperature in the greenhouse at that time was between 18.7°C and 32.2°C. It indicated that the higher soil moisture content was not conducive to the infection of the second-instar larvae of Meloidogyne incognita, and the lower soil moisture content was beneficial to its infection. In terms of soil temperature, ambient temperature has strong ability to root knot nematodes, and low temperature and high temperature have certain restrictions on the virus's infectivity. Therefore, certain measures can be adopted to regulate soil in the process of planting. Moisture and temperature changes, temperature and humidity monitoring using temperature and humidity recorder for rapid monitoring, in order to avoid the impact of southern root-knot nematode on crop yield.
By using tomato as the experimental object and using a temperature and humidity recorder to control the temperature and humidity in the soil environment, it was found that the soil temperature and humidity had a great influence on the ability of the southern root-knot nematode to infect tomato roots. Through the use of a temperature and humidity recorder for multiple monitoring of temperature and humidity to understand the effects of different temperature and humidity on Meloidogyne incognita, it was found that the second instar larvae of Meloidogyne incognita are lost after soil temperature treatment at 42°C and -15°C for 3 days. The dyeing ability and inhibition effect were the best, and the inhibition effect at 0°C treatment was the second, and the control at 22°C had no effect on the infestation ability of the second instar larvae. The second-instar larvae had the best inhibitory effect when the soil moisture content was 20.7%-36.2%, followed by 38.9%-40%. The difference was not significant. The soil water content was 10.2%～ At 31.5%, the second-instar larvae had a strong infectivity, and the temperature in the greenhouse at that time was between 18.7°C and 32.2°C. It indicated that the higher soil moisture content was not conducive to the infection of the second-instar larvae of Meloidogyne incognita, and the lower soil moisture content was beneficial to its infection. In terms of soil temperature, ambient temperature has strong ability to root knot nematodes, and low temperature and high temperature have certain restrictions on the virus's infectivity. Therefore, certain measures can be adopted to regulate soil in the process of planting. Moisture and temperature changes, temperature and humidity monitoring using temperature and humidity recorder for rapid monitoring, in order to avoid the impact of southern root-knot nematode on crop yield.