What effect does climate have on wheat pests and diseases?

Since the winter in the north in 2013, the continuous high temperature and dry weather have been very beneficial to the occurrence of wheat diseases and insect pests. At present, wheat pests have occurred in some areas such as Henan. Despite the recent decline in temperature, precipitation is still small. Industry experts said that we must always be vigilant against the continued warm winter and dry weather to prevent the occurrence of wheat pests and diseases.

According to the results of the survey, the drought and warm winter in the north have little effect on the occurrence of pests and diseases, some aphids and sheath blight occur, and only some areas of red spiders occur more seriously. At present, wheat is in the wintering period, and it is a critical period after the beginning of March. If the drought continues, the temperature will be high, which will be very beneficial to the occurrence of insect pests.

Feng Zhijie, the station manager of the Xinxiang City Plant Protection Station, believes that although the climate has little effect on wheat pests and diseases, it cannot be relaxed. He told reporters that the precipitation in the northern part of the country is generally small this winter. The temperature in the previous period is also higher than in previous years, which will have a certain impact on the occurrence of wheat diseases and insect pests, but the impact is not significant. Through the recent investigation in the wheat field, due to the large local planting density, wheat sheath blight is more serious. At present, the incidence of sheath blight in Xinxiang City has been 5% to 10%. In some areas, insects have occurred, mainly wheat red spiders. If the drought is long, and the temperature is right, it is very beneficial to the occurrence of pests. Although the temperature has decreased recently, there is not much precipitation and the weather is uncertain in the future, so be vigilant at all times.

Jiao Dongyue, director of the marketing department of Shandong Heyi Biotechnology Co., Ltd. believes that after March 20, if the drought and high temperature continue, wheat aphids and wheat red spiders will occur. Both can cause yellowing of wheat leaves and stagnant growth. For two consecutive years, the early red spiders in Shanxi and Henan provinces have a high incidence of drought. Many farmers think that the drought is not long due to drought. Therefore, in order to avoid wheat production, it is necessary to use drugs in time. In March, you can choose chemical control, pay attention to the amount of water spray must be large to improve the humidity of the field, while reducing the occurrence of wheat spiders. In addition, the mites can spread the virus, which will cause the wheat to be infected with dwarf yellow strip disease, and it is necessary to prevent it in time.

What effect does climate have on wheat pests and diseases? Researcher Cao Yucheng of the Institute of Plant Protection of the Chinese Academy of Agricultural Sciences said that the current wheat pests are mainly wheat borers, midges, and red spiders. The occurrence of red spiders in previous years was not serious, due to the recent north In the continuous drought, the occurrence of red spiders is more serious. At present, the drought and high temperature weather have little effect on other pests. The control of red spiders in the seedling stage should be strengthened, and it is better to control. After the wheat seedlings return to green, spray chemical agents. Drought has little effect on the occurrence of diseases, because the disease needs to have certain humidity requirements. However, wheat virus disease is transmitted by mites, so it is necessary to guard against the occurrence of worms in the prevention and treatment of viral diseases.

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