Prevention and control method of potato late blight

Abstract

The invention provides a prevention and control method of potato late blight, which is used for preventing and controlling potato late blight by comprehensive utilization of the traditional measures. The prevention and control method comprises the aspects of: potato seed treatment before sowing, management at seedling stage, cultivation measures, prediction and pre-warning, chemical control and the like. The prevention and control method is stable and permanent in prevention and control, reduces environmental pollution, is low in cost, and can predict and persistently control, thereby being amethod for realizing comprehensive prevention and control of potato late blight. From the growing conditions of the above-ground parts in field, the purpose of controlling the incidence and prevalence of late blight is achieved by adopting a late blight prediction and pre-warning system to instruct the chemical control on the field late blight. By adopting the prevention and control method, the disease plants are few, the yield is increased and is 25.7-45.8% higher than that of common planting, and the chemical spraying frequency is simultaneously reduced.

Description

technical field [0001] The invention relates to the technical field of potato pathogen control, in particular to a control method for potato late blight. [0002] Background technique [0003] Potato late blight (Potato Late Bright) is caused by Phytophthora infestans, a devastating fungal disease that causes potato stem and leaf death and tuber rot. The pathogen overwinters mainly as mycelium in potato cubes. Sowing fungus-infected potato pieces will result in no germination or death after germination. Some become central diseased plants after unearthed. The spread expands. The sporangia on the diseased leaves can also infiltrate into the soil with rainwater or irrigation water to infect the tubers, forming diseased tubers and becoming the main source of infection in the following year. [0004] In recent years, potato late blight ranks first in the world's crop diseases in terms of losses (10%-40%) and chemical control costs that exceed those of rice blast and stri...

AI Technical Summary

Problems solved by technology

However, this pretreatment cannot ensure that the drug is evenly treated on the seed potatoes, and the drug effect can only be maintained for a period of time

In addition, during the growth period, the disease is not controlled because the primary infection of the spores of the exotic bacteria still exists

Delayed sowing is obviously affected by the climate. When the climate changes, the desired effect may not be achieved, and the control effect is unstable.

These two treatments are basically relatively simple to prevent or control potato late blight from a certain link. If the operation is wrong, it will be difficult to recover the damage caused by late blight

Images