Picture: how to prevent and cure spinach downy mildew? What kind of medicine should I take?

Spinach is one of the most commonly eaten vegetables. Every time I go to eat hot pot, I will order a portion of spinach and eat it hot. Spinach is quite popular all the year round, and now many farmers generally build greenhouses to grow spinach so that it can be supplied to the market normally. In the planting process, what can not be avoided is spinach downy mildew, so how to prevent the downy mildew encountered? What kind of medicine should I take? The arrangement for you is as follows:

I. introduction of downy mildew of spinach

1. Introduction of symptoms of downy mildew in spinach

First of all, damage to the front of spinach leaves, the disease spot is light yellow, different sizes, the diseased leaves will wither and yellow when drought, when the humidity is high, it will lead to leaf rot, serious leaves turn yellow until withered.

two。 Introduction to the causes of downy mildew in spinach

Spinach plant is not exuberant or planting density is too high, moisture or sowing prematurely will cause downy mildew.

3. Introduction to the incidence conditions of downy mildew in spinach

The pathogen of spinach downy mildew overwintered on spinach, seeds or oospores in overwintering spinach and seeds, and was transmitted by airflow, Rain Water, irrigation water, tillage tools, insects and ploughing operations. repeated infection was carried out under rainy and humid conditions with a temperature of 7-16 degrees.

Second, how to prevent and cure downy mildew of spinach?

If downy mildew occurs in growing spinach every year, it will affect the yield of spinach, which will reduce the income of farmers, so prevention and control is the most important. The prevention and control methods are introduced as follows:

1. Spinach varieties resistant to downy mildew were selected.

two。 Pull out the diseased plants, and find downy mildew plants in the spinach field in early spring, pull them out in time and burn them out of the field.

3. Implement rotation, sow seeds with new high-fat membrane before sowing, sow seeds at the right time, and then spray new high-fat membrane to keep moisture on the surface to improve the rate of seedling emergence.

4. Field management, reasonable close planting, scientific watering, prevent flood irrigation, strengthen ventilation, reduce humidity.

Doing a good job in the prevention and control of the above 4 points will greatly reduce the incidence of downy mildew in spinach.

Third, spinach downy mildew what medicine to play?

Timely spraying Zhuangjianling in the growth stage of spinach can make the plant stem stout, leaf hypertrophy, improve spinach disease resistance, reduce the amount of pesticide and fertilizer, reduce residual poison, and improve the natural taste of spinach.

In the early stage of spinach downy mildew, the wettable powder of Ruidu, methyl topiramate, chlorothalonil, disinfectant alum, metalaxyl manganese zinc, aluminum ethyl phosphate wettable powder, Prike aqueous solution and Shuake suspension can be sprayed. At the beginning of the above-mentioned prescription diseases, they were sprayed once every 6 days for 3 times in a row. It should be noted that spraying medicine needs to be stopped 15 days before spinach harvest. If the disease occurs after growth, it needs to be harvested and listed in time, and there is no need to spray, so that the drug will not be left on spinach, which is harmful to human health.

Conclusion: the above content is about the prevention and treatment of spinach downy mildew, hoping to help growers in need. This paper is integrated with relevant professional knowledge.