Water spinach is a kind of vegetable that is common in life. What should I do if the growers are troubled by the lack of spinach? Deficiency is one of the main physiological diseases of water spinach. The deficiency of water spinach will undoubtedly have an adverse effect on the cultivation of water spinach. So, what should farmers do in the face of the deficiency of spinach and the common pest infestation? Let's take a look at the small series of the popular agricultural investment network.
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The symptoms of the lack of nutrients in the spinach are yellow, slow growth, small leaves, not easy to turn green, but the veins are still green, the leaves of the old leaves are easy to curl, the stems are small, the roots are underdeveloped, and begin to weaken.
The disease conditions are single and cannot meet the growth demand, continuous rain or drought.
Prevention and treatment methods pay attention to fertilization habits, supplement trace elements and organic matter; when physiological diseases occur, can be sprayed with seaweed + micro-fertilizer.
The harm characteristics of the spinach pests are adults, eggs, larvae and pupa. The larvae feed leaves, flower buds, flowers and fruits can be inserted into the leaves and heart leaves on cabbage and cabbage, and excretion of feces, causing pollution and decay.
Control methods (1) Clear the weeds in the field in time, and take measures such as autumn and winter ploughing to eliminate wintering mites.
(2) Pay attention to timely removal of egg fragments and damaged leaves in the field.
(3) trapping adult insects: the proportion of sugar, vinegar, wine, and water in the adult period is 3:4:1:2, and a small amount is suitable for trapping adult insects.
(4) It is advisable to carry out chemical control when larvae of 1st to 2nd instars are inhabited.
A, 5% inhibition Taibao emulsifiable concentrate 4000 times solution;
B, or 5% agricultural dream emulsifiable concentrate 4000 times liquid;
C, or 20% Diflubenzuron No. 1 suspension agent 500 ~ 1000 times solution;
D, or 25% Diflubenzuron No. 3 suspension agent 500 ~ 1000 times solution;
E, or 40% chrysanthemum emulsifiable concentrate 2000 ~ 3000 times liquid;
F, or 40% chrysanthemum EC 2000-3000 times liquid;
G, or 20% fenvalerate 2000 ~ 4000 times liquid;
H, or artemisinin insecticide 500 times solution.
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