Control techniques of Strawberry Red Spider in greenhouse
The main pests that harm greenhouse strawberries are red spiders. The prevention and control techniques are: red spiders: red spiders and yellow spiders are the main damage to strawberries, especially red spiders. Small gray spots appeared when the leaves were damaged at the initial stage, and then gradually expanded, so that the whole leaves were covered with white patterns, yellowing and curling, plant dwarfing and wilting, seriously affecting the growth. Use medicament: at the beginning of inflorescence, 0.3 degree stone sulfur mixture can be sprayed and sprayed again every seven days. Before fruit picking, the low residual poison 20% synergistic fenvalerate was sprayed twice at an interval of 5 days. Pay attention to the prohibition of pesticides 2 weeks before fruit harvest.
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Standard and technical specification for pollution-free strawberry production
In early October, powdery mildew of strawberry seedlings in greenhouse has occurred sporadically, the onset time is in advance, the degree of disease is aggravated, and the occurrence area is increasing year by year, which seriously affects the yield, quality and edible safety of strawberries. Growers should strengthen the field management of strawberries, select control agents scientifically, and use comprehensive control measures to control greenhouse grass.
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The two pests of strawberries in the greenhouse should be carefully guarded.
Spiders are important pests in greenhouse and greenhouse cultivation; greenhouse strawberries are easy to suffer from the outbreak of red spiders in the middle and later stage of growth, dwarfing and early senescence of the damaged plants, reddish brown leaves and dry leaves, damaged flowering stage, shrinking hard fruits and increasing abnormal fruits, which seriously affect the yield and quality of fresh strawberry fruits. If the damage is serious, the output can be reduced by 30% to 4%.
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