The longan seaweed moth is a dried moth pest. Nowadays, the dragon's eye is constantly pumping autumn shoots. The young shoots of longan are highly susceptible to the sea wheat moth. Adults lay eggs on the young autumn shoots, and soon hatch larvae, the larvae moth into the interior of the autumn shoots as a pest, so that the autumn shoots grow slowly, resulting in distortion, deformity, can not become excellent fruit of the mother branch, but also spread the longan broom disease, affecting the tree potential and the following year flowering fruit. Therefore, longan should beware of the sea wheat moth during the autumn shoots.
Prevention and control methods:
1: When the longan is in autumn, spray with 5% kung fu emulsion 2000 times liquid + foliar fertilizer Youcense (15-15-15) 1000 ~ 2000 times liquid mixed with spray prevention.
2: When spreading leaves in the autumn shoots of the longan, use 10% A dimension. Chlorpyrifos 1000 times liquid + brassicalin + amino acids mixed spray control.
3: When the longan autumn shoots turn green and completely turn green, spray once each with 48% chlorpyrifos 1500 times liquid + brassicain + high-purity potassium dihydrogen phosphate.
After such a drug, its effect is not bad. It can increase the medicinal effect, strengthen the nutrients needed to supplement fruit trees, accelerate the ripening of autumn shoots, promote the strength of autumn shoots, improve the ability of trees to expand diseases and insects and the quality of fruiting mother branches, which is conducive to flowering and fruiting next year.
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