During the cultivation of citrus, various kinds of pests and diseases will be encountered. Today, Xiaobian takes everyone to see what pests will be encountered during the growth of citrus. How should we prevent and treat it?
Citrus meal is mainly harmful to spring and summer shoots, causing soot disease, causing the shoots and fruits to grow slowly, causing them to fall off. Control methods: (1) 10 times of rosin mixture after fruit picking; larvae spray 20 times rosin mixture during hatching; spray insects with 80% dimethoate 1,000 times. (2) Killing larvae in the morning. (3) Protect and use natural enemies such as bee stings for biological control.
Size: The larva is harmful to spring and autumn, and eats new leaves. Control methods: (1) 1-2 months and May-June months under the canopy 1-2 inches of surface layer excavation of insects (2) after the rain and early and late killing adults ' (3) larvae spray before 1-3 years old 2,000-6,000 times solution of wormworm plus 2,000 times of washing powder or 250-300 times of lead citrate
The omnivorous pest of the fruit worm is the main pest of citrus ripening. Adults pierced the pericarp to suck the fruit juice. The fruit was punctured, and the surrounding tissues were water-soaked. After the soft rot, they fell off. After the green fruit was damaged, only the scars were seen, and the pricking holes disappeared in the late stage. The prickly hole out of the juice, some of which appear white crystal after drying, the tissue around the surface of the puncture does not change color or water-soaked soft rot. Control methods: (1) Winter clearing garden, destroying its wintering place and intermediate host; (2) Adults during the prosperous period, night lanterns killing trees or hanging fruits around the orchard with melons, or black light to trap adults; (3) ) Cooked sweet potato into a rotten sauce, add water to make a paste (or rotten mandarin juice) after fermentation, add 0.5-1 for each kilogram of wine, 1 bit of trichlorfon or lead citrate, and place it in a porcelain plate at dusk. Garden trapping; (4) picking fruit in advance or replanting late maturing varieties.
The long-necked owl (horn-shouldered owl, big green scorpion), commonly known as the stinky wet fart, belongs to the genus Hemiptera, and is the main pest that damages the fruit. The nymphs are harmful, causing the leaves to be yellow and the branches to dry up; the damaged parts of the fruit become hard and tight, resulting in early fruit drop and reduced quality. Control methods: (1) catching adult insects in the morning (2) picking egg fragments (3) 80% trichlorfon 800-1, 0 times liquid spray, nymph (4) protect parasitic wasps, cockroaches and spiders蚧: The name of the earth is white fly. The newly hatched young cubs are afflicted on both sides of the leaf dorsal veins, and then transferred to the main branches and trunks to induce soot disease, causing defoliation and branching, and the tree is weak; it is the citrus fruit, causing fruit drop. Control methods: (1) Master the spraying of 12-20 times rosin mixture or cotton oil soap 50 times in the initial stage of pests, and spray 2-3 times continuously; (2) stocking natural enemies red ladybugs and Australian ladybugs, every 300-5 100-200 heads of citrus insects can eat their eggs and play the role of biological control (3) clearing the garden in winter, brushing eggs; (4) small occurrences, artificial killing
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