(1) Clean up the Huanglong disease plant in time. The whole park sprays the tree guards to disinfect and sterilize, reducing the source of the disease and the source of the insects.

(2) The main pests and diseases that harm citrus during the flower bud stage and young fruit stage are:

1 Flower buds: When the flower buds start to turn from green to white, the adult feathers are unearthed 5 to 7 days before, and 1.25 kilograms of diazinon and 15 kilograms of fine soil are evenly mixed and sprinkled on the tree plate and 50 cm above the tree plate. Prevent adult worms from being unearthed; use canopy spray with 90% trichlorfon 800 times and 2.5% deltamethrin 2500 times to kill unearthed adults; and timely remove the buds.

2 whitefly: pay attention to the change of insects in mid-April, and apply the medicine in time after the first generation of emergence and mating, twice in a row, once every 7 days. The drug can be used as a 10% hero, 2000 times, and 25%.

3 anthracnose, scab: in the spring shoot 1 ~ 2 cm, Xiehua 2 / 3 each spray a drug to protect the spring shoots and young fruit, 0.3% ~ 0.5% Bordeaux mixture, 50% thiophanate WP 600 ~ 800 times liquid. 4 Pay attention to the prevention and control of citrus red spider to prevent the insect from happening. When the drug is controlled, it is necessary to add an appropriate amount of new high-fat film to improve the efficacy.

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