What are the control methods for the main pests and diseases of wampee?
How do you control the main pests and diseases of wampee? Please introduce the main pests and diseases of wampee, which can be controlled by referring to the following methods: 1. Anthracnose. Wampee anthracnose is a common disease in production, and it can be infected at all growth stages. In recent years, it has occurred more severely from June to October. Control methods: use fertilizer and water scientifically to strengthen the tree vigor,...
How do you control the main pests and diseases of wampee? Please introduce
The main pests and diseases of wampee can be controlled by referring to the following methods:
1. Anthracnose
Wampee anthracnose is a common disease in production, and it can be infected at all growth stages. In recent years, it has occurred more severely from June to October. Control methods: use fertilizer and water scientifically to strengthen the tree vigor, and after rain, drain water promptly to prevent infection by pathogens. Keep the orchard clean, promptly prune diseased branches and leaves, and dispose of rotten fruit to reduce overwintering sources of the disease. For chemical control, you can choose 70% thiophanate-methyl wettable powder at 800-1000 times dilution, 50% thiram at 500-600 times dilution, 5% chlorothalonil at 700-1000 times dilution, or 50% carbendazim wettable powder at 500 times dilution.
2. Coffee leopard moth
It often damages new shoots, flower spikes, and fruit clusters. The larvae overwinter inside the damaged branches. In late February of the following year, the overwintering larvae begin to move and feed inside the branches and trunk, and excrement is discharged out of the holes. They pupate from March to May, and adults emerge from April to mid-July. Adults lay eggs from late April to early June, and newly hatched larvae bore into the trunk to cause damage in early May. The peak damage period is from early June to late October. Control methods: patrol the orchard frequently, promptly prune and burn damaged branches, or use wire to kill the larvae and pupae inside the tunnels; inject 80% dichlorvos emulsifiable concentrate at 100 times dilution into the tunnels and seal the holes with clay.
3. White wax cicada
Commonly known as "white chicken." Adults and nymphs often gather on branches, tender shoots, flower spikes, and fruit stalks to suck sap. Control methods: clean the orchard in winter, and combine with pruning to keep the orchard and tree canopy well ventilated and with good light transmission, reducing damage and reducing insect sources; in early to mid-March and mid-to-late July, spray for control at the early stage of adult egg laying and the young nymph stage. You can use 80% dichlorvos emulsifiable concentrate at 800-1000 times dilution, or 90% crystal trichlorfon, 40% dimethoate emulsifiable concentrate, 50% malathion emulsifiable concentrate at 1000 times dilution, or 10% cypermethrin at 2000 times dilution for control.
4. Aphids
The aphids that damage wampee mainly include the citrus aphid, cotton aphid, and spirea aphid. Adults and nymphs gather on buds, tender shoots, tender leaves, flower buds, and young fruit to suck sap. Control methods: combine pruning after fruit harvest with winter orchard cleaning, prune out overwintering eggs and insects, and burn them in a centralized manner; reduce spraying, protect natural enemies, and use natural enemies to reduce damage. When the damage rate on new shoots reaches more than 25%, spray for control. You can use 10% cypermethrin emulsifiable concentrate at 3000 times dilution or 2.5% deltamethrin emulsifiable concentrate at 3000 times dilution to apply to aphid-infested tender shoots for control.
5. Leafminer
Also known as "ghost scribbles." It overwinters as pupae or a few mature larvae in curled leaf edges. In late April of the following year, the overwintering pupae emerge as adults, damage begins in May, and it damages summer and autumn shoots from June to August. Control methods: strengthen agricultural management, control nitrogen fertilizer application, and make new shoots emerge uniformly, which is conducive to concentrated spraying to protect the shoots. Start spraying 5-7 days after new shoots emerge, spray once every 7-10 days, for 1-2 sprays. You can use 2.5% deltamethrin emulsifiable concentrate at 2000-3000 times dilution for control.
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