What are the control methods for mango weevil disease?
How to best control mango weevil disease? Please introduce. Mango weevil disease can be controlled by referring to the following methods: 1. The mango leaf-cutting weevil is widely distributed; adults feed on young mango leaves, causing the leaves to dry up; or females lay eggs on young leaves and bite the young leaves off from the base, affecting plant growth. Control methods: (1) During...
How to best control mango weevil disease? Please introduce
Mango weevil disease can be controlled by referring to the following methods:
1. The mango leaf-cutting weevil is widely distributed; adults feed on young mango leaves, causing the leaves to dry up; or females lay eggs on young leaves and bite the young leaves off from the base, affecting plant growth. Control methods:
(1) During the growth period of young shoots, pick up the bitten-off fallen leaves from affected plants once every 3 days, dry them in the sun and burn them to kill the larvae;
(2) During the growth period of young shoots, spray once every 7 days; 40% dimethoate emulsifiable concentrate at 1500 times dilution, 90% trichlorfon at 1000 times dilution, 25% bisultap at 500-800 times dilution and 2.5% deltamethrin at 2004-3000 times dilution are all suitable.
2. The fruit mango weevil and the flesh mango weevil. The former is a small beetle, about 7 mm long, black. Its larvae bore into and feed on mango seeds, affecting fruit quality; the flesh mango weevil is a smaller yellowish-brown small beetle than the fruit mango weevil, and its larvae mine the flesh, forming tunnels filled with insect frass, making the fruit unfit to eat. These two insects mainly occur in Yunnan, Vietnam, Cambodia and as far as Indonesia, and are quarantine pests. However, it has been reported that in recent years this insect has been found in the border area between Guangxi and Yunnan. Because these two insects cause serious damage but occur only in limited areas, quarantine must be strengthened to prevent their spread to new areas. In recent years, the practice of transporting large quantities of mangoes from Vietnam through non-official channels without quarantine is dangerous.
Control methods:
(1) In areas where this insect has not been found, strictly enforce the quarantine system and strictly prevent its spread to new areas;
(2) In pest-infested areas, maintain good orchard sanitation, promptly pick up fallen fruit and poison them in a centralized manner;
(3) In autumn and winter, combine clearing the orchard with removing all weeds, plough carefully and deeply, and eliminate pests overwintering in cracks in the soil layer;
(4) During the young fruit stage 30-45 days after flower drop, spray the tree canopy with a mixture of dimethoate, trichlorfon and water at 1:1:1500, spraying once every 7-10 days, for 3-4 consecutive times, which can achieve significant control effects.
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