Prevention and control of mango weevil
1. Mango leaf-cut weevil is widely distributed, adults feed on mango tender leaves, causing the leaves to dry up, or females lay eggs on the tender leaves and bite off the tender leaves from the base, affecting plant growth. Prevention and control methods:
During the growth of tender shoots, ① picked up the fallen leaves of the injured plants every 3 days, dried them in the sun and burned them, killing the larvae.
② is sprayed every 7 days during the tender shoot growth period, using 1500 times of 40% dimethoate EC, 1000 times of 90% trichlorfon, 500 times of 2.5% dimethoate and 2.5% of dimethoate 20043000 times.
two。 Fruit mango weevil and pulp mango weevil the former is a small beetle, about 7 mm long, black. The larvae eat mango seeds and affect the fruit quality; the flesh mango weevil is a small yellowish-brown beetle smaller than the fruit mango weevil, whose larvae eat the flesh, form tunnels and are filled with insect dung, making the fruit inedible. These two kinds of insects mainly occur in Yunnan, Vietnam, Cambodia and Indonesia and belong to quarantine objects. However, it is reported that this insect has been found in the border area between Guangxi and Yunnan in recent years. As the damage of these two kinds of insects is serious, but they only occur in local areas, quarantine must be strengthened to prevent them from expanding to the new area. In recent years, it is dangerous to import mangoes from Vietnam in large quantities without quarantine.
Prevention and control methods:
① has a strict quarantine system in areas where the bug has not been found, and strictly prevent expansion in the new area.
② does a good job in orchard hygiene in pest-infested areas, picks up fallen fruits in time and concentrates on poisoning.
③ autumn and winter combined with clear garden to get rid of weeds, fine ploughing, removal of overwintering pests in soil cracks.
During the young fruit stage of 30-45 days after flowering, ④ sprayed the crown with the mixture of dimethoate, trichlorfon and water 1-1-1-5, once every 7-10 days, for 3 times in a row.
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How to prevent early flowering of mango by planting mango
Mango is an evergreen fruit tree, which consumes a lot of water and nutrients. In case of long-term dry weather and improper management of water and fertilizer, once the accumulated temperature is satisfied, flower buds differentiate quickly, early flowers will appear and are vulnerable to low temperature and cold weather. Flower organs can not pollinate, fruit setting rate is low, resulting in reduced yield or loss of harvest.
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Control of anthracnose of mango
The main results are as follows: 1. the main damage symptoms are mango flowers, fruits and tender shoots. After the young leaves were infected, there were many round brown spots with yellow halo around them, and gradually expanded into round, polygonal or irregular brown spots, then ruptured and perforated, and the leaves and young fruits were covered by gall midges, leafhoppers, etc.
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