First, mango striped tail moth
Generations overlap, and larvae and pupae overwinter in rotten wood or bark of mango. In the following year, the adults emerged one after another, and the phototaxis and chemotaxis were weak. Mating and spawning at night are mostly on the leaves of old branches or on branches and flower reefs.
Harmful symptoms: Larvae will damage the leaves, twigs and main spikes of mango, causing the top of the tree to wither and fall leaves, seriously affecting the normal growth, flowering and development of the plant, and leading to a decline in fruit yield.
Prevention and control methods: cut off dead branches and burn them. Brush bark cracks in winter, and coat trunk and main branches with 3: 10 limewater. Spraying when the fruit tips or leaf tips germinate and bloom, once every 10 day, and spraying continuously for 3-4 times until the ear length is about 20cm. The pesticide can be 500-800 times of 90% dichlorvos, 80% dichlorvos 1000 times, 0.2% carbaryl, 2.5% mirex 1000 times and 20% mirex 1000 times.
Second, mango leaves are twisted.
At night, it will enter the mating peak, and the eggs will be scattered on the back of the tender leaves. Larvae feed on mesophyll. As the larvae grow up, they will produce small tumor-like galls, which will split the central part of the leaves and form perforations. When the larvae mature, they will pupate in the soil.
Harmful symptoms: it mainly harms leaves, each leaf has dozens of galls, and the damaged leaves appear a lot of perforation or irregular network rupture, which affects photosynthesis, greatly affects the quality of new shoots, and often causes poor crown growth, affecting tree potential and yield.
Prevention and control methods: pay attention to pruning and shaping, keep good ventilation and light transmission, clear the garden and loosen the soil in time, and destroy its pupation site. When the shoots and leaves germinate, 20% metoclopramide, 65,438+00% Anlubao, 2.5% chlorhexidine are 65,438+0,000 times, 40% dimethoate and 90% trichlorfon are 800 times and 765,438+00 days respectively. In severe cases, 3% methyl isofenphos or 5% phoxim should be combined with soil.
Three, mango leaf-cutting weevil
Adults live longer and generations overlap. After overwintering in soil, mature larvae pupate and emerge, adults feed on young leaves and mesophyll, and give birth in veins after mating. After the egg leaves fall to the ground, the larvae hatch, feed on the mesophyll and pupate in the soil. Soil water content will have a great influence on the growth and development of insect pupae, and lower than 10% or higher than 20% will lead to early sudden death.
Harmful symptoms: This insect is one of the main leaf-eating pests of mango. Adults eat the upper epidermis of tender leaves, and the food is almost round, leaving only the transparent lower epidermis, which causes the leaves to shrink or even dry up. After the female adult lays eggs on the tender leaves, the leaves near the base of 1/4- 13 are cut off, so that the part with eggs falls to the ground, causing slight appearance and seriously affecting the tree potential.
Control method: combine weeding, fertilization, controlling winter shoots and loosening soil to destroy pupation sites. Clean and burn the tender leaves bitten from the ground in time to eliminate eggs and larvae. Spraying 90% Baichong 800 times solution, 80% dichlorvos +40% dimethoate 1000 times solution or 2.5% miesha+metoclopramide 1000 times solution at the germination stage. Spray for 7 days 1 time, and spray continuously for 2-3 times;
Four, mango flatbilled sawfly
Adults mostly live on the back of leaves or branches, and crawl or jump quickly after being disturbed. The mating and spawning methods are repeatedly dispersed, and a single egg will be produced in the vein tissue, bud bracts, pedicels, shoots and young leaves of mango flowers. The hatching rate can be as high as 100% only when the white cotton wadding bundle is exposed at the top. If the nymph is peeled for 4 times, the first instar larvae will be clustered. Adults and nymphs prefer to choose the shoots of mango trees for long-term feeding, and they are distributed in the core.
Harmful symptoms: Adults and nymphs harm the ear, twigs and leaves of mango trees, which will dry up and fall off in severe cases. The insect also secretes honey, causing bituminous coal disease, blackening the surfaces of branches, leaves and fruits, and affecting plant growth and fruit quality.
Prevention methods: reasonable close planting and pruning to reduce its parasitic sites. Spray 2-3 times in spring when the bud first blooms, and then spray 1 time in fruit-setting period and winter, and pay attention to the distribution area of adult core when spraying. The available pesticides are 209 cicada powder 2000 times, 80% dichlorvos 1000 times, 25% dimehypo 1000 times and 40% dimethoate 1000 times.
Five, mango white moth wax cicada
Adults overwinter in the branches and leaves. When the environment is suitable every year, mating begins to lay eggs, and the eggs are concentrated in tender or petiole tissues, forming rectangular egg blocks. The nymphs of the first egg are clustered, and the adults will hide for the winter after they appear. The insect is not tolerant to low temperature, and it is easy to die when the temperature is lower than 10℃.
Harmful symptoms: the insect mainly harms branches and twigs with adults and nymphs, and sucks juice. When adults lay eggs, they stab branches to make them dry, which leads to fruit dropping and poor fruit quality. Its excrement can cause soot disease, affect the growth and development of fruit trees, and reduce the commercial value of fruits.
Prevention and control methods: reasonable pruning, so that the crown is ventilated and transparent. Cut off branches and burn them with eggs. Spraying 80% dichlorvos and 40% dimethoate 1000 times solution, or 90% Dunbaichong 800 times solution and 0.2% washing powder, or 20% methomyl 2000 times solution and 80% dichlorvos 1000 times solution at adult stage, early spawning stage and juvenile stage.
Six, mango longicorn beetle
Adults often lay eggs in the fractures or gaps at the proximal end of young branches, and single hatched larvae drill into the pulp of branches to feed. The tunnel is simple, round from top to bottom, and white glue often accumulates at the end of the tunnel. Larvae of vibrating branches can move up or down quickly, and there are excrement discharge holes at a certain distance outside the damaged branches, so that insect excrement becomes thick black liquid and is discharged from the excrement discharge holes. When the larvae mature, they pupate in the tunnel, supplemented by young shoots and tender cypress bark, which is suitable for outbreaks in the middle of each year.
Harmful symptoms: Larvae feed on branches of mango, cashew and other fruit trees, usually invade from young branches and gradually feed on big branches and trunks, which seriously affects the growth potential of the plant and eventually leads to the death of the whole plant.
Prevention and control methods: At the peak of adult emergence, install black light to trap and kill. In the larval damage period or winter, the damaged branches are cut and burned. When penetrating the wormhole with thin steel wire, fill 80% dichlorvos or 40‰ dimethoate with cotton or waste paper, or inject the liquid medicine into the wormhole with a syringe and seal it with soil.
Seven, mango fruit moth
Adults hide in the shade of bushes near orchards during the day and fly out at night. Weak phototaxis, strong chemotaxis, like glycolysis. Such as loquat, bayberry, peach, plum, mango, wampee and early-maturing citrus varieties, will be harmed. The late period of each year is the peak period, which rages in the windless and sultry night. It is polyphagous, and can use a variety of wild flowers and fruits as honey sources to supplement nutrition. Larvae mostly feed on the back of leaves, turn white and hide at night, and stop activities when the temperature is lower than 10℃ or the wind force is above 4.
Harmful symptoms: Fruit-sucking Noctuidae comes out at night, dressed in white, and sucks the juice of the maturing fruit with sharp mouthparts, causing the fruit to rot and fall off. When sucking the juice, first stretch out its siphon and search for the fruit surface. After finding a suitable position, fix the tip of the mouthparts on the peel and swing it from side to side. After a few minutes, its mouthparts can pierce the pulp to eat. Feeding time varies from a few minutes to dozens of minutes, so that the internal tissues of the fruit are destroyed, gradually rotted or even shed. There is a thorn hole in the back of the fruit-sucking moth. The diameter of puncture holes inside and outside epidermis is basically similar, which is obviously different from mechanical trauma.
Prevention and control methods: remove shrubs and weeds near the orchard. Adults are in full bloom and killed in the orchard with lanterns at night. Use 750g of brown sugar, 500g of red wine, 250g of rotten fruit juice and 3000g of water, pour 80% of bamboo tubes with the height of 10cm, hang them on trees to trap and kill dead insects, and add 1 time every 5-7 days. Or 50g of brown sugar, 0/00 g of fruit juice/kloc, 50g of arsenic and 5kg of water are used to make sugar juice venom for trapping and killing;
Eight, mango fruit fly
Fruit flies, also known as Bactrocera dorsalis, mainly feed on nectar, dew and rotten fruits. They have no specific area to feed and inhabit, and their normal range of activities is within 2-3 kilometers, and their migration will reach 8 kilometers. After adults mate, young eggs will be laid under the pericarp of mature fruits, and eggs will feed on pulp. Mature larvae and pre-pupae will be buried in the wet soil under the crown and pupated with the rotten fruit falling off. There are two emergence peaks every year, with 6 generations a year, overlapping generations and strong reproductive ability.
Harmful symptoms: Adults lay eggs under the epidermis of mature fruits, and the decay of larvae will make the fruits discolored in pieces, accompanied by rancid juice, resulting in large-scale rot and fruit loss, which is also one of the main causes of diseases.
Prevention and control methods: Because mango, a citrus fruit fly, has obvious taste, pruning, rot removal, soil deep ploughing and fruit bagging are all good agricultural prevention and control methods. You can also use methyl eugenol bottle to trap and kill. Inject the attractant into the incision of the mineral water bottle and hang it in the dark hollow branch of the crown, and hang it 140- 180 per hectare for physical control. Chemical control is an auxiliary measure. Add 10g brown sugar to 800 times of trichlorfon liquid medicine (about 15kg per barrel), mix it with 10g vinegar, spray it on the tree crown to kill adults, and apply quicklime or phoxim for 2-3 times to control the mature larvae under fruit trees.
You got it? All the above are for reference. I hope I can give you some inspiration and help.
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