Most of the guava fruits have insects after the harvest, what causes them?

This is because the pomegranate is not protected against disinfection when it bears fruit. So a lot of insects went to eat pomegranate fruit. As a result, the pomegranate was infested at the end.

The reason is that the harvest is not harvested in time, and the sweet fruit attracts a large number of insects to come and taste it.

Guava fruit trees are suitable for tropical climates, are afraid of frost, and have general temperatures.

At 1 -2 o'clock, the young tree will freeze to death, and it is suitable to grow at a temperature of 15 or more. The soil requirements are not strict, sandy loam, yellow clay can be planted. Guava is a highly adaptable tropical fruit tree, and the insect pests of guava mainly include aphids and scale insects.

Wood moths, beetles, fruit flies.

Among them, fruit flies harm fruits, easily cause fruit rot, and can survive in fruits. Female flies prefer to lay eggs on near-ripe fruits, and the hatching larvae burrow into the pulp.

<> the soil was treated with 25% parathion microcapsules or phosphine.

Add 50 times of water to the microcapsules and spray them evenly on the canopy.

or add 5 times of water to the above-mentioned agent and mix 250 times of fine soil, and evenly sprinkle the poisonous soil under the canopy, which can achieve certain control effects. In the young fruit stage of pomegranate, the main pests and diseases that need to be controlled are hemp skin disease and cotton bollworm.

Scale insects, etc., can be used for the prevention and control of hemp skin disease in the young fruit stage. In early June of each year, it is also the germination stage of the first generation of larvae.

Pomegranate is very easy to have insects, and the pomegranate shell is very thick, it is not visible from the outside, if you want to prevent insects, first of all, the orchard must be cleaned up, not overgrown with weeds, so that there are fewer insect eggs, and then you can spray insect repellent when the pomegranate blooms to set fruit, (1) combined with winter pruning, the branches and leaves with insect pests, and the fallen fruits are removed in time for destruction. (2) During the period from the end of flowering to the expansion of the fruit, dip the absorbent cotton into trichlorfon.

1000 times the solution, stuffed into the sepal tube of the pomegranate.

Trapping and killing adults, using adult tropism, setting up black lights in the park.

Sweet and sour liquid traps to kill adults, spraying to treat insects, in the peak period of adult oviposition is timely spraying, to prevent larvae from eating fruits, the agent can be selected %20 to kill pyrethrin 2500 times, 50% phosphine 1000 times, 25% chlorpyramide 1500 to 2500 times, etc. The old method was to seal the pomegranate mouth with medicinal cotton. If it is not an old pomegranate area, there are few pests and diseases, this method is okay.

If there are more pests and diseases, then the pomegranate should be bagged and the loss will be less.

At the peak of the emergence of overwintering larvae, soil is laid or mulched under the canopy. Prevent larvae from emerging and emerging into adults. The soil was treated with chemicals, and 25% parathion microcapsules or phosphine microcapsules were evenly sprayed under the canopy with water 50 times.

Before the larvae emerge, fruit bagging is carried out in May to reduce their damage.

At this time, what should be done is to spray a large number of pesticides, so that it can be cleaned up in time in this area, and will not cause too much damage to itself, and can also avoid a decline in production.

After the guava is planted, there are insects in it, in fact, we should kill the insects when he grows to avoid the causes of insects in it, and we can also find out the reasons for the topography to avoid the effect of insects in it.

Choose different propagation methods, and the time to propagate seedlings is also different. If sowing is chosen, it is generally carried out in March. If the rhizome is selected for propagation, it is generally chosen to be carried out in November.

Before the fruit ripens, spray 50% malathion or 90% trichlorfon 800 times solution 1 2 times on the guava plant and surrounding plants; When the fruit is close to maturity, spray sulfacarb or kung fu and other agents once a week, which can effectively prevent and control.

2.Aphids mainly harm young stems and leaves, spraying aphid lice net or kung fu, enemy killing and other control. Scale insects suck the juice of branches, leaves and fruits, and spray chlorpyrifos and other controls. Wood codling moths and longhorn beetles harm the branches, spray dichlorvos or inject liquid medicine into the cave to prevent and control.

Guava leaf blight, guava pseudocercaria brown spot, sunfruit disease, root-knot nematode disease. These are the most common pests and diseases, and it is important to prevent them in advance.

Guava will have common pests and diseases such as leaf blight, nematode disease, sunfruit disease, pseudocercaria brown spot, and other pests and diseases in the planting of guava.

Leaf blight mainly affects guava leaves, producing brown irregular patches on the leaves in the early stage and gradually turning light brown in the middle and late stages. Pseudocercaria brown spot is mainly harmful to the leaf fruit of guava, the leaf will produce brown irregular patches with inconspicuous edges, and the back of the leaf will produce gray mold.

Some guava in bai

There are insects on the surface, and this is because of this

It is a fly-like insect that lays its DAO eggs in some fruits, and eats fruits when it grows into small worms (much like maggots). They reproduce very quickly and they like a lot of fruits.

Guava: native to South America, cultivated throughout South China, Myrtaceae tree, up to 13 meters high; The bark is smooth, gray, flaky, flaky; The shoots are ridged and hairy. Leaves leathery, oblong to elliptic, apex acute or obtuse, base nearly rounded, slightly rough above, hairy below, often sunken, veins distinct; calyx bell-shaped, hairy, calyx cap nearly rounded, irregularly delobed; White; The ovary is inferior, conjugated with the calyx, and the columella is the same length as the stamens.

The berries are globous, oval or pear-shaped, with sepals at the apex, white and yellow flesh, placenta hypertrophied, fleshy, pale red.

Growth habits: Born on heath or low hills; Suitable for tropical climate, afraid of frost, the general temperature is -1 -2, young trees will freeze to death. The average summer temperature should be above 15.

The soil requirements are not strict, and it is better to cultivate and grow in well-drained sandy loam and clay loam soil.

Planting technique: propagation by sowing seeds and cuttings. Sowing, when the seeds are mature and picked immediately after sowing, sowing or strip sowing, after 2 4 weeks of seedlings, to be transplanted once the seedling height of 3 4 inches, if the growth is good, one year after sowing can be planted.

Propagation by cuttings, every year in February and April, cut strong and full branches, about 1 foot long, inserted into the soil, the depth is half the length of the branches. Keep the soil moist often, and it can be planted around Qingming in the second year. Root insertion can also be used.

The control methods for pests in guava fruit are:

1. In the peak period of overwintering larvae, soil or mulch film should be covered under the canopy. Prevent larvae from emerging and emerging into adults. Overwintering larvae are generally excavated from mid-June to early July, sometimes for two months, and the soil moisture content reaches more than 10% after rain, and is delayed during droughts.

2. To treat the soil with the agent, spray it evenly under the crown with 25% parathion microcapsules or phosphine microcapsules with 50 times of water, or add 5 times of water to mix 250 times of fine soil with the above agents, and evenly sprinkle the poisonous soil under the canopy, which can achieve certain control effects.

3. Before the larvae are unearthed, the fruit is bagged in May to reduce its damage.

4. When the egg fruit rate reaches 1% 2%, pesticide control is carried out on the tree. Commonly used agents and concentrations of 10% Uranus 2500 3000 times liquid, 30% Tao Xiaoling 1500 2000 times liquid, 20% 2000 2500 times liquid, Avizo 2500 3000 times liquid, etc. At the same time, the addition of pesticide additives has a more obvious control effect.

5. Pay attention to the prevention and control of fruit piles and other trees (such as jujube trees) near the pear orchard.

The white bugs that cause the guava fruit you grow are the fruit flies. Female.

Flies like to lay eggs on near-ripe fruits, and the hatched larvae burrow into the flesh of the fruit to feed, causing partial or extensive rot of the fruit. Control method: Before the fruit is ripe, spray 50 malathion or 90 trichlorfon 800 times in the orchard, or 25 1000 times the fast killing solution, alternate 1 2 times, spray 1 time every 10 days.

When the orchard is close to maturity, spray 1500 times of 24 brackish water agent or 2500 times of good green microemulsion in the orchard once a week, and stop using the drug 7 days before harvest. In addition, if conditions permit, varieties with larger fruits can consider spraying insecticides and fungicides once before the fruit is ripe, and then adopt fruit bagging measures. The bag can be made by yourself with non-woven fabric and white paper, and you can also buy fruit bags for goods.

Spray pesticides on insects, and you can kill pests with ordinary medicines.

What kind of bug? Different insects have different control methods.

That's a fruit fly, or a maggot of a fruit fly.

Fruit flies are also called fruit flies, melon fruit flies, orange fruit flies, and needle bees. It's annoying anyway! The melons and fruits are only green and astringent, and there are fruit flies standing on their heads!

It doesn't matter if you play, the melon fruit fly just injects "worm eggs" into the melon fruit, and when the melon fruit is about to ripen, the fly maggots inside will grow up, resulting in rotting and falling fruit, and the melon and fruit farmers will suffer heavy losses or even no harvest, but they are helpless!

Answer: there is no way to have worms in the guava fruit, it is best to use the method of bagging when the fruit grows, only the bagging can better prevent flying insects from flying to the fruit to lay eggs and form small worms into the fruit.