What harm does Spodoptera liturae do to sweet potatoes? How to control Spodoptera litura?

First of all, it will make the yield of sweet potatoes lower and lower, and then there will be serious problems with the quality of sweet potatoes, so at this time, we must observe in time, and spray pesticides and fertilizers.

Among them, pests will cause a lot of harm to sweet potatoes, such as causing sweet potatoes to rot or not grow at all, and will eat all the leaves of sweet potatoes, and there is a fence in time to eradicate the surrounding weeds, followed by honey or black light trapping.

It will affect the yield of sweet potatoes, and it will cause some damage to sweet potatoes, and it will also attract some pests and diseases, we should spray some vinegar on sweet potatoes, or spray some pesticides to prevent pests and diseases.

Mosquito killer lamps use black light to kill mosquitoes, which can be divided into three types: electronic mosquito lamps, shop-type mosquito lamps, and air inhalation. Products developed in recent years generate a powerful cyclone through a fan that sucks mosquitoes into the bottom insect net until it dries, creating a mosquito trapping effect. It is a new generation of efficient and environmentally friendly mosquito catching equipment.

The mosquito killer lamp has the characteristics of simple structure, low price, beautiful and generous, small size, and power saving. There is no need to use chemical mosquito repellent substances when using, so it is a more environmentally friendly way to repel mosquitoes. Noctuidae pests mainly include licorice, Spodoptera exigua, Spodoptera exigua, and yellow solitary moth.

Prevention**: The control of Spodoptera exigua and yellow solitary moth can be captured with a black light.

In order to better catch mosquitoes, it is important to remove mosquito lamps regularly, and cleanliness and hygiene. Because mosquitoes usually do not approach when they see the corpse of a colleague. Also, when using mosquito lamps, turn off other indoor lighting.

When the mosquito is disturbed, it cannot feel the light that catches the mosquito lamp, and the effect of catching the mosquito decreases. Similarly, with mosquito lamps used during the day, the effectiveness will decrease. Noctuidae pests are very harmful to crops.

The larvae of noctuidae are large and most of them can be eaten. The larvae of noctuidae mainly damage the leaves of crops, and the newly hatched larvae gather in groups on the back of the leaves, weaving webs on the leaves, picking mesophyll on the leaves, leaving many transparent holes in the skin of the leaves. The larvae of noctuidae pests after 3 years of age can eat in the crevices or holes of the leaves.

In severe cases, only leaf veins and petioles remain, resulting in widespread crop death.

Dilute 5% nail rhinitis goats or non-willow species to 1000 times, mix the spray leaves with 5% mite parasender 750 times dilution to prevent larvae, kill green worms with contact and poisoning to help solve the direct danger, in addition, mites can also kill eggs and reduce indirect damage to egg hatching larvae. Sprinkle 48% chlorpyclosis on the ground, using 200 ml per acre, to prevent ground worm eggs from hatching into larvae and crawling into crop passages. It's something that many people tend to overlook.

Many people think that spraying the leaves is enough, but in fact, in addition to the green worms on the leaves and neck, the soil and roots are important gathering places for the larvae of Spodoptera exigua.

10% methyl filazovir suspension, methyl filamine oil or 2% nail rhinitis microemulsion, 5% mite suspension. If there is already grass eroded by armyworms in the development of traditional Sudanese fields, fertilizer and watering should be sprayed and watered as soon as possible. If you find a bald place in the meadow, you must deal with it promptly and plant it in a place that is bald again.

The purpose of this is to prevent the growth of weeds and provide an environment for armyworms to grow. To catch armyworms, we can use bugs, take advantage of the special light characteristics, and set up large lamps within a certain range to attract armyworms and kill pesticides.

It affects the yield of broccoli, also affects the quality of broccoli, and affects the growth of broccoli, which can damage the fruit of broccoli and affect the appearance of broccoli. Use some pesticides that specialize in Spodoptera litura, and spray them regularly.

It may attract some pests and diseases to broccoli, and the branches and leaves of broccoli will be particularly wilted, and the yield will be reduced.

It is a pest, so it will lead to the destruction of the broccoli planting environment, and it will also affect the amount produced, so at this time you must water more and then use some organic fertilizer.

diseases, among which the diseases that are most likely to cause serious damage are virus diseases, black spot diseases, and soft rot. Common and serious insect pests include red spiders, sweet potato moths, sweet potato wheat moths, nematodes, grubs, ground tigers, etc. There are pests and diseases of the long holiday.

Viral diseases, leaf spots. Sweet potato blast sweet potato vine cutting disease, sweet potato soft rot, etc. To prevent pests and diseases of sweet potatoes, the first thing to do is to do it.

Sterilization of the land before planting. Remove all the land, hidden pests and diseases. This is very simple and edible, resulting in a reduction in production and a loss of harvest.

In production, the following methods can be taken in time to prevent poisoning and improve the yield and quality. 1.During the rapid expansion of sweet potatoes, the roots are drenched with 25 30 times superphosphate mixed with dry and pure plant ash every 10 15 days.

<> control method of hollow insect: mainly in the peak period of adult insects, spray 1000-2000 times of 90% crystal trichlorfon liquid!

Leaf roller control method: when the larvae have harmful signs, spray with 40% fast-acting phosphosphomilk 1500 to 2000 times spray, which can achieve the effect of egg and insect treatment!

The diseased potatoes are soft and watery in the early stage, and they are not easy to pick up by hand. In the middle stage, the soft rot area is water-stained and expanded, and there is rotten juice flowing out, exuding an aromatic wine smell, and in the later stage, large mold hairs grow on the surface, about 2 or 3 days, all of them rot and emit a foul smell.

Hollow worms generally occur in 2-3 generations a year in southern regions. Adults bite tender stems and petioles, and larvae enter the potato vines, except for the seedlings damaged from May to June, and August to October is the re-damage period. As a result, the leaves of some sweet potatoes have been bitten into small holes, the leaf margins have been bitten into notches, and the leaf vein protrusions on the back of the leaves are edible, resulting in yield reduction and harvest loss.

In production, the following methods can be taken in time to prevent poisoning and improve the yield and quality. Sweet potato is a kind of food with high protein content and very rich nutrition, which is deeply loved by the people and has been planted in many places in China. Like many crops, sweet potato cultivation requires attention to pest and disease control.

1. Spodoptera exigua, which occurs in 2 generations every year, overwinters in the earthen chamber with pupa.

2. Spodoptera exigua, which overwinters in mid-July, pupa and turns into adults. Adults lay eggs on the dorsal side of the host's tender leaves and are single-yielding. The larvae are black at the first hatch, and the patterns are gradually obvious after the third instar, and the larvae are very active.

The main underground pests of sweet potatoes are soil-borne pests caused by continuous cropping. The eggs of this underground pest hide in the soil for overwintering and become active when the temperature rises.

There are many reasons, the biggest reason is that the eggs of these pests are overwintered in the ground, and the conditions are suitable for a large number of outbreaks and insect pests, and the biggest mistake is to spray pesticides as soon as possible, and it is best to kill them within a week after the larvae break the eggs.