Clover is sick!!!

It means that happiness is about to leave you.

For many reasons, there are 1 1 typical diseases of clover, 4 2 kinds of harmful insects, and 6 kinds of other harmful animals. Blocking the racket.

Common diseases are mainly sclerotinia sclerotinia and viral infestation. Plants infected with sclerotinia sclerotinia begin with water-stained, light brown spots and then spread upwards. The color of the marks changes from light brown to grayish-white.

At this time, the base of the rhizome is soft rot, and white flocculents, or black sclerotia, grains grow. In the case of light damage, the plants are yellow in the spotlight, and in the worst cases, a large number of them wilt and die. Prevention and control methods:

The plants are first uprooted and treated intensively to reduce spread. Pay attention to drainage in the rainy season, avoid water accumulation in the grass and filial piety, and reduce the disease conditions. The second is to control with chemical pesticides.

The common ethylene sclerotinia agent can rupture sclerotinia cells. The commercially available 50% Nongli Ling wettable powder, with a dosage of 75-100 grams per mu, is sprayed with water, 1 time a week, 3-4 times in a row, which can be basically controlled. You can also choose 25% promethoxyl suspension, with a dosage of 66-100 grams per mu, sprayed with water, and the control effect can also be obtained.

In the case of white clover infected by the virus, the leaves appear spotted or the veins are yellowed or shrunken in the early stage, and the plant dies in severe cases. The prevention and control method can only start from improving the cultivation conditions, and it is difficult to use drugs to prevent and control it. Methods such as seed disinfection, soil treatment, and killing of insect vectors can be used.

Trilobite insect pests mainly include: leafhoppers, white-powdered butterflies, ground tigers, etc., usually pay attention to observation, once found, timely prevention and control.

Leafhopper: Mainly larvae and adults inhabit the dorsal of leaves, sucking leaf sap. In the light, the leaves turn green, and small white spots appear on the leaves, while the leaves are pale in the heavy, and the ornamental value is greatly reduced.

Control method: In late April, if the larvae are found, they can be sprayed with 1500 times of 50% pine borer, or 2000 times of pyrethroid pesticides. The spraying should be even, and the foliar surface, the back of the leaf, the top and bottom of the plant, and the inside and outside should be sprayed.

Ground tiger: early spring damage to the root shoots, especially sandy soil and continuous cropping occurs heavier, some bite off the rhizomes on the ground, and some gnaw the sprouts from the ground, causing the plants to die in patches. In addition to the commonly used venom trapping, carbofuran granules can be used for furrow application or hole application, with a dosage of 1500-2000 grams per mu.

The drug has a long residual effect period, and it can avoid harm 7-8 weeks after application.

Powdery butterfly: It is one of the major pests of clover. From April to October every year, powdery butterfly larvae often damage the leaves.

It is especially severe in the summer when it is hot and dry, and the larvae can eat up the leaves. The growth of the affected plants is weakened. It can be sprayed to kill the fungus during the larval damage period.

It can also be sprinkled with trichlorfon powder when the dew is not dry in the morning, with a dosage of 3-4 catties per mu, and the effect is ideal.

In addition, before entering the summer, the plants that grow too vigorously can be mowing once, so as to facilitate ventilation and light transmission, cultivate strong seedlings for summer, and reduce physiological yellowing. The cut grass leaves are either used as livestock fodder or as green manure. Pay attention to irrigation after mowing, so that it can return to growth as soon as possible and enhance resistance.

Clover mottle virus causes four diseases of edible legumes and Mediterranean clover (also known as ground clover). Mediterranean axle grass mottle virus disease: mottled and deformed leaves, severely dwarfed plants.

Pea (SCMOV) virus disease: local necrosis. In addition, ground clover mottle virus also infects broad beans, cowpeas, and Mucuna pruriens.

Medicinal value.

It is used for colds, coughs, toothaches, acute tonsils, pharyngitis, acute and chronic hepatitis, enteritis, dysentery, pediatric chancre, hypertension, headache, migraine, rheumatic joint pain, leucorrhea; The stem burns ash and points the eye to cure the eyelid.

There are three main groups of trifolium: axle grass (the most authentic clover at present), sorrel, alfalfa and others.

White clover (also known as "white clover"), leguminous and axle grass is a short-term perennial herb with a growth period of up to 5 years. There are more than 300 species all over the world. White clover is an excellent forage grass, rich in protein and minerals, cold and heat resistant, can adapt to acidic and alkaline soils, and is a promising species in this genus in China.

It can be used as green manure, embankment protection grass seeds, lawn decoration, as well as nectar sources and medicinal materials. The special mutant that appears by chance has four leaves, meaning "lucky grass". The most cultivated ones in China are red clover, white clover and miscellaneous clover.

In many Western countries (e.g., the United Kingdom, the United States), the four-leaf clover (i.e., four-leaf clover) represents luck because it is considered to be a plant only found in the Garden of Eden. And in some countries, the plum blossom in the playing card is the clover that represents luck. In regions such as Australia and Canada, axle grass is a weed and must be removed.

In China, the number of clovers varies depending on the number of clovers, such as three pieces representing hope.

In fact, the clover man can also be eaten, tasted. Its leaves have a faint sour smell and feel pretty good. And there are many small birds that like to eat the leaves of clover.

Identification of the host: medicagotruncatula: systematic mosaic, dwarfed plants.

Peas: inoculated for 7 14 days, inoculated with local wilt of cheating leaves. Ground clover:

Ground clover is a susceptible variety woogenellup that is a quasi-identification host and is symptomatic about 10 14 days after inoculation. At first, the young leaves are veined, and then the obvious system is mottled, the leaves are small, deformed, and the plants are seriously dwarfed. trifoliumclypeatum：

After 10 14 days of inoculation, the systemic symptoms were obvious, the persistent severe pulse was bright, the leaves were small, greenish, mottled, necrotic stripes along the veins, and the severely diseased plants were dwarfed. Trigonellabalansae (SA5054): After 6 days of inoculation, the inoculated leaves produced obvious local necrotic spots.

10 After 14 days, systemic symptoms appeared, the young leaves were bright, the leaves were small and deformed, and the diseased plants were dwarfed. Quinoa: 7 14 days after inoculation, the inoculated leaves produced local greening or necrotic spots, and the young leaves showed systematic mottling at 3 weeks.

Serological detection: It is distantly related to the transient line virus of alfalfa, but there is no serological relationship with viruses such as southern bean flower leaves, quinoa flower leaves, villous smoke mottled and scopole mottled viruses of the genus Sobemovirus. Quarantine risk assessment:

Clover mottle virus, the pathogen of the disease, can be transmitted over long distances through the poisonous seeds of clover. It has not yet happened in the country. When Ji Liang conducted a risk assessment, the risk value was 4 points, and it was determined as a low-risk quarantine pest.

However, the damage is mild and no quarantine is required.

Virus name: Clover mottle virus. Classification Status:

Phaseolus vulgaris mosaic virus is a genus of sobemovirus, not divided. The codes in the International Committee on Taxonomy of Viruses (IC-TV) are: Virus synonyms:

Physicochemical properties of the virus: nucleic acid: virions contain 20% nucleic acids.

Single-molecule linear sense RNA (ssRNA), 4200 bp long, molecular mass. In the NCBI database, there are 9 sequence registrations of Mediterranean Axle mottle virus, 6 of which are full sequences: GI 24323599 Ref NC.

White clover mosaic virus causes diseases in four edible legume crops and a variety of leguminous forage grasses. Phaseolus vulgaris (WCLMV) virus disease: leaves turn green, systematically yellow, and necrotic spots appear on the leaf veins.

Pea (WCLMV) virus disease: bright veins and mottled symptoms appear on the leaves, leaf deformities, and necrosis of some stems and leaves. Fava bean (WCLMV) virus disease:

The leaves have local dead spots, and the mosaic leaves are mildly systemic. Alfalfa (WCLMV) virus disease: mottled mosaic leaves.

WCLMV virus disease: On white C. axle, green rings, patches or small spots first appear on the leaves, then gradually turn into brown necrotic spots, and mottled or mosaic leaves can also be produced on white and red C. saxil. In addition, the white clover mosaic virus also causes viral diseases on crops such as mung beans.