How to treat pumpkin fern leaf virus, small seedlings

When the temperature of pumpkin virus disease is higher than 30, the infected plants show symptoms of damage. High temperature and drought are conducive to the migration and reproduction of aphids, and are easy to induce the epidemic of pumpkin virus disease. Pumpkin virus disease in Zhejiang and the middle and lower reaches of the Yangtze River has two peak occurrence periods: May to June in spring and September to November in autumn, and autumn is generally heavier than spring.

1. Choose varieties that are resistant to viral diseases.

The two strains of Wuyang Golden Luffa and Shanghai Chongming's -2 showed disease resistance, and could be popularized and applied in a large area in production.

2 Proper fertilization.

Apply compost made of enzyme bacteria, pay attention to the combination of nitrogen fertilizer, phosphate fertilizer and potassium fertilizer, and increase the application of Pica fertilizer can improve the disease resistance of pumpkin.

3. Intercropping.

The intercropping of pumpkin and barley with a symbiotic period of about 20 days can reduce the migration of aphids due to the shading of wheat straw, and the onset period can be delayed by 3-12 days, which can slow down the onset of disease.

4 Avoid aphids. After the pumpkin is planted, it is covered with a silver-gray film to avoid aphids and reduce the occurrence of viral diseases.

5. Pharmaceutical prevention and control.

At the beginning of the disease, spray 5% bacterial poison clear wettable powder 400 times, 20% morpholinoguanidine copper wettable powder (poison buster) 500 times, anti-poison No. 1 water agent 300 times, 20% virus Ning water-soluble powder 500 times or NS-83 antagonist 100 times, or plant virus passivator-912, 75 grams per mu, add a small amount of water to make a paste, soak in 1 kg of boiling water for more than 12 hours, fully stir and cool and mix with 15 kg of water, in the planting, early fruit stage, Spray once in the morning and evening during the full fruiting period. In addition, zinc sulfate can also be sprayed 1000-1500 times.

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Find the right person, this medicine is not cured, it specializes in treating this kind of virus, search on the Internet Biopesticide 30% Suspension Willow Spray two or three times to cure.

Prevention and control methods of pumpkin mosaic virus disease: (1) seed treatment. Leave seeds from disease-free fields and disease-free plants, disinfect seeds before sowing, soak seeds in warm water at 50 degrees Celsius for 20 minutes, or soak seeds with 10% trisodium phosphate for 20 minutes, rinse with water, and then germinate and sow seeds.

2) Timely prevention and control of aphids, leaf beetles and other insect pests.

3) For the prevention and control of pesticides, in the early stage of the disease, 500 times of 20% virus A wettable powder, or 1000 times of phytolingling emulsion, 100 times of 83 anti-drug agent, or 400 times of 50% bacterial poison clear water spray, spray once every 7 10 days, and continuously prevent and control 2 3 times.

Surely in the middle and before the middle term, the whole can be cured.

There is no problem with taking the medicine strictly according to the method.

(1) Leave seeds from disease-free plants to prevent seed poisoning.

2) Strengthen field management and timely control of aphids, leaf beetles, etc.

3) Commercial seeds are soaked in 10% trisodium phosphate for 20 minutes, washed with water and sown.

4) At the beginning of the disease, spray 500 times of 20% virus A wettable powder, or 1000 times of phytolingling emulsion, 100 times of 83 anti-drug agent, and 400 times of 5% bacterial poison water agent, once every 10 days, and 2 3 times of continuous prevention and control.

1) Select seeds from disease-free plants to prevent seed poisoning. 2) Strengthen field management and timely control of aphids, leaf beetles, etc. 3) Commercial seeds are soaked in 10% trisodium phosphate for 20 minutes, washed with water and sown.

4) At the beginning of the disease, spray 500 times of 20% virus A wettable powder, or 1000 times of phytolingling emulsion, 100 times of 83 anti-drug agent, and 400 times of 5% bacterial poison water agent, once every 10 days, and 2 3 times of continuous prevention and control.

(1) Leave seeds from disease-free plants to prevent seed poisoning. 2) Strengthen field management and timely control of aphids, leaf beetles, etc. 3) Commercial seeds are soaked in 10% trisodium phosphate for 20 minutes, washed with water and sown.

A kind of agent for the prevention and treatment of pumpkin mosaic disease. 4) At the beginning of the disease, spray 500 times of 20% virus A wettable powder, or 1000 times of phytolingling emulsion, 100 times of 83 anti-drug agent, and 400 times of 5% bacterial poison water agent, once every 10 days, and 2 3 times of continuous prevention and control.

If the virus is noisy, it can be prevented early, and if it is on the virus, it can be alleviated if it is light, and it can only be pulled out if it is serious, but when it is pulled, it will be pulled out when it leaves the shed, and it will be infected when it cannot work.

Pumpkin virus disease infection, first of all, eliminate whitefly aphid hazard transmission source harm, virus disease, should be based on prevention, reduce loss, a small amount can be removed, can be used amino-oligosaccharides plus lentinan plus zinc-containing foliar fertilizer or trace element foliar fertilizer (zinc-containing) plus avida mite or dinotefuran or dinotefuran spray control, can be added to Bihu or brassinin spray to prevent whitefly. Aphids. Thrips.

Mites. Source of transmission, once every 5 to 7 days, 2 to 3 times in a row.

Before the middle stage, it can be cured by spraying once every seven days with three times of medicine, and after the middle stage, the fourth time starts to be used once every ten days, and it takes 5-7 times.

Leaning leaf beetles (Diabrotica spp.).and Acalymma SppSpread, a coccinellid beetle and grasshopper.

In the period of possibility, hungry insects can acquire the virus in just 5 minutes. Even if required, the incubation period should not exceed 10 hours at most. Vaccination entry takes less than 24 hours.

If the time is shorter, the virus cannot be detected. The virus can last for about 20 days after 10 to 15 days. The shorter the inoculation time, the shorter the retention period.

The virus is usually passed by Cucurbita Moschata, C pepo，c. maxima c.

Seed propagation of mixta and cucumis melo. Commercial and experimental seed production typically yields about 1% of infected seedlings, but can also reach up to 94%. Watermelon dwarf strains are more seed-dispersed than other pumpkin mosaic virus strains.

It is usually spread by stinging and sucking pests, and it is no problem to cure, it is necessary to exterminate insects first, and it is a national patented product in use, non-toxic, and the effect is fast Strict medication, see the effect once, usually cured three times.

Symptoms of pumpkin mosaic virus disease: Pumpkin mosaic virus disease mainly infects leaves, stems and vines, and fruits can also be damaged.

The leaves are diseased, showing dark green and light green mottled flower leaves, or dark green alternating bands along the leaf veins, severe leaf surface shrinkage and unevenness, general heart leaf symptoms are more obvious, and the stems and parietal leaves are distorted after damage. The fruit is infected with greenish patches.

Cause of disease. Pumpkin mosaic disease is caused by viral infection, mainly caused by melon mosaic virus.

Infection cycles. Pumpkin mosaic disease overwinters on seeds or perennial root plants, and spreads by aphids, leaf carapace vectors, or sap rubbing and inoculation.

Onset conditions. High temperature and drought, high toxicity rate of seeds in the field, extensive management, many insect pests, and serious disease.

Pumpkin mosaic virus disease. Viruses are transmitted by aphids. The leaves are mottled and yellowed, and the yellow-green color is the basic feature of mosaic virus disease.

Foliar spraying of mushroom proteoglycan plus octymycomine acetate plus natural brassinin plus zinc sulfate plus veratroline for control, once every 7 10 days, 2 3 times in a row, in order to passivate the virus, weaken the virus activity, inhibit the reproduction of the virus, kill the virus and spread the virus pests, can reduce the disease, and make the diseased plants return to normal growth.

Mosaic virus disease, how many incidences, if there are insects to kill first, and then use drugs will definitely be cured, more than 20 years of technology is very mature.

Viral diseases can only be passivated, you can choose sterenol plus amino acid foliar fertilizer or Ningnanmycin or octylam morpholinoguanidine compound plus polypeptide foliar fertilizer to passivate the virus, but these are still not enough It is also necessary to control the vector of aphids, whiteflies, etc., and choose a compound of homochlorothiaploprid. Sterenol plus is recommended. Amino acid foliar fertilizer plus homochlorothiamproprid can passivate the virus and block the vector of transmission.