Treatment of zucchini mosaic disease

Zucchini, also known as eggplant melon, white melon, bear melon, for the annual trailing herbs, has also become a more popular balcony fruits and vegetables. But zucchini will encounter mosaic disease in the process of planting, if your zucchini also have mosaic disease, how to deal with it?

Zucchini mosaic

1. Soak the seeds in 10% trisodium phosphate solution for 20 minutes, or soak the seeds in 55 ℃ warm water for 30 minutes.

2. At the initial stage of the disease, 1.5% Zhixianling emulsion 1000 times, or 20% virus A wettable powder 500x solution, or NS-83 enhancer 100x solution, or 0.5% antiviral agent 1 250mm 300x solution, 1000 times potassium permanganate solution, or 20 × 10 color 6 naphthalene acetic acid can be used alternately, once every 7 days and 4 times.

3. Control aphids and nematodes. Silver gray film can be hung to ward off aphids, 2.5% deltamethrin or Actamethrin EC 2000,3000 times, 50% aldicarb 800 times 1000 times, 10% cypermethrin EC 2500 times alternately spray control, spray 3 times 4 times at intervals of 7 to 10 days, and insect prevention nets can be used where possible.

Control of muskmelon mosaic disease

Melon mosaic disease harms the leaves and fruits of crops and affects the normal growth of crops. Farmers use medicine in time to control muskmelon mosaic disease.

The symptoms of prevention and treatment of muskmelon mosaic disease were water-immersed round spots at the beginning, and then developed into small brown spots with yellow edges, and then rapidly expanded and browned to the leaf veins, along the veins to the petiole, the disease occurred, and finally, several disease spots synthesized large brown spots and dried up from the leaf margin. Melon seeds can be poisonous and can be infected by cotton aphid, peach aphid and juice contact. The virus-carrying rate of seeds is related to the disease sooner or later, and the virus-carrying rate of seeds with early onset is higher. The disease is serious under the condition of high temperature, drought or strong light.

According to the law of prevention and control of muskmelon mosaic disease, the pathogenic bacteria attached to the seeds and invaded the stems and leaves when the seeds germinated. The bacteria of the disease can also overwinter in the soil with the damaged residual plants, and water droplets invade the plants from the stomata and water pores of leaves and stems in the coming year. After propagation in the plant, it overflowed from the disease spot and stomata, scattered with water droplets, and carried out repeated infection. The disease is serious under cold and humid conditions. The disease is mild when it is sunny, hot and dry in summer.

The control measures of muskmelon mosaic disease are mainly to cultivate and control the disease and kill aphids in time. For seed treatment, the seeds were soaked in 55 ℃ warm water for 20 minutes, then transferred to cold water for cooling, and then germinated and sowed. Cultivate strong seedlings and plant them in the right time. Do not touch leaf vines in agricultural operations such as pruning and pollination to prevent contact with infection. Pay attention to selecting parcels. Melons, watermelons and zucchini should not be mixed to avoid spreading poison to each other. The technology of formula fertilization was adopted to improve the disease resistance. It was found that aphids were sprayed with 2000 times of cis-cypermethrin EC or 2000-2500 times of aldicarb wettable powder. At the initial stage of the disease, 20% virus A wettable powder was sprayed 500x, or 1.5% Zhishuling emulsion 1000 times, 83 enhancers 100x, antivirus No. 1 300x, once every 10 days for 3-4 consecutive times.

The above are the symptoms and control of muskmelon mosaic disease, farmers timely use medicine to control the spread and occurrence of the disease, the control effect is the best, the disease is controlled.

Five common diseases of zucchini in greenhouse

Greenhouse zucchini is prone to five common diseases: powdery mildew, gray mold, cotton rot, brown spot, mosaic virus. Today, the editor will share with you the prevention and control methods of these five common diseases.

1. Powdery mildew

1. Symptoms: mainly occurred in the leaves, seedling stage and adult stage can occur, white near-round small powdery mildew spot appeared on the leaf surface, and then the whole leaf was covered with powdery mildew.

two。 Disease conditions: the bacteria survive on the diseased body and spread by airflow. The incidence of high temperature and high humidity is serious.

3. Prevention and treatment methods: ① should pay attention to ventilation and dampness to prevent condensation. ② medicament control, can use 20% trimethoprim EC 2000 times, 50% polysulfide suspension 400 times, 50% sulfur suspension 200 times, spray once every 5-7 days, even 2-3 times.

2. Grey mold

1. Symptoms: mainly harmful to flowers and fruits. The pedicels of flowers and young fruits are initially flooded, soft rotten, dense gray mildew.

two。 Disease conditions: the bacteria survive with the disease residue, and the sclerotia can also survive the winter in the soil. Low temperature and high humidity are the conditions for the disease.

3. Prevention and treatment methods: at the initial stage of the disease, 50% Sukeling 1500 times liquid, 50% Prophylaxis 1000 times solution, 50% Nongliling 1000 times solution, 65% Metalaxyl 1000 times solution, 50% Duoshuangling 1000 times liquid, 40% Tex 800x solution, spray once every 5-7 days, 2-3 times in succession. On cloudy and rainy days, you can use 20% Sukelin smoke or 10% Sukelin dust. Combined with 24Mel D, 0.40% dosage of Suganling or carbendazim is added to prevent both falling and disease.

III. Cotton rot

1. Symptoms: the main harm to the fruit, at the beginning of the fruit is oval water-immersed dark green disease spot, slightly sunken, the flesh under the skin turns brown and rotten, and the surface produces a white mildew layer. Sometimes also harms the stem, the leaf, in the petiole and the stem department primary water immersion shape dark green disease spot, when wet, the soft rot seems to be scalded by boiling water.

two。 Disease conditions: the bacteria overwintered in the soil and spread with the running water. Low temperature and high humidity of soil are beneficial to the disease.

3. Control methods: ① soil treatment with ethyl phosphorus, aluminum, manganese and zinc, according to 10 grams per square meter, mixed well with appropriate amount of fine soil, sprinkled in the seedling bed or planting hole. ② medicament control can use 70% mancozeb 500x solution, 80% ethanophosphate aluminum 500x solution, 58% Ruidu manganese zinc 500x solution, 50% Ruidu copper 500x solution, 50%DT500 double solution, spray once in 7-10 days, 2-3 times in succession.

4. Brown spot

1. Symptoms: mainly occurred in the leaves, the disease occurred from the bottom up, the disease spot was round, the middle yellow-white, the edge yellow-brown. The disease spot on the leaf surface is slightly raised, the surface is rough, the back of the leaf is watery, and there is a chlorotic halo ring.

two。 Disease conditions: the pathogen survives on seeds or diseased bodies and spreads with airflow and watering. High temperature and high humidity lead to the epidemic of diseases.

3. Control method: ① seed disinfection treatment: soak the seeds in 55 ℃ warm water for 15 minutes, strengthen ventilation and disperse dampness. ② medicament control: 75% chlorothalonil 600x liquid, 50% prohydantoin 1000 times liquid, 50 times Deli 500x liquid, spray once every 7 days, even 2-3 times, 40% chlorothalonil smoke remover or 5% chlorothalonil dust agent can be used in overcast and rainy days.

5. Mosaic virus disease

1. Symptoms: dark green blister spots appear on the top leaves, some leaves are deformed in the shape of chicken claws, and tumors appear on the surface of melons.

two。 Disease conditions: the pathogen of the disease is a plant virus, transmitted by aphids, seeds and manual contact transmission. The incidence of high temperature, drought, strong sunshine and lack of fertilizer is serious.

3. Prevention and control methods:

① whole-shed disinfection treatment: after the previous harvest, before sowing, use 5% bacterioxin 300x solution, and then add trisodium phosphate 500x solution, spray in the whole shed.

② timely control aphids, control aphids and prevent diseases.

③ medicament control: at the initial stage of the disease, use 5% Shiduqing 300x liquid, 1.50% Zhishanling 500x liquid, Lufenwei 1600x liquid, once every 10 days, spray 2-3 times continuously.