What are the methods for treating zucchini mosaic virus disease?

Zucchini, also known as eggplant melon, white gourd, and bear melon, is an annual trailing herbaceous plant and has also become a fairly popular balcony vegetable. However, zucchini encounters mosaic virus disease during the growing process. If the zucchini you planted has also contracted mosaic virus disease, how should you handle it?

Zucchini mosaic virus disease

1. Soak seeds in 10% trisodium phosphate solution for 20 minutes, or in warm water at 55°C for 30 minutes.

2. In the early stage of the disease, use 1.5% Zhibingling emulsifiable concentrate at 1000 times dilution, or 20% Virus A wettable powder at 500 times dilution, or NS-83 resistance enhancer at 100 times dilution, or 0.5% Antiviral Agent No. 1 at 250-300 times dilution, 1000 times potassium permanganate solution, or 20×10-6 naphthalene acetic acid, once every 7-10 days, spraying 3-4 times consecutively; the above solutions can be used alternately.

3. Control aphids and nematodes. Silver-gray film can be hung to repel aphids, and 2.5% deltamethrin or sumicidin emulsifiable concentrate at 2000-3000 times dilution, 50% pirimicarb wettable powder at 800-1000 times dilution, and 10% cypermethrin emulsifiable concentrate at 2500 times dilution can be sprayed alternately for control, spraying 3-4 times consecutively at intervals of 7-10 days; where conditions permit, insect-proof nets can also be used.

Control of muskmelon mosaic virus disease

Muskmelon mosaic virus disease harms the leaves and fruits of crops, affecting the normal growth of crops. Farmer friends should apply pesticides in time to control muskmelon mosaic virus disease.

Symptoms for the control of muskmelon mosaic virus disease: the lesions on the leaves are initially water-soaked round spots, then develop into small brown spots with yellow edges, and rapidly expand and turn brown, spreading to the leaf veins, and along the leaf veins toward the petiole; finally multiple lesions merge into large brown spots, and the leaf margin dries up. Muskmelon seeds can carry the virus, which is transmitted by cotton aphids, green peach aphids, and sap contact. The level of seed virus carryover is related to how early the disease occurs; seeds from early-onset disease have a higher virus carryover rate. The disease is severe under conditions of high temperature, drought, or strong light.

Infection patterns for the control of muskmelon mosaic virus disease: pathogenic bacteria attach to the seeds and invade the stems and leaves when the seeds germinate, causing disease. The bacteria of this disease can also overwinter in the soil with damaged residual plants, and invade the plant through water droplets and other means from the stomata and water pores of leaves and stems in the following year. After multiplying within the plant, they overflow from the lesions and stomata, splashing with water droplets and causing repeated infection. This disease is severe under cool and humid conditions. It is mild in summer with abundant sunshine, high temperature, and dry conditions.

Control measures for muskmelon mosaic virus disease: focus on cultivation-based disease prevention and promptly eliminate aphids. Seed treatment: soak seeds in warm water at 55°C for 20 minutes, then transfer to cold water to cool, then germinate and sow. Cultivate strong seedlings and transplant at the appropriate time. During pruning, pinching, pollination, and other farming operations, do not bruise the leaves and vines to prevent contact transmission. Pay attention to plot selection. Muskmelon, watermelon, and zucchini should not be mixed-planted to avoid mutual virus transmission. Adopt formula fertilization techniques to improve disease resistance. When aphids are found, promptly spray 4.5% high-efficiency cis-trans cypermethrin emulsifiable concentrate at 2000 times dilution, or 50% pirimicarb wettable powder at 2000-2500 times dilution. In the early stage of the disease, begin spraying 20% Virus A wettable powder at 500 times dilution, or 1.5% Zhibingling emulsifiable concentrate at 1000 times dilution, 83 resistance enhancer at 100 times dilution, Antiviral Agent No. 1 at 300 times dilution, about once every 10 days, for 3-4 consecutive treatments.

The above are the symptoms and control of muskmelon mosaic virus disease. Farmer friends should apply pesticides in time to control the spread and occurrence of the disease for the best control effect, and the disease will be brought under control.

Five common diseases of greenhouse zucchini

Greenhouse zucchini is prone to five common diseases: powdery mildew, gray mold, cottony leak, brown spot, and mosaic virus disease. Today, the editor will share with you the control methods for these five common diseases.

1. Powdery mildew

1. Symptoms: It mainly occurs on leaves, and can occur at the seedling stage and adult plant stage. White, nearly round, small powdery mildew spots first appear on the leaf surface, then merge into patches and cover the entire leaf with white powder.

2. Disease conditions: The pathogen survives on diseased plant residues and spreads through airflow. It is severe under high temperature and high humidity.

3. Control methods: ① Pay attention to ventilation and moisture dissipation to prevent condensation. ② Chemical control: use 20% triadimefon emulsifiable concentrate at 2000 times dilution, 50% sulfur-multi suspension concentrate at 400 times dilution, 50% sulfur suspension concentrate at 200 times dilution, spraying once every 5-7 days, 2-3 times consecutively.

2. Gray mold

1. Symptoms: It mainly harms flowers and fruits. The base of flowers and young fruits is initially water-soaked, soft-rotted, and densely covered with gray mold.

2. Disease conditions: The pathogen survives with diseased plant residues, and can also overwinter in the soil as sclerotia. Low temperature and high humidity are the conditions for disease onset.

3. Control methods: In the early stage of the disease, use 50% procymidone at 1500 times dilution, 50% iprodione at 1000 times dilution, 50% vinclozolin at 500 times dilution, 65% metalaxyl at 1000 times dilution, 50% dimethomorph at 1000 times dilution, 40% tecloftalam at 800 times dilution, spraying once every 5-7 days, 2-3 times consecutively. On rainy days, 20% procymidone smoke agent or 10% procymidone dust agent can be used. When using 24-D for flower dipping, add 0.40% procymidone or dimethomorph, which both prevents fruit drop and controls disease.

3. Cottony leak

1. Symptoms: It mainly harms fruits. On the fruit, it initially appears as oval, water-soaked, dark green lesions, slightly sunken, with the flesh beneath the skin turning brown and rotting, and a white mold layer forming on the surface. It sometimes also harms stems and leaves; on the petioles and stems, water-soaked dark green lesions initially appear, and when moist, they become soft-rotted as if scalded by boiling water.

2. Disease conditions: The pathogen overwinters in the soil and spreads with flowing water. Low soil temperature and high humidity favor disease onset.

3. Control methods: ① For soil treatment, use aluminum ethylphosphonate-manganese zinc at 10 grams per sq m, mix with an appropriate amount of fine soil, and spread in the seedbed or planting holes. ② For chemical control, use 70% mancozeb at 500 times dilution, 80% aluminum ethylphosphonate at 500 times dilution, 58% metalaxyl-mancozeb at 500 times dilution, 50% metalaxyl-copper at 500 times dilution, 50% DT at 500 times dilution, spraying once every 7-10 days, 2-3 times consecutively.

4. Brown spot

1. Symptoms: It mainly occurs on leaves, developing from the bottom upward. The lesions are round, with a yellow-white center and yellow-brown edges. The lesions on the upper leaf surface are slightly raised with a rough surface, while the underside is water-soaked with chlorotic halos.

2. Disease conditions: The pathogen survives on seeds or diseased plant residues and spreads with airflow and watering. High temperature and high humidity cause the disease to become epidemic.

3. Control methods: ① Seed disinfection treatment: soak seeds in warm water at 55°C for 15 minutes, and strengthen ventilation to dissipate moisture. ② Chemical control: 75% chlorothalonil at 600 times dilution, 50% iprodione at 1000 times dilution, 50% beideli at 500 times dilution, spraying once every 7 days, 2-3 times consecutively; on rainy days, 40% chlorothalonil smoke agent or 5% chlorothalonil dust agent can be used.

5. Mosaic virus disease

1. Symptoms: Dark green blister-like spots appear on the top leaves, some leaves become deformed and claw-like, and tumor-like growths appear on the surface of the fruit.

2. Disease conditions: The pathogen of this disease is a plant virus, transmitted by aphids, and through seeds and contact during manual operations. It is severe under high temperature, drought, strong sunlight, and fertilizer deficiency.

3. Control methods:

① Whole-greenhouse disinfection treatment: after the previous crop is harvested and before sowing, use 5% Junduqing at 300 times dilution plus trisodium phosphate at 500 times dilution, and spray the entire greenhouse.

② Promptly control aphids, controlling aphids to prevent disease.

③ Chemical control: in the early stage of the disease, use 5% Junduqing at 300 times dilution, 1.50% Zhibingling at 500 times dilution, Lufenwei No. 1 at 600 times dilution, once every 10 days, spraying 2-3 times consecutively.