Integrated control of plant virus diseases
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Forest virus diseases include citrus cracking virus disease, avocado day spot virus, eucalyptus leaf spot disease, poplar leaf disease, paulownia arbuscular disease, and hedgehog arbuscular disease. Vegetables include: tomato, cucumber, lettuce and other viral diseases. The flower types include: peony virus No. 1, lily cluster virus, rose mosaic virus, daffodil stripe virus, dahlia virus disease, and the like.
First, the source of the virus 1. Most of the virus is due to the management of forests, vegetables, flowers and other production bases can not keep up, causing the spread of pests such as aphids, leaf fleas, whitefly and other insects and the spread of weeds. The virus is sick. 2. The virus can also be infected from a plant body, such as rhizomes, tubers, bulbs, seeds, cuttings, rootstocks, scions, during the grafting process, which can be transmitted through asexual propagation material. 3. The good and bad of nursery, vegetable greenhouses, flower warm sputum, etc. in water, fertilizer, ventilation, light transmission, etc., can directly or indirectly affect the severity of the virus. 4. Parasitic plants are infected with viruses after being parasitic to trees, vegetables, flowers, etc. Parasitic seed plants mainly include: mistletoe, mulberry, and dodder.
Second, the viral disease The ornamental virus has obvious symptoms. For example, Peony Virus No. 1, there are ring and line spots on the leaves, and all kinds of necrotic spots are harmful to the peony; the lily is sick, the leaves of the diseased plant are yellow, no flower stems are formed, the leaves become smaller, the distortion is drooping, and the deformity is open. Flowers or not flowering; rose mosaic virus, small leaves, medium veins producing ring-shaped sputum and watery yellowish patterns; narcissus virus, causing pale or yellow streaks and streaks on leaves and stems; dahlia virus disease It causes pale green ring spots on the leaves, malformations of the leaves, shortening of the internodes, and growth of the side branches, causing clumps, dwarfing, little or no flowering buds.
Third, the virus prevention 1. Timely removal of greenhouses, nurseries, warm weeds and weeds and pests.
2. Planting trees, vegetables, flowers, etc., should use excellent varieties that are resistant to cold, stress, and resistant to pests and diseases.
3. If the seedling production base is found to have mites, red spiders, whitefly and other pests, it is necessary to spray the medicine in time.
4. When breeding seedlings, strictly use non-toxic planting materials (including rhizomes, tubers, bulbs and seeds, cuttings, rootstocks, scions, etc.).
5. In the cultivation management, it is necessary to adjust the water and fertilizer, light, temperature and humidity, ventilation, light transmission and other aspects, no loopholes, create a good growth and small environment, so that the plant grows robust, the virus can not take advantage of.
6. If a diseased plant is found, it is necessary to pull out the burn and avoid spreading the other plants.
7. In the ward, antibiotics such as tetracycline and oxytetracycline can be used for prevention and treatment, which have inhibitory effects and control effects.
8. Use pesticides to kill. Parasitic plants such as mistletoe, mulberry, and dodder can be sprayed with 1.5% sodium pentachlorophenol, chlorpyrifos, and diltiazem.