Capsicum annuum disease seriously affects the yield and quality of pepper. Timely Pesticide control is the key.
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Symptoms: The whole plant is dwarfed in the field, the yellow fern leaves are not strong or the fruit is small and the decay is not long. The artificial inoculation leaves produce dead spots and develop into systemic mottle or necrosis.
Pathogen: Broadbeanwiltvirus referred to as BBWV, a strain of the broad bean wilt virus pepper isolate.
Is a virus. The virion is spherical and has a diameter of about 25 nm. The ultrathin section of the diseased tissue is observed under an electron microscope. The long tubular inclusion body dispersed in the vicinity of the tonoplast is about 80 nm in diameter and has a striate crystal in the cytoplasm. The in vitro passivation temperature is 65-70 ° C, the dilution limit is 10000-100000 times, and the in vitro shelf life is 6 days under the condition of 20-22 °C. It can infect 25 plants such as Polygonaceae, Leguminosae, Compositae, Solanaceae. The BBWV isolate that naturally infects pepper in the field has not been reported in China. It is different from the BBWV isolate on other hosts at home and abroad. It may be another line of BBWV. .
According to the pesticide network , the virus can be non-persistently transmitted by peach aphid, and the transmission rates on petunia, amaranth, and quinine are 55.5% and 44.4%, respectively. And 7%. Its occurrence is related to the situation of mites and mites, especially in the case of high temperature and drought, which not only facilitates the transmission of mites, but also reduces the parasitic disease resistance. The situation is low and the planting late planting is easy to induce the disease.
Control method:
(1)Select Zhongjiao 2～7, Nongfa, Nongle, Jinjiao No.2, No.3, Liaojiao No.4, Jijiao No.2, Zaofeng No.1, Sujiao No.2, No.3, Qijiao Antiviral diseases such as No.1, Zazao No.2, Xiangyan No.18, Special Anti-No.1 Pepper, and New Red Chili Pepper.
(2) Sowing at the right time to cultivate strong seedlings. It is required that the seedlings are short and strong, and the first branch is planted with flower buds.
(3) Seeds are soaked with 10% trisodium phosphate for 20 to 30 minutes, then washed and germinated, and 0.1% to 0.2% zinc sulfate is sprayed separately before seeding, planting, or flowering.
(4) Using the facilities of the protected area, planting it 20 to 25 days before the final frost, or using plastic film to cover the cultivation to promote its early planting and early results, and the pepper has been full of branches and roots, and the roots are developed and the plants are old and healthy. Strong disease resistance.
(5) Pepper withered top. Shading cultivation in time to prevent mites. It can be intercropped with high-beam crops such as sorghum and corn to reduce the occurrence of viral diseases. The locust control method refers to the book locust.
(6) Formulated fertilization technology, applying base fertilizer and watering. In particular, it is necessary to fertilize and water the harvest during the harvesting period.
(7) China Pesticide Network recommends spraying 7.5% ketoxin water 700 times liquid or 5% toxic clear WP 500 times liquid, 20% virus water soluble powder 500 times liquid, NS-83 100 times solution, 20% toxic nemesis WP 500 times solution, 0.5% anti-toxic agent No. 1 water agent 200 ~ 300 times solution, plant virus passivation agent 912 per 667 square meters of drug powder 75 grams of warm water diluted into a paste Soaked in 1kg of boiling water for 12 hours, stir well and let cool, after 15kg of water, after planting, the first fruit period, the fruiting period will be sprayed once in the morning and evening, in addition to the attenuated vaccine N14, satellite ribonucleic acid (ie satellite virus) ) S52.