MySheen

Watermelon should pay attention to prevent the harm of new virus

Published: 2024-11-21 Author: mysheen
Last Updated: 2024/11/21, A quarantine virus disease, cucumber green mottle mosaic virus, has been discovered. It is necessary to pay attention to prevention, but it is not necessary to pull it out and replant regardless of the reason. Here, let's introduce this new viral disease. Cucumber green mottle mosaic virus has a narrow host range, which mainly occurs in yellow.

A quarantine virus disease, cucumber green mottle mosaic virus, has been discovered. It is necessary to pay attention to prevention, but it is not necessary to pull it out and replant regardless of the reason. Here, let's introduce this new viral disease. Cucumber green mottle mosaic virus has a narrow host range, which mainly occurs in several cucurbitaceae crops, such as cucumber, watermelon, melon and so on. The virus belongs to mosaic virus, and its symptoms are similar to those of common mosaic virus (mainly tobacco mosaic virus and cucumber mosaic virus). The main symptoms are slow plant growth and development, irregular discoloration or yellowish mosaic, green protruding surface, uneven leaf surface, leaf edge curling, and then dark green concave spots, which are alleviated with the aging of leaves. The virus has a great influence on the fruit, such as yellowing or whitening of melon strips and dark green blister-like necrotic spots on cucumbers; the surface of watermelon fruit is uneven, the sound is blunt when slapping, the flesh is seriously discolored or deteriorated and rotten, and it is in the shape of towel gourd when ripe, commonly known as "blood flesh", which tastes bitter and can not be eaten. From the point of view of the route of transmission of the virus, it is mainly transmitted through seeds and contact (juice contact or agricultural operations), but it can also be transmitted through soil, but the virus has not been found to be transmitted by virus-borne pests. Therefore, in the early spring watermelon in the arch shed, most of the watermelons occurred in a large area before April, and vegetable farmers should pay special attention to the watermelon seedling stage and after planting. To prevent the virus, you must first disinfect the seeds. Soak the seeds with 10% trisodium phosphate solution for 10-20 minutes to avoid seed transmission. If suspected virus symptoms are found in the seedling stage, they should be removed immediately, the surrounding plants should be isolated and observed, and Ningnanmycin, virus A, chitin and other prevention should be sprayed. If the virus has occurred in a large area, it is necessary to change the stubble in time, and do not replant watermelons, cucumbers and other susceptible crops, but plant eggplant fruits and beans instead, so as to avoid the spread and occurrence of the virus.

 
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