Prevention and control of mosaic virus disease in growing papaya
Papaya mosaic virus disease is a destructive disease commonly occurred in papaya producing areas in recent years. After one kind of plant, the disease will occur, there are mottled yellow flowers on the leaves, the new leaves are dense and tight, quickly lose green and become hard and brittle, easy to break, and then do not send new roots, do not grow new leaves, the plant grows smaller and smaller, and gradually wither and die.
The infected plants can not blossom and bear melon, and the yield is low and the quality is poor, so comprehensive measures must be taken to control the disease: after the seedlings of papaya are planted and survived, the mixed solution of 1000-fold zinc sulfate and 600x plant virus vaccine is applied to the root, about 1.5kg per plant, in order to weaken the virus activity in papaya plants and obviously reduce the occurrence and harm of papaya mosaic virus disease. During the growth and development of papaya plants, 600x plant virus vaccine, 1500 fold Shennong chelate fertilizer, 1000 fold zinc sulfate mixture, or 800x virus Bike, 1000 times Zhuangfengyou and 1000 times zinc sulfate mixture must be sprayed on the leaves every 15 days. All leaves should be sprayed evenly, and it is appropriate to start dripping water, which can control the occurrence and harm of papaya mosaic virus disease.
In addition, attention should be paid to the control of insects that spread mosaic virus diseases, such as aphids, scale insects and whitefly. During the growth and development of papaya, pay attention to check the stems and leaves, and when the above pests are found to be harmful, spray 1000 times aphid lice clean water solution, or 1500 times scale lice clean water solution, or 1000 times scale lice clean water solution, or 1000 times scale lice water solution, once every 7 to 10 days, spray all stems and leaves evenly, in order to start to drop water droplets, it is appropriate to kill the above pests and avoid the spread of mosaic virus.
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How to grow cotton well
If you want to grow cotton well, you should master the following key techniques. First, strictly control the sowing quality. 1. Select high-quality and high-yield varieties. Select the excellent varieties promoted by the local agricultural technology department. 2. Sow seeds before sowing. On a sunny day, spread the seeds on non-cement ground and dry them for 5 days.
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Cultivation and management techniques of growing papaya
1. Select excellent varieties. Suitable for local varieties are Yizhou papaya, poinsettia papaya and so on, and can pollinate each other. 2. Planting and establishing the garden. It is appropriate to choose loam or sandy loam with deep and fertile soil layer, good drainage, neutral or slightly alkaline soil. The distance between rows is 2.5 m and 4 m. Before planting
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