Prevention and control of rotting root disease of growing papaya seedlings
Papaya root rot disease is also called papaya root rot disease.
The symptoms of the disease are mainly damage to the root neck and roots, and seedlings in the seedling stage and shortly after planting are more susceptible to the disease. In particular, the high groundwater level or poor drainage in nursery land and cultivated land are easy to cause stagnant water and soil stickiness. At the beginning of the disease, the plant appeared watery in the stem base, then turned brown and rotted, the leaves withered, the plant withered, and the roots became brown and necrotic.
The pathogen is Fusarium, which overwinters in the soil and becomes the source of infection in the second year, which is spread by flowing water.
The prevention and cure method should be ventilated and transparent in the seedling shed, reduce the temperature, and the seedling and planting land should be well drained to avoid stagnant water. before the rainy season, 1000ppm (about 1000 times dilution) phosphite can be sprayed three times, once every seven days, with good preventive effect. When in use, phosphorous acid shall be prepared on the same day and be neutralized with equal weight of potassium hydroxide.
Avoid continuous cropping or continuous cropping with vegetable fields (especially the previous crop is Cucurbitaceae); pay attention to the control of snails and ants; when diseased plants are found, the disease should be protected with liquid medicine. Use 1000 times of 70% dimethazone wettable powder or 50% carbendazim wettable powder, 0.3-0.5kg per plant, once in 7-10 days, and continuous irrigation 2-3 times in 7-10 days.
- Prev
Measures for fruit protection of papaya trees planted with papaya
The purpose of fruit preservation is to increase the fruit setting rate and reduce the drop of flowers and fruits. There are three main reasons for the flower and fruit drop of papaya: first, the tree is not strong, the growth is vigorous and weak, the tree body nutrition is insufficient, which leads to serious flower and fruit drop; the second is poor pollination and fertilization and lack of hormones in the ovary.
- Next
Experience of cultivating Hami Melon in greenhouse
In recent years, Xinjiang cantaloupe has been successfully introduced, demonstrated and popularized in Jiading, and a number of cantaloupe varieties suitable for cultivation in the eastern region have been selected, among which Xuelihong has become the leading Hami melon variety in this area. At the same time, through the form of base + farmers, ha
Related
- A course of planting techniques and methods on how to grow carrots
- How to plant the latest tulips?
- Is it better to pick tea in the morning or in the afternoon? When is the best time for tea to be picked? what is the third or fifth tea?
- Launch Yuanxiao Happy combination Haocha + Tea Yuan healthy Taste
- Penghu Tourism "Fireworks 20 Parade with You"
- 2022 West Lake Happiness holds "Digital Revitalization Voucher" and draws iphone13 and laptop.
- Banqiao Fuzhou social houses are designed to change start-up combined with police elimination to create a safe and livable environment
- The convenient measure of "mechanical weeding" in Xinbei has been abused and the Agriculture Bureau has imposed heavy penalties on the illegal land consolidation.
- Changgeng University Joins Hands with Four Memory Factories to Rescue Memory Talent Shortage
- The list of Taiwan's top 100 MVP managers is listed by the Director-General of the Farmers' Association of Sanxia District.