What medicine is used for pear rust?
Pear rust, also known as red spot disease, is not only a serious impact on the development and growth of pear trees, but also one of the common diseases of pear trees. What kind of medicine should be used if the pear tree has rust?
What medicine does pear rust use?
In the initial stage of pear rust, 20% trimethoprim EC can be sprayed 1000 times, and 20% flusilazolide 1000 times, 12.5% uniconazole 3000 times, 10% flusilazole 1200-1500 times can be sprayed to prevent and cure pear rust, pay attention to do not spray during flowering to avoid drug damage.
What is the incidence rule of pear rust?
1. Variety factor
There are great differences in resistance to pear rust among different pear varieties.
two。 Leaf age
The pathogen could not infect the leaves after growing for more than 3 weeks.
3. Alternate host
If there is no alternate host, the pathogen will not be able to complete its life cycle and the disease will not occur. The cultivation area of the transferred host is wide and the quantity is large, which creates conditions for the occurrence of pear rust.
4. Climate
The disease is easy to be prevalent if there is more rainfall and heavy rainfall from the beginning of April to the first and middle of May. The pathogen overwintered with perennial mycelia on the branches and leaves of juniper, and formed basidiospores in the next spring, which spread to pear trees by wind and rain. After germination, they were infected directly from epidermis or stomata.
- Prev
What fertilizer should be applied to grapes during the secondary expansion period?
Grape is a fruit that many people like to eat, which can be eaten raw, make raisins, make wine and so on. In the process of planting, when the grape grows to the berry expansion stage, fertilization is particularly important. So, what kind of fertilizer should be applied during the second expansion period of grapes? First, the application of grape during the second expansion period
- Next
How to treat root rot
Root rot usually occurs from late March to early April, and enters the peak period in May, which will cause root rot and death. How does it treat it? How to prevent it? How to treat root rot? The treatment of root rot in different plants is different from the drugs used.
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.