Since February, there have been low temperatures, rain, snow and freezing weather in many places in Hubei Province. The freezing rain before the Spring Festival, the ice particles + heavy snow after the Spring Festival, and the two extreme weather had a great impact on orchard management.
In February, the kiwi fruit trees are covered with freezing rain.
As the temperature rises and the ice and snow melt, kiwifruit is prone to all kinds of frost damage and diseases. Because the sap flow in spring is very easy to hurt the flow, a large amount of nutrients flow out of the wound, and the pathogenic bacteria take the opportunity to invade the tree body from the wound and multiply and spread, causing the tree to weaken and eventually canker disease.
When the staff of the red apple inspected the orchard base, they found that after the main trunk of the kiwifruit was frozen, cracks, fried skins, and wounds, which had caused kiwifruit diseases.
On February 28, he was a researcher at the Wuhan Botanical Garden of the Chinese Academy of Sciences and the executive deputy director of the National Kiwifruit Germplasm Resources GardenBell Rainbow, Go to the Red Ganping Bitaoju Base to carry out technical guidance on frost resistance and disaster mitigation after low temperature, rain, snow and freezing weather. Through on-site field investigation, it was found that individual trees in the orchard had canker disease, and Zhong Caihong proposed 4 countermeasures for the canker disease in the kiwifruit orchard
1. Isolation
When a canker-infected kiwi tree is found, it should be isolated from the healthy kiwi tree in time to avoid the spread of the germ through contact.
2. Destruction
For the canker kiwi trees found, the orchard should be uprooted and burned in a centralized manner. When handling diseased fruit trees, do not touch other fruit trees to avoid the spread of pathogens.
3. Disinfection
Orchard disinfection should be carried out immediately, and fertilizer and water management and pest control of healthy fruit trees should be strengthened. In orchard management, pay attention to the disinfection and cleaning of tools to avoid the spread of germs through tools.
4. Ditch cleaning
Canker disease likes to grow and spread in a humid environment, so it is necessary to clean the ditch in time, remove stagnant water, reduce the humidity of the orchard, and reduce the breeding and spread of germs.
At present, in accordance with the principle of "early, fast and strict", according to the technical guidance of experts, the red apple has made early preparations, implemented quickly, strictly implemented, resolutely and completely eliminated kiwifruit canker, and made every effort to promote the spring management of the orchard to ensure that the orchard increases production and income.
Tips:
Kiwifruit canker is a devastating bacterial disease, which has the characteristics of wide range, strong pathogenicity, rapid spread, and great difficulty, and has become one of the most serious diseases that harm kiwifruit.