What to Do When a Kiwi Tree Is Frost-Damaged? The Latest Response Methods
Kiwifruit has strong adaptability to the environment and is grown in most parts of China, but due to the influence of climatic conditions, in some areas we need to prepare kiwifruit for overwintering and cold protection before winter arrives. But sometimes frost damage still occurs, so after the kiwifruit tree body suffers frost damage, how should we carry out remedial measures? Let us learn about it together below.
1. Strengthen management and supplement nutrients
After kiwifruit suffers frost damage, its vitality is very fragile at this time. In order to restore the growth of the kiwifruit tree body, we need to strengthen soil and fertilizer management in the orchard and supplement the nutrients needed for kiwifruit growth, so that the tree vigor can be restored as quickly as possible. First, we should increase fertilizer application and combine it with watering, and spray an appropriate amount of photosynthetic nutrient film fertilizer, which can strengthen the photosynthesis of the tree body, improve fertilizer use efficiency, and promote the growth of new branches. Alternatively, we can spray nutrients such as Jiadengsu and Yizhikang as well as Yiyangyuan microbial fungicide, which are also nutritional agents used to promote the growth of branches and leaves and enhance vitality.
2. Carry out bridge grafting, grafting, or replanting
Bridge grafting is generally used when the kiwifruit tree body has suffered only a small degree of frost damage, or for young fruiting trees in the initial stage; then we can carry out bridge grafting on the frost-damaged part of the main trunk before budding to remedy it. But if the kiwifruit tree body has suffered serious frost damage, then we have two ways to handle it. The first is to cut it back to the base as soon as possible, regraft a new variety, and strengthen management; the second is to replant and fill in the missing plants, so as to achieve early fruiting and high yield as much as possible.
3. Prune frostbitten branches
After the kiwifruit tree body suffers frost damage, after the new branches bud, we need to prune away the frostbitten parts, and also prune away all the remaining branches and leaves as much as possible, leaving only one branch that can grow into a canopy in the current year. Also, after pruning away the frostbitten parts and other branches and trunks, in order to prevent the branches from being infected by pathogens, we had best promptly apply a layer of anti-corrosion film, which can effectively protect the branches and promote wound healing.
4. Do a good job of pest and disease control
After the kiwifruit tree body suffers frost damage, its own immunity and resistance are correspondingly reduced. If protective measures are not taken, it is very easy for it to be damaged by pests and diseases. First, we need to prune away the frost-damaged branches, then use 50-times machine oil emulsion to seal the pruned parts. When the buds are about to sprout, we can spray an appropriate amount of lime sulfur mixture at the corresponding Baume degree, which can effectively prevent canker and other insect pests and diseases.
The above are the remedial measures we can take after kiwifruit suffers frost damage that the editor wants to share with you today, and I hope it can help friends in need. If you still have other questions, or want to learn about measures to prevent frost damage in winter, you can also consult the editor or leave a message.