How to prevent and control peach gummosis? The key technical points explained in one article

Peach gummosis is a common disease in peach cultivation, occurring mainly between May and September. It causes significant loss of tree nutrients and gradually weakens tree vigor. So how should peach gummosis be prevented and controlled? Let's take a look at the detailed introduction below.

1. Disease symptoms

Gummosis can be divided into infectious and non-infectious types. The infectious type occurs mainly on branches and trunks, and can also harm the fruit. When the disease strikes, verrucous small protrusions appear centered on the lenticels, gradually expanding into tumor-like protrusions densely covered with black granules. Afterward the lesions expand and split open, exuding a translucent soft gum that later turns dark brown and hardens; in severe cases it causes the branches to die. The non-infectious type is a physiological disease. Its symptoms are somewhat similar to the former, but the cause is physiological gummosis brought on by freeze damage and numerous large mechanical wounds; in addition, bearing too many fruits can also induce physiological gummosis.

2. Causes of the disease

Physiological gummosis is mainly caused by other diseases, freeze damage, excessive pruning, mechanical wounds and other factors, while infectious gummosis is caused by fungal infection. Its pathogens are Botryosphaeria dothidea and Taphrina deformans; the pathogenic fungi overwinter as mycelium and conidia in parts such as the trunk and branches. After temperatures warm up in spring, they begin to multiply in large numbers and spread via wind and rain, invading through wounds and lenticels of the plant and causing disease.

3. Prevention and control techniques

First, strengthen fertilizer and water management and apply more organic fertilizer to improve the disease resistance of peach trees. At the same time, it is best to carry out orchard clearing in winter and spring; spraying lime sulfur mixture can thoroughly clean the orchard and prevent disease. In April and May for peach trees, spraying agents such as thiophanate-methyl, tebuconazole or cymoxanil mancozeb every 10-15 days has an excellent preventive effect. When gummosis occurs, first scrape off the gum completely, then apply Kuifuling and silicone stock solution several times. For trees with more gum, adopt the measure of brushing the trunk. For severe gummosis, in addition to smearing, root drenching can also be adopted: use Qingkulike at 200-300 times + Genjibao at 300 times + silicone for root drenching, which gives a good effect.

The above is an introduction to the prevention and control techniques for peach gummosis. We hope it helps you. To learn more related knowledge, please stay tuned to us.