How to treat rust disease in edamame? Detailed explanation of prevention and control methods

Edamame is a common field cash crop in our daily lives, with a relatively wide planting area, and during the edamame cultivation process, the occurrence of rust disease seriously harms the normal growth of edamame. So how should edamame rust disease be prevented and controlled? Let's take a look together with the editor.

1. Disease symptoms

Edamame rust disease mainly harms the leaves. The affected leaves are densely covered with rust spots the size of pillows; these are immature uredinia of the pathogen parasitizing the plant, and as the temperature rises, the uredinia gradually develop and mature, and after the epidermis ruptures, rust-colored powdery material is released. In the later stage, small black dots appear on the leaves; these are the telia of the pathogen, but because temperatures in most areas are relatively low in winter, the telia are generally only seen in southern Guangdong, because winter temperatures there are also relatively high, while in other areas there are basically no telia.

2. Disease occurrence pattern

The pathogen of rust disease is Phakopsora pachyrhizi, a fungus. Its pathogen mainly uses urediniospores as the primary infection source and reinfection inoculum, spreading in the field with the help of wind and rain to complete the disease cycle, and it cycles year-round. Disease is likely to occur in warm, rainy, and humid weather or in low-lying, moist plant environments. In addition, resistance among varieties is unknown, and whether some varieties that generally show stronger disease resistance can also resist rust disease still requires further investigation.

3. Prevention and control methods

① Agricultural control

First, select improved varieties with disease resistance and high yield. Before sowing, use Xinguozhimu (new high lipid film) for seed dressing to increase yield; this can effectively isolate viral infection, and it does not affect the germination and imbibition function. Instead, it strengthens respiratory intensity and improves the seed germination rate and seedling emergence rate. During the planting process, ensure a balance of fertilizer and water, and avoid excessive vegetative growth of the plants and overly wet soil, which can reduce disease occurrence. At the flower bud stage, young pod stage, and fruit swelling stage, spray Caiguo Zhuangdiling once each time, which can strengthen flowers and peduncles, enhance pollination quality, and promote fruit development.

② Chemical control

It can be combined with the prevention and control of downy mildew. When the plants are approaching the row-closing stage, while spraying downy mildew control agents such as metalaxyl, add 25% triadimefon wettable powder 2000-fold solution for simultaneous control.

The above is an introduction to the prevention and control methods for edamame rust disease. We hope it can help you. To learn more related knowledge, please stay tuned to us.