The latest control measures of spinach stem blight

In the process of spinach cultivation, spinach is easy to be infected by diseases because of improper planting management, and stem blight is one of them, which will not only affect the quality of spinach, but also cause yield reduction, which is a great headache. So how to control spinach stem blight? Let's get to know it with the editor.

1. Harmful symptoms

Spinach stem blight mainly harms breeding pigs, at the initial stage of the disease, fusiform or irregular gray spots are formed on the stem, the edge of the spot is dark brown, and there are a lot of small black spots on the spot. When the disease is serious, the diseased spot will go around the stem for a week, causing the leaves above the diseased part to droop, the root cortex of the diseased plant to rot, and in serious cases, the plant will die.

2. The route of transmission

The pathogen of spinach stem blight overwintered with mycelium and conidia in soil or on seeds with mycelium and conidia. The diseased plants first invaded seedlings to form blackfoot seedlings. The conidia produced by the disease will escape conidia, and then spread in the field by wind, rain or irrigation, carry out secondary infection, begin to infect the old leaves, and the harvest will invade the roots to form black rot. The parietal lobe is excised too low during harvest or cut along the base of the petiole, and the resulting wound will also give the bacteria a chance to rot during storage.

3. Prevention and control methods

① agricultural control

First of all, we should choose disease-free spinach seeds, when necessary, we can soak in warm water for an hour to disinfect, and appropriately increase the amount of sowing. The disease-carrying rate of the seeds propagated by diseased roots is also very high, so we must choose disease-free mother roots and add appropriate amount of borax to the base fertilizer, which can have significant disease resistance.

Chemical control of ②

In the early stage of the disease, biguanidine trioctylbenzene sulfonate, chlorothalonil, azoxystrobin, cuprous hydroxide, cuprous oxide and oxazolidone can be sprayed with water at the initial stage of the disease, and the control effect is better.

The above is the introduction of spinach stem blight control measures, hope to help you, want to know more related knowledge, please pay attention to us.