What are the common pests and diseases of yardlong beans? A detailed explanation of the latest control methods
Yardlong beans are a vegetable that many people enjoy eating very much, but when eating them you should pay attention to check whether the beans have gotten old, and you must not eat old yardlong beans! This is because old yardlong beans contain toxins, and eating them can cause poisoning symptoms such as vomiting and dizziness, and in severe cases shock. Growing yardlong beans is relatively easy, but they still cannot escape the harm of diseases, so what diseases can occur during the process of growing yardlong beans? How should they be controlled? Let's take a look together!
1. Fusarium wilt
Disease characteristics: Fusarium wilt mainly harms the roots, stems and leaves of yardlong beans. In the early stage of infection, the disease starts at the lower part of the plant, and water-soaked patches appear on the leaf margins. The patches gradually expand and extend until finally the entire leaf joins together to form a whole patch, and eventually the leaf withers and dies. In addition, cracks begin to appear at the root and stem area, the color gradually darkens, and when external humidity is too high, mold spots also appear on the patches.
Control methods: Continuous cropping must not be carried out on the same plot of land; crop rotation of at least two years must be ensured, and the rotation crops must not be legume crops. Improve the soil, neutralize soil acidity, and reduce pathogens. After the disease occurs, chemicals such as carbendazim wettable powder can be used for control, with the dosage determined according to the disease situation, at least once a week for one month.
2. Viral disease
Disease characteristics: Viral disease mainly harms the leaves of yardlong beans. After the leaves are infected, the color deepens locally on the leaves, the affected areas become uneven, and then begin to curl. Viral disease delays the flowering time, causing flowering times to be uneven, severely reducing pollination and fertilization rates, greatly affecting yield, and may even lead to total crop loss.
Control methods: When selecting varieties, choose disease-free, pest-free varieties with strong disease resistance. Observe more during the growing process, strengthen the use of chemical control, and improve the resistance of yardlong beans. Since the main vector is aphids, and aphids not only spread viral disease pathogens but also have a great impact on the crops themselves, we should also pay attention to aphid control. Reduce pathogen spread and lower the incidence rate.
3. Yardlong bean rust
Disease characteristics: Yardlong bean rust mainly also harms the leaves. When leaves are infected with yardlong bean rust, colored patches appear on the leaves. As time goes on, the color gradually deepens, and the affected parts also begin to bulge. The bulging areas are pathogen spores, and after the seed coat surface ruptures, red powder also appears.
Control methods: After harvesting the first crop of yardlong beans, thoroughly disinfect the garden, destroy the diseased plant residues, and keep them far away from the vegetable garden to avoid further spread. Choose varieties with strong disease resistance and appropriately apply chemical prevention to the plants.
The above are the diseases that often appear when growing yardlong beans. The most important thing to pay attention to when growing yardlong beans is disease control, because the harm of diseases is very great. In mild cases it leads to reduced yield, and in severe cases it causes total crop loss of yardlong beans, so everyone must do a good job of prevention and strengthen garden management so that your hard work will not be wasted. That is all for this article's introduction, please be sure to keep following the editor!