Study on the time of prevention and control of anthracnose in Cymbidium

Anthrax is an important disease of Muran. Many books always say that prevention is more important than cure, which I agree with. However, the book always says rigidly that taking medicine every 7 to 10 days is very general. In fact, the onset time of anthrax is very regular, and blind medication is just a waste. As long as you pay attention to the time of prevention and control, you can save a lot of money.

The time of susceptibility can be calculated by observing the location of the diseased plants. in general, most of the locations of anthracnose infection are in the upper half of the leaves, but very few in the lower half. the upper part grows in the Meiyu season when the temperature is not very high from spring to early summer, and the lower part generally grows in the hot and humid summer and early autumn, and the onset time is usually in the dry months of late September and mid-October. Last year, we did such an experiment: we did not administer drugs in spring and summer, and we began medication and prevention in late August. It was found that it was already late in late August, and the disease spot could not be controlled at all. This year, from mid-April to mid-July, we should pay attention to regular medication, and after the middle of the year, we found that there were almost no diseases, which overturned the theory in many books that the incidence of high temperature and humidity was serious. It should be said that the incidence of anthrax is regular, timely medication is the foundation of prevention and treatment.

At that time, this view was discovered by a local orchid friend. he learned about the law of banana anthracnose from the prevention and treatment of banana anthracnose. The onset time of bananas was very similar to that of orchids. As a result, although the data were not enough, it has been confirmed for two years. It can be said that it is also feasible. You might as well express your views. (Wei Chang)