Several common problems of western rhododendron

Rhododendron is a very valuable flower species in China, among the top ten famous flowers in our country. Recently, gardens have sprung up in our country, and rhododendron is officially an essential element.

Q: why do rhododendrons have reddish-brown spots?

A: with the rise of the tide of rhododendrons, the supply of naturally growing rhododendrons falls short of demand. at this time, people think of growing azaleas themselves, which can solve the problem that supply falls short of demand. only pay attention to how to cultivate more azaleas while ignoring whether the existing environment is suitable for rhododendron survival, but also ignore the measures to prevent and control diseases and insect pests This has led to the occurrence of reddish-brown spots in many azaleas, which is actually a kind of disease and insect pest.

Q: how can we tell if there are diseases and insect pests?

A: in fact, the occurrence of diseases and insect pests will be reflected on the leaves of the western rhododendron. If you observe carefully, you will find that the leaves at the bottom of the western rhododendron are most prone to diseases and insect pests, because those leaves are the oldest. The appearance of reddish-brown spots indicates that the western rhododendron is still in the early stage of the disease. If some measures are not taken to save the western rhododendron at this time, then the diseases and insect pests will become more and more serious. After that, it will change from a small reddish-brown spot to a round spot, and then it will become gray and white, and the leaves will fall off completely, affecting the growth of the western rhododendron, and of course, seriously affecting the ornamental value of the western rhododendron.

Q: will there be any improvement when watering with 1/4 of the standard ferrous sulfate, using ternary fertilizer every ten days, and astigmatism and ventilation?

A: there will be some improvement. Rhododendron grows better in slightly acidic environment and increases its own immunity. Water is usually neutral. Adding 1/4 ferrous sulfate to water will make the aqueous solution acidic, and the PH value is between 4 and 6, which is the most suitable environment for rhododendron growth. The application of three-yuan fertilizer can promote the growth of the western rhododendron, make its "bones" strong, the leaves can absorb nutrients, let itself grow thick and strong, but also improve its own immunity and resistance, in order to resist the occurrence of diseases and insect pests. Proper ventilation and sunlight can give the rhododendron a comfortable environment and drive away other bacteria, just as we humans need to open the window for ventilation when we are sick. The rhododendron also needs to give it ventilation and sunshine. This can improve its immunity, so that it is no longer in an environment full of bacteria, and sunlight exposure can also effectively carry out sterilization. It has a good cure effect on diseases and insect pests of rhododendron.