Disease and Pest Control of Caragana

Diseases

The first one is called "leaf rust", which is a common disease and one we are more familiar with. As the name suggests, it mainly harms the leaves of plants. The disease is more likely to occur when too much nitrogen fertilizer is applied or when plants are very densely planted. When the disease occurs, the leaves will first be covered with small brown spots, which will then connect into one piece and then fall off. If left unchecked, the entire branch will dry up. The specific prevention and control method is: first, the affected branches and leaves should be cleaned off, preferably burned, to avoid threatening other parts. Then, spraying treatment is a more effective method.

The second disease is powdery mildew of the pollen stick, which causes the plant's young leaves to bend and the branches to turn yellow. If not treated in time, the strips will break. This disease is prone to occur when there is too much fertilizer, poor ventilation and an overly humid environment. To deal with this disease, we must first clean up the fallen leaves, cut off the diseased branches, and dispose of them in a centralized manner. Then we're going to use Baume lime sulfur mixture.

Pests

There is one main pest that can threaten plants, and that is the spring looper. The larvae will eat the flower buds, while the adults are mainly interested in the leaves. This pest reproduces and develops very quickly, and has a very large appetite, so the harm it causes is correspondingly greater. In severe cases, it may even lead to the death of the entire plant. To deal with this kind of insect, we should first dig deep into the soil, dig out the insect pupae that have hibernated or summered underground and kill them. Of course, we can also choose to kill them with insecticide emulsion.