How does rose planting prevent powdery mildew? How to prevent and control powdery mildew in the rose season!

Powdery mildew in the lunar planting is the most serious hazard, so how to prevent powdery mildew in the planting of the rose? Next, Xiaobian will introduce you to the prevention and treatment of powdery mildew in the next month to help you better grow the rose.

Powdery mildew mainly harms the leaves, young shoots, flower buds and pedicels of the rose. After the young leaves are sick, the leaves shrink and curl into deformities, sometimes turning purple. Old leaves are susceptible, the leaves appear nearly round, watery chlorotic yellow spots, and when severely damaged, the leaves wither and fall off. The tender parts of the young shoots and peduncle are slightly enlarged, and the top is curved to the ground. After the flower bud is infested, it cannot be opened or deformed in flower shape, and the surface of the affected part is evenly covered with a white powder layer.

Control measures for powdery mildew in rose:

The application of nitrogen fertilizer should not be too much, and the amount of calcium and potassium fertilizer should be increased appropriately to make the plant grow stronger and enhance disease resistance.

Before germination, spray the tree to the generals to prevent virus replication and infection, prevent and cure various cortical diseases such as rot and ulcer, as well as anti-frost and anti-freeze effects.

At the beginning of the disease, a new high-fat film is sprayed with a targeted fungicide to prevent and control the effect.