What pesticide does Sanhua Li use?

Sanhua plum, a specialty agricultural product in Wengyuan County, Guangdong Province, passed the inspection of the former General Administration of quality Supervision, Inspection and Quarantine in 2010 and became a national geographical indication product of China. Sanhua plum fruit-shaped white through red, the entrance is not astringent and honey taste, crisp and sweet full of fragrance. So what kind of pesticides should be used when planting Sanhua plums?

What pesticides does Sanhua Li use?

Sanhua plum generally applies pesticides only when there are diseases and insect pests, and biological pest control measures are also used in general insect pests. The commonly used pesticides are Cuixi, prochloraz, copper oxychloride and dichlorvos, nitrilazole, Bordeaux liquid spraying, rapid culling (high toxicity), acetamiprid and other pesticides.

Cuixi and prochloraz are generally used when anthracnose occurs in Sanhua plum. The disease will lead to the death of the upper and lower branches of the affected part, the appearance of brown near-round spots on the fruit surface and the decay of the fruit. In addition, when anthracnose occurs in Sanhua plum, it should be combined with pruning to improve round permeability and remove diseased branches, withered branches and diseased fruits.

Copper oxychloride and dichlorvos are used when Sanhua plum has gum disease. When Sanhua plum appears this disease, transparent and soft gum will flow out one after another, and the cortex and xylem of the diseased part will turn brown and necrotic, which will lead to tree decline and death of some branches and even the whole plant. For treatment, 30% copper oxychloride + 80% dichlorvos (1:1) is required to be sprayed on the ground and tree trunks.

Nitrilazole is aimed at the powdery mildew of Sanhua plum. When powdery mildew occurred in Sanhua plum, the leaf front appeared amorphous chlorotic macula, the back of the leaf was covered with powdery mildew layer, and when the leaf was serious, the leaf dried up and fell off. Damage to young leaves can also cause deformities and distortions. After the occurrence of this disease, nitrilazole was generally sprayed 3 times in spring shoot emergence period and young fruit stage respectively.

Bordeaux liquid spraying is generally used to treat Sanhua plum bag fruit disease, this disease generally occurs in the backward flowers, the specific symptoms are that the leaves and branches become hypertrophic and twisted, the fruit is bluish white at the beginning, and then turns reddish brown to dark brown, and the fruit is seedless or small and partial to one side. Bordeaux solution was sprayed during treatment.

Quick culling (high toxicity) is aimed at the pests of Sanhua plum, and the main target is Sanhua plum scale insect, whose female adults and nymphs will prick and suck the sap of the branches, causing the tree to weaken until the branches die or even the whole plant dies. In general, the drug should be sprayed 3 times with 2mi, once every 10 days.

Acetamiprid is used to treat Sanhua plum aphids, the adults of aphids, nymphs gather tender branches and leaves, buds and fruits to suck juice, resulting in plant organ deformity, nutritional deterioration, slow growth or stagnation, soot disease and the spread of a variety of viruses. Spraying this pesticide can generally be carried out in the bud stage, after anthesis to early summer.

The above are the main types of pesticides that Sanhua plum needs to use. when using pesticides, we must carry out according to the specific symptoms of Sanhua plum, not at will.