Prevention and cure method

(1) Spray 500-600 times solution of 36% thiophanate methyl suspension or 50% benomyl wettable powder 1500 times solution, 800 times solution of 60% mildew-proof ultrafine wettable powder, 500 times solution of 50% copper succinate wettable powder, 400 times solution of 30% basic copper sulfate suspension, and 47% at the initial stage of the disease.

(2) Apply fully decomposed organic fertilizer to improve the disease resistance of the host.

Symptoms:

Mainly harmful to leaves.

The leaf spot is oval, 2 ~ 3mm in size, grayish brown in the middle and brown to reddish brown in the edge.

In the later stage, small black spots, that is, conidia of the pathogen, are produced on the diseased spots.

Pathogenic characteristics:

Pholiota adiposa is a fungus belonging to Hemiptera subfamily.

Conidia are scattered on both sides of the leaves, breaking through the epidermis, spherical to oblate, with brown walls and membranous, with a size of 53 ~169 μ m.

The organelles are oval, colorless and transparent, with round ends, and the size is 3.5 ~ 8.8× 1.4 ~ 4.4 (micron).

The optimum growth temperature of the pathogen is 25 ~ 30℃, the highest is 35 ~ 40℃, and the lowest is 10 ~ 15℃.

Pathogenic conditions:

The pathogen mainly overwinters on the remnants of diseased plants with conidia.

Conidia were produced in the following spring, and spread by wind and rain, and they were primarily infected and reinfected.

In rainy years and rainy seasons, lack of fertilizer is easy to get sick.