How to control pseudocercospora brown spot?

Symptoms: mainly damage to leaves. The leaf initially appears chlorotic macula, the edge boundary is not clear, and then oval or oval yellowish brown disease spot appears on some macula, the edge is dark brown, the boundary is clear. There is a broad yellow halo in the periphery, and a thin mildew layer appears on the spot in the later stage.

Prevention and treatment:

① should strengthen management, properly remove branches and leaves, improve permeability, collect disease residues and burn them.

② spray to prevent and control disease. The medicament can be used with 30% copper oxychloride suspension + 70% mancozeb wettable powder (1:1) 800x liquid, or 75% chlorothalonil + 70% topiramate 1000mg 1500x liquid, or 10% carbendazim milk powder 400x liquid, or 40% triadimefon carbendazim 1000g 1500x liquid, or 50% carbendazim wettable powder 800g 1000x liquid, or 40% Fengnong wettable powder 500g 600x liquid. Once every 10 to 15 days, apply alternately and spray thoroughly.

What is false tail brown spot of chrysanthemum and the prevention and control method of it?

Chrysanthemum chooses to open in autumn, but it is special. Chrysanthemum is of noble quality and is favored by people, so what about pseudotaurosporum brown spot of chrysanthemum? The following is to introduce the prevention and control methods of chrysanthemum false tail spore brown spot.

Symptoms of pseudotaurospora brown spot of chrysanthemum

The disease spot is born on both sides of the leaf, nearly round, the initial edge is not obvious, and then sometimes give birth to a dark brown fine coil, often along the edge of the leaf. The foliar disease spot is light yellow at the beginning, brown to dark brown in the later stage, and grayish brown on the back of the leaf.

Characteristics of brown spot of chrysanthemum morifolium

The disease is caused by fungi, and the pathogen is pseudocercospora chrysanthemum. The pathogen overwintered on the diseased body, carried out primary infection and re-infection with conidia, and spread by airflow and Rain Water sputtering. It is easy to get sick in rainy or foggy weather.

Physical Control of Brown spot of Chrysanthemum morifolium

Combined with picking leaves to collect diseased remains, take them out of the field and burn them out; clear ditches and drain water, avoid partial application of nitrogen fertilizer, make plants grow healthily and enhance resistance.

Chemical control of false tail brown spot of chrysanthemum

At the initial stage of the disease, 50% propofol wettable powder was sprayed 1000 to 1500 times, 50% carbendazim wettable powder 500 times per mu, 100 ml per plant, once every 7 to 10 days, two or three times in succession; with 75% chlorothalonil wettable powder 147g / mu, 75 liters of water, evenly sprayed.

Control of pseudotail brown spot of chrysanthemum (Dendranthema morifolium (Ramat.) (Tzvel.): perennial root herbs of Compositae and Chrysanthemum in plant taxonomy. According to the cultivation form, it can be divided into multi-head chrysanthemum, single chrysanthemum, big chrysanthemum, cliff chrysanthemum, art chrysanthemum, desk chrysanthemum and other cultivation types; according to the appearance of petals, it can be divided into garden hug, back hug, random hug, open heart hug, flying noon hug and other cultivation types. Different types of chrysanthemums are named after a variety of varieties.

Control of false tail brown spot of chrysanthemum 1. The symptoms of the disease are on both sides of the leaf, nearly round, the initial edge is not obvious, and then sometimes produce dark brown thin loops, often growing along the edge of the leaf. The foliar disease spot is light yellow at the beginning, brown to dark brown in the later stage, and grayish brown on the back of the leaf. 2. the disease is caused by fungi, and the pathogen is pseudocercospora chrysanthemum. The pathogen overwintered on the diseased body, carried out primary infection and re-infection with conidia, and spread by airflow and Rain Water sputtering. It is easy to get sick in rainy or foggy weather. 3. Prevention and control methods (1) Horticultural control: combine picking leaves to collect diseased bodies and take them out of the field to burn; clear ditches and drain water, avoid partial application of nitrogen fertilizer, make plants grow healthily and enhance resistance. (2) Chemical control: at the initial stage of the disease, 50% propofol wettable powder was sprayed 1000 to 1500 times, 50% carbendazim wettable powder 500 times per mu, 100 ml root irrigation per plant, once every 7 to 10 days, two or three times; with 75% chlorothalonil wettable powder 147 grams per mu, 75 liters of water, evenly sprayed.