Bacterial leaf spot of green radish

[symptoms] at the initial stage of the disease, water-stained necrotic spots appeared on the green radish leaves, and the later diseased spots gradually turned dark brown, and there were often concentric wheel lines and yellow edges on the diseased spots. after the green pineapple was infected by bacterial leaf spot, the ornamental value decreased greatly.

[pathogen and incidence regularity] is a bacterial disease, the pathogen is Pseudomonas chrysanthemum, most of the bacteria survive in the soil and are generally spread by watering and splashing and friction with healthy leaves on the disease mouth. The disease often occurs in the period of hypothermia.

[prevention and control methods]

1. Remove the diseased leaves in time and burn them centrally.

2. Drug prevention and treatment: it can be foliar sprayed with 4% ammonia copper solution, 60% ethyl phosphorus aluminum wettable powder, 77% or 72% agricultural streptomycin wettable powder 4000 times. 0.1% potassium permanganate solution can also be sprayed during family prevention and treatment.

Control of bacterial leaf spot of Rosa verticillata

Green radish bacterial leaf spot is one of the common diseases of green pineapple. It mainly harms the leaves of green radish and affects its ornamental.

Symptoms:

Bacterial leaf spot at first showed a flood-like necrotic spot on the leaf, and then quickly turned dark brown, with bright and dark concentric lines on the spot and yellow halo on the periphery.

Pathogen

The leaf spot disease of Pseudomonascichoric (Swinhle) Stapp is called Pseudomonas chicory, which belongs to bacteria. The mycelium is rod-shaped, with many polar flagella.

Route of infection:

The pathogen of green radish leaf spot survived in the soil, mainly through water droplet sputtering or friction between leaves, the pathogen invaded through wounds or water holes, the suitable temperature was 17-23 degrees, and the disease occurred mostly in low temperature period.

Prevention and control:

one. Cut off the diseased spot or leaf in time at the initial stage of the disease.

two. At the initial stage of adult disease, 350-fold solution of 14% complexing ammonia copper solution was sprayed once every 7 to 10 days, and continuous prevention and treatment was carried out for 2 times.

Control methods of bacterial leaf spot of Rosa verticillata

Green radish bacterial leaf spot is one of the common diseases of green pineapple. It mainly harms the leaves of green radish and affects its ornamental.

Symptomatic bacterial leaf spot initially showed a flood-like necrotic spot on the leaf, and then quickly turned dark brown. There were concentric patterns of light and dark on the spot, and yellow halos on the periphery.

The pathogen of leaf spot disease of Pseudomonascichoric (Swinhle) Stapp is Pseudomonas chicory, which belongs to bacteria. The mycelium is rod-shaped, with many polar flagella.

The pathogen of green roach leaf spot survived in the soil, mainly through water droplet sputtering or friction between leaves, the pathogen invaded through wounds or water holes, and the optimum temperature was 17-23 degrees.

Prevention and cure method

1. In the early stage of the disease, cut off the diseased spot or the diseased leaf in time.

two。 At the initial stage of adult disease, 350-fold solution of 14% complexing ammonia copper solution was sprayed once every 7 to 10 days, and continuous prevention and treatment was carried out for 2 times.