Common Diseases and Control of Jasmine
A comprehensive explanation of the experience of the Flower Clinic regarding jasmine, common diseases and control of jasmine, which will certainly help you. Let's learn about it together!
White绢 Disease
Symptoms
Usually occurs at the base of the stem. The infected plant turns brown and rots, the diseased part's epidermis is easy to peel off, and white silk-like mycelium appears on the surface. In the later stage, rapeseed-like sclerotia grow on the diseased part. The pathogen overwinters in the soil or on the diseased residues in the form of sclerotia or mycelium. It is prone to repeated infections during May to June and August to September when there is abundant rain.
Control Methods
(1) Timely remove the diseased plant residues and destroy them集中.
(2) Strengthen management, strict quarantine, and eradicate the source of the disease.
(3) At the beginning of the disease, disinfect the surrounding soil with 70% pentachloronitrobenzene medicated soil, or spray 1% Bordeaux mixture or 0.3 degree Baumé lime sulfur mixture, or 50% wettable demethylation medicated soil for prevention and control. When the disease is severe, spray 75% chlorothalonil wettable powder 800 to 1000 times liquid, or 65% mancozeb wettable powder 800 times liquid.
(4) Use 82 Trichoderma gluten biological preparation, mixed with fine soil, and mixed into the pot soil.
(T-J) Disease
Symptoms
It mainly harms the leaves and sometimes the young shoots. Initially, small light green to yellow spots appear on the leaf surface, which gradually expand into gray-brown or off-white circular or near-circular spots. Black dots are scattered on the lesions in the later stage. The pathogen overwinters on the affected leaves in the form of conidiomata and mycelium.
Usually, the disease is more serious in summer and autumn.
Control Methods
(1) Strengthen cultivation management, timely remove and destroy diseased leaves.
(2) Spray 2 to 3 times with 70% Lexar 600 to 800 times at the beginning of the disease, once every 7 to 10 days. At home, 0.1% mercuric water or gentian violet solution can also be applied.
(3) When the disease is severe, spray 50% thiophanate-methyl or 75% chlorothalonil wettable powder 800 to 1000 times liquid, or 50% carbendazim 1000 times liquid, 65% mancozeb 500 times liquid.
Leaf Spot Disease
Symptoms
Usually occurs on the leaves. Initially, brown spots appear on the leaves, which gradually expand into circular or irregular shapes, the diseased part becomes thin and translucent, and black granular substances grow on the spots. The pathogen overwinters on the diseased leaves in the form of mycelium or conidiomata. It usually occurs from May to June and peaks from July to August.
Control Methods
(1) Timely cut off and destroy the diseased leaves.
(2) Reduce nitrogen fertilizer and increase phosphorus and potassium fertilizers.
(3) Spray 70% Lexar 600 to 800 times liquid at the beginning of the disease, once every 7-10 days, or 65% mancozeb 600 to 800 times, or 1:1:100 1% equal amount Bordeaux mixture.
Soot Disease
Symptoms
Initially, dark brown mold spots appear on the leaves, which gradually expand to form a black sooty mold layer. This disease is caused by the excrement of aphids and scale insects leading to bacterial multiplication.
Control Methods
(1) Strengthen management and improve ventilation conditions.
(2) Timely eliminate aphids and scale insects.
(3) Spray 160 times equal amount Bordeaux mixture before the onset of the disease; at the beginning of the disease, spray 50% carbendazim wettable powder 800 to 1000 times liquid.
The above [] introduces a comprehensive introduction to the common diseases and control of jasmine, hoping to bring some knowledge about green plants to green plant enthusiasts.