Disease characteristics Both cucumber leaf blight and gray mold showed large lesions after the onset of the disease, and the lesions had a certain circle pattern. However, careful observation, there are still many differences between the two leaves: cucumber leaf blight disease lesions are less obvious, and the gray ring lesions more obvious ring; leaf blight leaf dip, more than the first leaf Starting from the edge, the diseased part forms a semicircle, or expands in a V-shape from the edge of the leaf, and the leaves of the gray mold become flooded at the beginning. The mesophyll tissue at the lesion is thin, and the lesion is more obvious. The ring pattern, when the humidity is high, is easy to perforate, and becomes brownish-brown spots in the late stage of the disease. It is irregular and has a small amount of gray powdery mildew, and the diseased part is not necessarily at the leaf margin. In addition, there are also differences in the occurrence of the two seasons, cucumber blight usually occurs in spring sowing, summer sowing cucumber heavier, while the cucumber gray mold is mostly in the greenhouse in the winter with low temperature and low temperature occurs. Control methods in the use of drug control, cucumber blight should generally use 75% chlorothalonil wettable powder 600 times, 25% sesoxystrobin gum suspension 1500 times, 10% difenoconazole dispersible granules 1500 Times of liquid, 70% thiophanate-methyl WP 500 times, etc., greenhouse greenhouse can be used 30% chlorothalonil smoke agent 250 grams per acre smoke, 7 to 10 days 1 application, continuous control 2 or 3 times. Cucumber gray mold medication generally choose 25% Amizyme suspension 1500 times, or Kaiser 1000 times, or 50% Huiyou WP 3000 times, or 50% Aolin suspension 1000 times. Small O2 N2 Generator,Nitrogen Generation System,Nitrogen Machine,O2 Generator Hangzhou Zhongju air separation equipment manufacturing Co., Ltd , https://www.hzzjkfzz.com
Seeing leaves to distinguish cucumber blight and gray mold
Right now, it is the greenhouse cucumber production season. In winter, there are many cold and sunny days, and there are also many diseases of cucumber. In particular, cucumber bacterial blight and gray mold have been heavier in recent years. In the early stages of these two diseases, symptoms began to appear from the leaves, and there were many similarities in the symptoms. There were often mistakes in the judgments, and they were not able to prescribe the right medicine and delay the timing of prevention and treatment.