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病害识别正确识别蔬菜病害是做到准确、及时、有效防治的关键所在,因此,在识别病害时应把握以下五个方面。 1.识别时间:对于由真菌和细菌引起的病害,其最佳识别时间为空气相对湿度较大时,如温室和大棚应在放风前或晚间,叶片潮湿为宜;露地宜在早晨叶片结露或雨后。这样可明显看到病部霉层或病原菌的分泌物。
Disease identification Correct identification of vegetable diseases is the key to accurate, timely and effective prevention and treatment. Therefore, the following five aspects should be grasped when identifying diseases. 1. Identify the time: For the diseases caused by fungi and bacteria, the best time to identify the air when the relative humidity is greater, such as greenhouses and greenhouses should be before or at the time of windy, moist leaves is appropriate; exposed leaves should be dew condensation in the morning Or after the rain This can clearly see the disease mildew or pathogen secretions.