大蒜锈病病害症状



大蒜植株经常遭受锈病的侵扰，这种病害主要targets叶片和假茎。Initially，病斑呈现as狭长形，叶片颜色fades to a pale green. 在病斑的表面，可以注意到round或ovale夏孢子堆，它们slightly protrude，呈现an橙黄色。当the表皮breaks open，these夏孢子scatter，形成明显的橙黄色powder状物质。病斑的edge通常forms一个yellow晕圈，as time goes by，the病斑continues to expand，causing the entire leaf to turn yellow，even withering. Affected plants suffer severe growth interference，prematurely entering a withering stage. 在病害later stages，未破裂的夏孢子堆forms black冬孢子堆，这些冬孢子堆通常form under the surface，further exacerbating the plant's symptoms. This rust disease not onlyimpacts the appearance of大蒜 but also disrupts its growth cycle，therefore，对于growers，timely identification and implementation of effective control measures is crucial. 大蒜锈病 is one of the common diseases in大蒜，普遍发生 in various vegetable-growing areas，主要危害露天cultivated大蒜，大葱，香葱，洋葱等. Early spring low temperatures，abundant rain，or rainy periods during the Plum Blossom Festival，or autumn with excessive fog and rain，result in higher disease incidence. Severe infections can lead to densely packed blister-like spots on leaves，directly affecting leaf yield and quality，and indirectly impacting garlic bulb production.