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来自MSN
3 个月
蔬菜种子,农家几乎都是自己留种,苦瓜老品种味道纯正
蔬菜留种都是选择长势好、个大、无虫害、果实饱满的瓜果以及种子,苦瓜留种时,通常会选择留种2-4个,选择底部头茬果子,个大的,成熟时 ...
来自MSN
4 天
百合有哪些病虫害,应如何防治
花叶病:病发时叶片上出现深浅不均匀的褪绿斑或枯斑,留种繁殖时选择无病毒的,病株出现需及时拔掉。斑点病:后期严重时,整个叶片变黑枯死,需及时摘除发病的叶片,染病后用代森锌。蚜虫:主要是危害百合的嫩叶、茎秆,冬季清除旁边杂草,危害期间喷洒氧化乐果1200 ...
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