Unverified85% confidenceFactTime unknown
选购杀虫用苦楝油应看印楝素含量：园艺级冷压原油通常标注1500-3000ppm，浓缩型可达10000ppm以上；标注'Clarified Hydrophobic Neem Oil'的产品印楝素几乎被去除，只靠油膜窒息杀虫，效果弱
1
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85%
Confidence
Long-term
Relevance
-
First Seen
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Unverified苦楝油防治病虫害的标准方案：初期发现虫害→选冷压高印楝素原油→按1-2%浓度加乳化剂稀释→傍晚全株叶正反面喷施→每7天一次连续3次→期间避开花期与授粉时段，兼具杀虫、拒食、抑制产卵三重作用74% similarUnverified纯精油即使标注可皮肤用，绝大多数也不能直接原液涂抹，需用基础油（荷荷巴/甜杏仁）稀释至1%-3%浓度（约每10ml基础油加2-6滴）74% similarUnverified油皮控油套装优先选含烟酰胺2%-5%、水杨酸0.5%-2%的水乳，避免含大量矿油和厚重乳木果的产品；控油不等于不保湿，油皮缺水时出油更严重，应选无油配方（oil-free）的凝胶质地保湿73% similarUnverified花生油对花生过敏人群禁用，且花生易受黄曲霉污染，购买花生油务必选正规品牌（黄曲霉毒素B1国标≤20μg/kg），不买散装小作坊花生油73% similarUnverified蕲艾（湖北蕲春产）挥发油含量普遍达1.0%以上，桉油精、樟脑等有效成分显著高于普通艾草（约0.5-0.7%），追求药用温经效果选蕲艾产地标注72% similar
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