The "yellow head" produced by the lack of zinc and iron in greenhouses suggests that the use of trace fertilizers should be paid attention to in base fertilizers. For example, about 2 kg of ferrous sulfate and 1-2 kg of zinc sulfate per mu can be used. After the symptoms appear, spraying foliar fertilizer containing zinc and iron in time can relieve this symptom. Root injury, caused by the "yellowhead" suggested to reduce the amount of watering, to pour water, fertilizer to raise the roots and protect the manure bacteria, humic acid fertilizer or Apollo 963 chitin fertilizer, so that the cucumber roots Restore normal growth as soon as possible, so that the leaves turn green. Infection and disease caused by cucumber "yellowhead" can be sprayed thiophanate-methyl or carbendazim plus Baitai or acetaminophen and other agents for prevention and treatment. Electric Eyebrow Remover,Electric Eyebrow Trimmer,Automatic Eyebrow Trimmer,Best Electric Eyebrow Trimmer Shenzhen Jie Zhong Lian Investment Co., Ltd. , https://www.szmeizonscares.com