新壮态植物生长促进液对棉花枯萎病的防治作用

2015-2016年于室内采用菌丝生长速率法、凹玻片法等方法测定新壮态对棉花枯萎病菌的抑制作用;并于河南安阳枯萎病人工病圃和温室研究了新壮态对棉花枯萎病的防治效果。结果表明:新壮态能显著抑制棉花枯萎病菌菌丝生长和分生孢子萌发,当新壮态浓度为10.0%时,抑制率分别为100.0%和93.1%;4.0%~8.0%的新壮态能显著抑制枯萎病菌产孢量。0.25%和0.5%的新壮态浸种能显著增加棉花的株高和芽长。在棉花枯萎病人工病圃,叶面喷施10.0%的新壮态稀释液5次对棉花枯萎病的防治效果最好,达68.8%;在温室内,用1.75%的新壮态灌根5次,防治效果达64.5%。本研究表明,在棉花枯萎病发生前用新壮态喷施或灌根对棉花枯萎病具有较好的防治效果。

Xinzhuangtai as a plant growth promoting fluid against cotton Fusarium wilt in Gossypium hirsutum

During 2015-2016, inhibition activities of a commercial product Xinzhuangtai to Fusarium oxysporum f.sp. vasinfectum were tested using mycelium growth rate and concave slide methods. Control efficacy of Xinzhuangtai on cotton Fusarium wilt were also investigated in the greenhouse and the artificial disease nursery, located in Anyang, Henan Province. The results showed that 10.0% Xinzhuangtai dilution could significantly inhibit the spore germination and mycelia growth, with the inhibition rates of 100.0% and 93.1%, respectively. Compared with untreated control, Xinzhuangtai dilution at the concentration ranged from 4.00% to 8.00% had significant effect on spore production. Seed-soaking with 0.25% or 0.5% Xinzhuangtai dilution could significantly promote plant height and shoot length of cotton seedling. Foliage spraying with 10.0% Xinzhuangtai dilution for 5 times in the artificial disease nursery could significantly reduce the disease index, with the control efficacy of 68.8%. Root drenching with 1.75% Xinzhuangtai dilution for 5 times in the greenhouse could significantly reduce the disease index, with the control efficacy of 64.5%. These results suggest that foliage spraying or root drenching with Xinzhuangtai can control Fusarium wilt.