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编辑部:近年来,在一些老棉区,棉花“死棵”问题越来越严重,使不少棉农蒙受了损失。虽然也进行了防治,但还是一年重似一年,效果很不理想。据有关资料研究,近年来抗病抗虫棉种的推广,使棉花“死棵”的病害发生了变化,其中最主要的病害是卵菌属病害,60%～70%是由疫霉菌或腐霉菌等卵菌引起的。原来由真菌镰刀菌、立枯菌等引起的病害,虽然仍有发生,也较严重,但为害程度已被卵菌所取代。因此,棉花“死棵”应以苗期防治,以灌根或淋根为主,应选用杀卵菌更优秀的杀菌剂,如噁唑菌酮(抑快净)、丙森锌(安泰生),配合生根壮菌型2116,或应天2号效果更好。
Editorial Department: In recent years, in some old cotton areas, the issue of cotton has become more and more serious, causing many cotton farmers to suffer losses. Although prevention and treatment have also been carried out, it is still like a year a year, the effect is not satisfactory. According to relevant data research, in recent years, the popularization of disease-resistant and insect-resistant cotton varieties has changed the disease of cotton “dead tree”. The most important disease is Oomycetes disease, 60% -70% Or Pythium caused by Oomycetes. The original disease caused by fungal Fusarium, Rhizoctonia and other diseases, although still occur, but also more serious, but the degree of harm has been replaced by oomycetes. Therefore, the cotton “dead tree ” should be seedling prevention and control, in order to irrigate or root-based, should be used to kill more excellent fungicides fungi, such as famoxadone Antai Health), with strong root type 2116, or should be better on the 2nd.