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 科学化控化控时间一般为玉米展开叶6~13片为宜,而8~13片展叶时其效果最佳。在玉米的6叶期前,此时玉米的叶片细长、叶面光滑。当玉米展开7叶期时,就会变得宽厚,叶面上会出现细小的白软毛,用手背可以感觉到,此时便是喷施化控药剂的最佳时期。喷施药剂首选智控促花王可控制枝条疯长,迫使顶梢旺盛营养大量回流,其主干主力营养转向发育系统,提升玉米生长活力。     追施穗肥穗期对矿物质养分的吸收量最多、吸收强度最大,是玉米吸收养分最快的时期,也是一生中最重要的施肥时期。大喇叭口期追施氮肥可有效促进雌穗小花分化,实现穗大粒多。一般每亩可追施尿素或氮钾复合肥20~25公斤。追肥方式可在行侧开沟或在植株一旁开穴深施,最好结合灌溉或在有效降雨期间施用,切忌在土壤表面撒施,以防造成肥料损失。

    加强病虫害防治夏玉米穗期的病虫害应重点防治褐斑病和玉米螟。褐斑病可采用新高脂膜配合杀菌剂叶面喷雾进行防治;玉米螟可在大喇叭口期用新高脂膜配合针对性杀虫剂心叶喷雾进行防治,可屏蔽害虫嗅觉,抑制病菌复制,降低其抗药性和用药量,提升农药效果。