小麦生育后期是指小麦抽穗至成熟这一时期,包括抽穗、开花、授粉、籽粒形成与灌浆等生育过程,历时40天左右,占小麦整个生育期的1/6左右。在河南此阶段一般在4月中下旬至6月初前后,是形成产量和影响品质的关键时期。此期常遇到高温、干旱、风雨、冰雹等灾害性天气和白粉病、锈病、赤霉病、叶枯病、黏虫、蚜虫、吸浆虫等病虫危害,若不能及时防治,将导致小麦倒伏、青干、籽粒瘪瘦变褐,产量和品质下降。为使小麦优质丰 Wheat later stage refers to the wheat heading to maturity during this period, including heading, flowering, pollination, grain formation and filling and other reproductive processes, which lasted 40 days, accounting for about 1/6 of the entire growing period of wheat. In Henan this stage generally in late April to early June before and after the formation of yield and quality of the critical period. This period often encounter high temperature, drought, wind, rain and hail and other disastrous weather and powdery mildew, rust, scab, leaf blight, armyworm, aphids, midge and other pests and insect pests, if not timely control, will lead to lodging of wheat , Dry green, brown and brown kernels, yield and quality decline. To make good quality wheat