向日葵(Helianthus annuusL.)具有耐盐碱、耐瘠薄、抗干旱、适应性强等特性,许多国家广泛种植。特别是20世纪70年代初向日葵三系杂交种在生产上推广以来,在短短的30余年,向日葵种植面积和生产水平得到迅速增加和提高。近年来,随着播种面积的不断扩大,菌核病、霜霉病、锈病、黄 Sunflower (Helianthus annuus L.) has characteristics of resistance to salt and alkali, barrenness, drought resistance and strong adaptability, and is widely planted in many countries. Especially in the early 1970s three-line hybrid sunflower in the promotion of production, in just 30 years, sunflower acreage and production levels have been rapidly increased and increased. In recent years, with the continuous expansion of sown area, sclerotinia, downy mildew, rust, yellow