中文摘要：

欧洲葵螟Homoeosoma nebulellum Hübner是取食向日葵花盘和种仁最为猖獗的害虫。为明确不同向日葵品种开花物候期和抗虫性之间的关系,选取了12个代表性的向日葵品种（其中食葵9个,油葵3个）,在田间调查各品种开花期,在生理成熟期采用籽粒被害虫情指数评价品种的抗虫性。结果表明：在所选的12个向日葵品种中,开花期处于R5.1～R5.2阶段（筒状小花开放率在10%～20%）的品种适逢葵螟成虫羽化、产卵高峰期,其受害程度显著高于处于其他花期阶段的向日葵品种。此外,前期鉴定出的高抗油葵品种MGS,由于开花期处在R5.2阶段,所以在本试验中的籽粒被害虫情指数较高;而高感食葵品种星火因尚未进入开花期,其籽粒被害虫情指数最低。因此,实践中在制定播种期时应根据不同向日葵品种开花物候期的差异,合理避开成虫发生高峰期,以减轻向日葵螟的为害。

英文摘要：

European sunflower moth Homoeosoma nebulellum Hübner is the most serious pest on sunflower and seeds. To better understand the relationship between plant flowering phenology and host plant resistance to H.nebulellum,experiment was conducted to evaluate infestation index of seed from 12 typical sunflower accessions in field. Results showed that sunflowers during R5. 1 to R5. 2 flowering stages（ opened tubular florets accounting for10- 20% of the whole head） were damaged more heavily than those at other flowering stages. The reason could be the coincidental occurring of R5. 1- R5. 2 flowering stage and the peak of adults moth emergence and oviposition.Oilseed material MGS,identified with higher resistant to sunflower moth,conversely showed higher infestation index of seed than others as its flowering stage was in R5. 2 flowering stage. On the contrary,confection cultivar Xinghuo,identified with higher susceptibility,exhibited the lowest infestation index of seed due to its delayed flowering stage. Therefore,planting time should be take into consideration to avoid the occurrence of adults moth and to alleviate its damage.