翅果油树重要害虫榆兴透翅蛾成虫触角的超微结构

榆兴透翅蛾(Synanthedon ulmicola)是危害翅果油树的重要检疫性害虫。以榆兴透翅蛾成虫为研究对象,利用扫描电镜对榆兴透翅蛾成虫触角感器的类型、形态、分布进行观察。结果表明:榆兴透翅蛾成虫触角为栉齿状,由柄节、梗节、鞭节三部分组成,鞭节数量为56~58小节。共发现8种感器类型,分别为B9hm氏鬃毛、毛形感器(ST-I、ST-II、ST-III)、鳞形感器、刺形感器、锥形感器、腔锥形感器、耳形感器I(SAu-I)、栓锥形感器。其中毛形感器数量最多,分布最广,锥形感器数量最少,仅有2~3处分布。除毛形感器III仅分布于雄蛾触角外,其余种类的感器在雌、雄蛾触角上均有分布。在感器形态上,鳞形感器端部具有明显的雌雄二型现象,其余感器在形态上无较大差异。通过测定不同类型感器的长度、基宽,明确了各种类型感器的性二型差异。

Lee discrepancy on asymmetrical factorials with two-and three-levels

Lee discrepancy has been employed to measure the uniformity of fractional factorials.In this paper,we further study the statistical justification of Lee discrepancy on asymmetrical factorials.We will give an expression of the Lee discrepancy of asymmetrical factorials with two-and three-levels in terms of quadric form,present a connection between Lee discrepancy,orthogonality and minimum moment aberration,and obtain a lower bound of Lee discrepancy of asymmetrical factorials with two-and three-levels.