Cloning and Expression Analysis of Gene nm23 during Ovarian Development of Portunus trituberculatus The relationships between yeast-like symbiotes and ovarian development and reproduction of the small brown planthopper, Laodelphax striatellus Effect of adult nutrition and mating on ovarian development and vitellogenesis in the endoparasitoid, Pteromalus puparum Ovarian development and oogenesis of Harmonia axyridis Pallas Analysis on the population status of the beet armyworm, Spodoptera exigua (Hübner) in Fengxian, Jiangsu Province, China