Debnath Rahul, Mobarak Syed Husne, Mitra Paroma, Barik Anandamay
Ecology Research Laboratory, Department of Zoology, The University of Burdwan, Burdwan - 713 104, West Bengal, India.
Bull Entomol Res. 2020 Dec;110(6):756-766. doi: 10.1017/S0007485320000255. Epub 2020 Jun 2.
Diaphania indica (Saunders) (Lepidoptera: Crambidae) is an important phytophagous pest of Trichosanthes anguina L. in India. We studied life table parameters by age-stage, two-sex, amylolytic and proteolytic activities, and food utilization parameters of D. indica on the leaves of three T. anguina cultivars (Baruipur Long, Polo No. 1 and MNSR-1). Further, nutrients (total carbohydrates, proteins, lipids, amino acids and nitrogen) and antinutrients (total phenols, flavonols and tannins) in leaves were determined. The development time (egg to adult emergence) was the shortest on MNSR-1 (19.79 d) and the longest on Polo No. 1 (25.72 d). Fecundity was the highest and lowest on MNSR-1 (259 eggs) and Polo No. 1 (151.22 eggs), respectively. The lowest intrinsic rate of increase (rm) and net reproductive rate (R0) of D. indica on Polo No. 1 were 0.1112 d-1 and 27.22 offspring individual-1, respectively. The mean generation time (T) was the shortest on MNSR-1 (23.99 days) and the longest on Polo No. 1 (29.70 d). The larvae of D. indica fed with MNSR-1 had the highest level of amylolytic and proteolytic activities, and the lowest activities were in the larvae fed with Polo No. 1. The fifth-instar larvae fed with Polo No. 1 had the lowest consumption index and growth rate. The higher larval development time and lower fecundity of D. indica on Polo No. 1 were due to the lower level of nutrients and a higher level of antinutrients than other cultivars. Our results concluded that Polo No. 1 cultivar could be suggested for cultivation.
瓜绢野螟（桑德斯）（鳞翅目：草螟科）是印度蛇瓜上一种重要的植食性害虫。我们研究了瓜绢野螟在三个蛇瓜品种（ Baruipur Long、Polo No.1和MNSR - 1）叶片上的年龄 - 阶段、两性生命表参数、淀粉酶和蛋白酶活性以及食物利用参数。此外，还测定了叶片中的营养成分（总碳水化合物、蛋白质、脂质、氨基酸和氮）和抗营养成分（总酚、黄酮醇和单宁）。瓜绢野螟在MNSR - 1上的发育时间（从卵到成虫羽化）最短（19.79天），在Polo No.1上最长（25.72天）。产卵量在MNSR - 1上最高（259粒卵），在Polo No.1上最低（151.22粒卵）。瓜绢野螟在Polo No.1上的最低内禀增长率（rm）和净生殖率（R0）分别为0.1112 d-1和27.22后代个体-1。平均世代时间（T）在MNSR - 1上最短（23.99天），在Polo No.1上最长（29.70天）。取食MNSR - 1的瓜绢野螟幼虫淀粉酶和蛋白酶活性水平最高，取食Polo No.1的幼虫活性最低。取食Polo No.1的五龄幼虫消耗指数和生长率最低。瓜绢野螟在Polo No.1上幼虫发育时间较长且产卵量较低是由于其营养成分含量低于其他品种，而抗营养成分含量较高。我们的结果表明，可建议种植Polo No.1品种。
