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Study on varietal preference and nutritional indices of tea looper Hyposidra talaca ( Lepidoptera : Geometridae ) on ten selected tea varieties
International Journal of Tropical Insect Science ( IF 1.1 ) Pub Date : 2021-03-23 , DOI: 10.1007/s42690-021-00502-x
Suman Sarkar , Azariah Babu , Kaushik Chakraborty , Bhabesh Deka , Bishwapran Kashyap , Biplab Adhikary

To find out the varietal preference of H. talaca larvae, leaves of ten selected tea cultivars were provided separately to II, III, IV, and V instars. The food consumption by different larval instars was the maximum on TV20 followed by TV1 > K1/1 > TV22 > TV26 > TV16 > SNT8 > TS520 > HP12 > B157. The nutritional indices showed the highest ECD and ECI values on TV20 followed by other cultivars. However, AD values were inversely proportional to the ECI and ECD. Biochemical analysis of the host leaves indicated higher carbohydrate and lipid concentrations in TV20 which was positively correlated (r = 0.6351) with the mean food consumption, whereas, the lowest carbohydrate and lipid concentration was observed in TS520. The levels of secondary metabolites such as alkaloids (r = -0.6137) and flavonoids (r = -0.7403) showed a negative correlation with larval food consumption. Results of HPLC analysis showed the presence of different types of catechins like, EGC, Catechin, EC, EGCG, ECG, and caffeine in variable quantity in all cultivars that were positively correlated with larval feeding except the Gallic acid which showed a negative correlation (r = -0.5610). Based on the larval food consumption, the susceptible index of cultivars were categorized as ‘highly susceptible’ (TV20, TV1, K1/1, TV22, TV26, TV16, and SNT8), ‘susceptible’ (TS520 and HP12), and ‘moderately susceptible’ (B157). Based on cluster analysis A1 grouped (TS520 and HP12), A2 indicated B157 whereas sub-branches B1 grouped (TV22, TV16, TV26, and SNT8) and B2 grouped (TV1, TV20, and K1/1).



中文翻译:

十个选茶品种loop瓜鳞茎品种的品种选育及营养指标研究。

找出H.talaca的品种偏好幼虫,分别向II,III,IV和V龄幼虫提供了10个选定茶品种的叶片。TV20上不同幼龄幼虫的食物消耗量最大,其次是TV1> K1 / 1> TV22> TV26> TV16> SNT8> TS520> HP12> B157。营养指数显示TV20的ECD和ECI值最高,其次是其他品种。但是,AD值与ECI和ECD成反比。寄主叶片的生化分析表明,TV20中较高的碳水化合物和脂质浓度与平均食物消耗呈正相关(r = 0.6351),而在TS520中观察到最低的碳水化合物和脂质浓度。次生代谢产物的水平,如生物碱(r = -0.6137)和类黄酮(r = -0.7403)与幼虫食物消耗呈负相关。HPLC分析结果显示,除没食子酸呈负相关外,所有与幼虫摄食成正相关的品种中都存在不同类型的儿茶素,如EGC,儿茶素,EC,EGCG,ECG和咖啡因。 = -0.5610)。根据幼虫的食物消耗,将品种的易感指数分类为“高度易感”(TV20,TV1,K1 / 1,TV22,TV26,TV16和SNT8),“易感”(TS520和HP12)和“中等”易感”(B157)。根据聚类分析,将A1分组(TS520和HP12),A2表示B157,而将子支行B1分组(TV22,TV16,TV26和SNT8),将B2分组(TV1,TV20和K1 / 1)。除没食子酸呈负相关外,所有与幼虫摄食呈正相关的品种中的咖啡因和咖啡因含量均呈负相关(r = -0.5610)。根据幼虫的食物消耗,将品种的易感指数分类为“高度易感”(TV20,TV1,K1 / 1,TV22,TV26,TV16和SNT8),“易感”(TS520和HP12)和“中等”易感”(B157)。根据聚类分析,将A1分组(TS520和HP12),A2表示B157,而将子支行B1分组(TV22,TV16,TV26和SNT8),将B2分组(TV1,TV20和K1 / 1)。除没食子酸呈负相关外,所有与幼虫摄食呈正相关的品种中的咖啡因和咖啡因含量均呈负相关(r = -0.5610)。根据幼虫的食物消耗,将品种的易感指数分类为“高度易感”(TV20,TV1,K1 / 1,TV22,TV26,TV16和SNT8),“易感”(TS520和HP12)和“中等”易感”(B157)。根据聚类分析,将A1分组(TS520和HP12),A2表示B157,而将子支行B1分组(TV22,TV16,TV26和SNT8),将B2分组(TV1,TV20和K1 / 1)。“易感”(TS520和HP12)和“中度易感”(B157)。根据聚类分析,将A1分组(TS520和HP12),A2表示B157,而将子支行B1分组(TV22,TV16,TV26和SNT8),将B2分组(TV1,TV20和K1 / 1)。“易感”(TS520和HP12)和“中度易感”(B157)。根据聚类分析,将A1分组(TS520和HP12),A2表示B157,而将子支行B1分组(TV22,TV16,TV26和SNT8),将B2分组(TV1,TV20和K1 / 1)。

更新日期:2021-03-24
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