부산대학교 도서관

Nine genotypes of kale (Brassica oleracea var. acephala) were evaluated for their oviposition preference and performance against Plutella xylostella based on their nutritional indices and oviposition decisions. Nutritional parameters in the fifth larval instar were measured using leaves of nine genotypes in petri dishes. Oviposition preferences on kale genotypes were studied using P. xylostela adults in an oviposition cage, adult moths were fed a 10% honey-water solution, with fresh kale leaves offered every two days until oviposition. Regarding the nutritional indices, our study found that fifth instar larvae showed the highest values for consumption index (CI ) on KALE-3 (1.23 ± 0.23 g/g/day) and lowest on KL-1 (0.34 ± 0.11 g/g/day). The highest approximate digestibility (AD) (88.25 ± 0.07%) was found on KALE-21 and lowest on KL-1 (39.62 ± 0.09%). The highest efficiency of conversion of digested food (ECD) and efficiency of conversion of ingested food (ECI) was found on the KL-1 genotype (94.93 ± 0.25%; 85.48 ± 0.17%), respectively while the lowest values were found on KL-8 (22.53 ± 0.14%) and KALE-3 (21.57 ± 0.08%), respectively. The highest Growth rate (GR) was recorded on KL- 1 (0.92 ± 0.06 g/g/day) and the lowest on KALE-3 (0.24 ± 0.13 g/g/day). Similarly, under choice tests P. xylostella showed the highest oviposition on KL-1 (77.80 ± 4.4), while as lowest on KALE-3 (11.8 ± 2.6), and in no-choice tests highest number of eggs was observed on KL-1 (295.80 ± 3.3) and KL-2 (257.80 ± 7.1) and the lowest number of eggs on KALE-21 (13.20 ± 3.0). Together, KALE-3 and KL-8 were found to be most resistant and KL-1 was found to be the most susceptible genotype against P. xylostella. This information will act as baseline work for all researchers across the globe as such a study was lacking for P. xylostella on kale.