MOHAN I. NAIKABHISHEK D. KATTEPPANAVAR2023-05-112023-05-112023-04-11Th-13648https://krishikosh.egranth.ac.in/handle/1/5810197240Studies on evaluation of commercial sex pheromone lures (Green revolution pheromone lure, Gaiagen pheromone lure, Pheromones chemical lure, Bio Phero PX lure) against diamondback moth, Plutella xylostella in cabbage were carried out in the farmers field around Hadonahalli village, Bangalore. Among the lures tested, Gaiagen lure shown the significant moth catches (2,218 moths/season, average of 277.25 moths/week). Diamondback moth larval activity initiated a week after transplanting, with peak incidence of 4.6 larvae per plant at head formation stage. The study showed positive correlation between the moth catches of the present week with the larval incidence occurred two weeks later. The highest cost-benefit ratio was recorded in Gaiagen lure (3.17). Followed by Among the five different commercial traps evaluated (Water trap, Delta trap, Funnel trap, Cross vane trap, Wing vane trap), the water trap recorded the highest number of moth catches of 1052 moths per season with an average of 131.5 moths/week, with a Cost Benefit ratio of (3.07). The standardisation of trap timing experiment revealed that, treatment on the day of transplanting recorded 1913 moths per season with a least larval incidence of 1.42 larvae per plant. Treatment on the day after transplanting recorded 71 per cent grade “A” cabbage heads with a yield of 28.55 t/ha and a highest Cost benefit ratio (7.33). On the 30th day after transplanting had a least effect on the yield (20.05 t/ha) of cabbage and also recorded highest percentage (24%) of grade “C” heads.EnglishThesis