FAUNASTIC STUDIES ON NATURAL ENEMIES OF FALL ARMYWORM, Spodoptera frugiperda (J. E. SMITH) (LEPIDOPTERA: NOCTUIDAE) WITH SPECIAL REFERENCE TO EVALUATION OF EGG PARASITOIDS
| dc.contributor.advisor | ARUNKUMAR HOSAMANI | |
| dc.contributor.author | VEENA K | |
| dc.date.accessioned | 2023-12-26T17:45:14Z | |
| dc.date.available | 2023-12-26T17:45:14Z | |
| dc.date.issued | 2023-12-26 | |
| dc.description.abstract | Faunastic studies on natural enemies of fall armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) with special reference to evaluation of egg parasitoids were carried out at MARS, UAS, Raichur during 2019-20. Roving survey conducted in five major districts of North Eastern Karnataka viz., Ballari, Kalaburgi, Koppal, Raichur and Yadgir and 18 natural enemies were recorded on fall armyworm (FAW) viz., Trichogramma sp. (42.65 %), Telenomus sp. (29.37%), Chelonus sp. (0.17 %), C. formosanus (0.96 %), Coccygidium sp. (2.48 %), Cotesia sp. (0.21 %), C. chloridae (0.21 %), unidentified ichneumonid (0.26 %), Euplectrus sp. (0.08 %), E. xanthaspis (18.43 %), Archytus sp. (0.39 %) and two entomopathogens viz., M. rileyi (7.51 %) and SpfrNPV (2.79 %). The biology studies of four different egg parasitoids viz., T. pretiosum, T. chilonis, T. bactrae and T. remus revealed that the highest developmental period of 10.00 ± 0.05 was noticed in T. remus followed by T. chilonis (9.30 ± 0.32 days) and T. pretiosum (9.00 ± 0.02 days). Highest adult longevity was noticed in T. remus (8.10 ± 0.01 and 11.58 ± 0.51 days) followed by T. chilonis (6.02 ± 0.19 and 8.20 ± 0.80 days) for both male and female. The impact of age of the host egg (24, 48 and 72 h) revealed that the parasitoids preferred freshly laid eggs (24 h old) for parasitisation. The highest parasitism was observed in T. pretiosum (97.40 %) followed by T. chilonis (97.00 %). The maximum adult emergence was noticed in T. chilonis on 24 h old eggs (98.96 %) and it declined as the age of the host egg advanced. Similarly the influence of age of the female parasitoid over parasitisation revealed that one day old females recorded maximum parasitism (98.60 %) and adult emergence (98.97 %) in T. pretiosum, while in T. remus, the highest rate of parasitism and adult emergence was noticed in six day female (83.80 and 98.79 %). The evaluation of different densities (50,000, 1,00,000 and 1,50,000/ha) of T. pretiosum to contain the S. frugiperda in maize revealed that the release of 1,00,000 parasitoid per hectare was the most suitable for its effective management. | |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810204531 | |
| dc.language.iso | English | |
| dc.pages | 120 | |
| dc.research.problem | FAUNASTIC STUDIES ON NATURAL ENEMIES OF FALL ARMYWORM, Spodoptera frugiperda (J. E. SMITH) (LEPIDOPTERA: NOCTUIDAE) WITH SPECIAL REFERENCE TO EVALUATION OF EGG PARASITOIDS | |
| dc.sub | Agricultural Entomology | |
| dc.theme | FAUNASTIC STUDIES ON NATURAL ENEMIES OF FALL ARMYWORM, Spodoptera frugiperda (J. E. SMITH) (LEPIDOPTERA: NOCTUIDAE) WITH SPECIAL REFERENCE TO EVALUATION OF EGG PARASITOIDS | |
| dc.these.type | M.Sc | |
| dc.title | FAUNASTIC STUDIES ON NATURAL ENEMIES OF FALL ARMYWORM, Spodoptera frugiperda (J. E. SMITH) (LEPIDOPTERA: NOCTUIDAE) WITH SPECIAL REFERENCE TO EVALUATION OF EGG PARASITOIDS | |
| dc.type | Thesis |