STUDIES ON MANGO LEAFHOPPERS (HOMOPTERA: CICADELLIDAE) WITH SPECIAL REFERENCE TO SEASONAL ABUNDANCE, VARIETAL INFLUENCE AND MANAGEMENT IN NORTH-EASTERN TRANSITION ZONE OF KARNATAKA
| dc.contributor.advisor | PRAMOD KATTI | |
| dc.contributor.author | RAJKUMAR M | |
| dc.date.accessioned | 2023-12-04T16:44:12Z | |
| dc.date.available | 2023-12-04T16:44:12Z | |
| dc.date.issued | 2023-12-04 | |
| dc.description.abstract | The leafhoppers alone can cause 20-100 per cent inflorescence loss in mango during vegetative and reproductive phases of the tree. They have different species composition across the mango growing area. The survey conducted across the different location of the mango growing in Karnataka during 2016-17. The Shannon diversity index indicated that diversity at surveyed places as Brahmavara (0.61), Bidar (0.60) and Shivamogga (0.56), in contrary least was observed within Gadag (0.35), Kolar (0.39) and Dharwad (0.41) district of the Karnataka. The dominance of the leafhoppers by Simpson index recorded that highest was in Brahamavara and Bidar i.e 0.32 each and lowest dominance was in Gadag (0.16), Kolar (0.19) and Dharwad (0.20). The richness by Margalef’s index displayed highest was in Belagavi (0.59) and Shivamogga districts (0.56), and least was observed in other districts ranged from 0.36 to 0.41. Based on the maximum availability, the ranking was made as follow; Idioscopus nitidulus>Amritodus atkinsoni>Idioscopus nagpuriensis>Idioscopus clypealis. In the present experiment different leafhoppers populations were monitored on the mango tree Kesar at College of horticulture, Bidar, during 2015-17 revealed that the I. nitidulus was more (4.68 per sweep), followed by A. atkinsoni (3.65) and lastly I. nagpurensis (3.23). During 2015-16, weather parameters such as maximum temperature and relative humidity (RH) showed significant positive correlation (r=0.59 to 0.74). Similarly, in 2016-17, wind speed showed positive significant correlation (r=0.57 - 0.62) and no such relation were observed with other climatic factors. The varietal observations imply, the varieties like Raspuri, Langra and Kesar were infestated by moderate number of leafhoppers. The leafhoppers mean population were highest during the fruiting period in the varieties such as Dasheri, Mulgoa, Neelum and Alphanso. The biochemical study shows that, the highest quantity of phenol was observed in Mallika, Totapari, Mulgoa and the least was in Rasapuri and Baneshan. Maximum total sugar was in Dasheri and Baneshan. Regarding total soluble protein, maximum was in Alphanso, Mulgoa and Neelum varities and lowest was in Baneshan and Mallika. Similarly, the total amino acid was lowest in Totapari and more in alphanso. Importantly there was less of the organic acid, protein, amino acids and more quantity of total phenols were recorded in the resistant varieties compared to susceptible. The insecticide efficacy study in 2015-17 indicated that the overall per cent reduction of the leafhoppers was more in tolfenpyrad 15EC (83.54-86.88 %). In bio-pesticides the least was in azadirachtin (63.43-68.72%) and B. bassiana (65.28-66.00%). Similarly, 2015-16, highest yield was recorded in tolfenpyrad 15EC (28.33-29.23 kg tree-1) and comparatively less quantity was recorded in Beauveria bassiana (13.76-16.1 kg tree-1) followed by Azadirachtin (13.5-15.58 kg tree-1). During 2015-17, the treatments like tolfenpyrad (18.46-19.26 kg tree-1) and flonicamid (17.76-18.33 kg tree-1) recorded higher yields over the untreated check. | |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810202172 | |
| dc.language.iso | English | |
| dc.pages | 128 | |
| dc.research.problem | STUDIES ON MANGO LEAFHOPPERS (HOMOPTERA: CICADELLIDAE) WITH SPECIAL REFERENCE TO SEASONAL ABUNDANCE, VARIETAL INFLUENCE AND MANAGEMENT IN NORTH-EASTERN TRANSITION ZONE OF KARNATAKA | |
| dc.sub | Agricultural Entomology | |
| dc.theme | STUDIES ON MANGO LEAFHOPPERS (HOMOPTERA: CICADELLIDAE) WITH SPECIAL REFERENCE TO SEASONAL ABUNDANCE, VARIETAL INFLUENCE AND MANAGEMENT IN NORTH-EASTERN TRANSITION ZONE OF KARNATAKA | |
| dc.these.type | Ph.D | |
| dc.title | STUDIES ON MANGO LEAFHOPPERS (HOMOPTERA: CICADELLIDAE) WITH SPECIAL REFERENCE TO SEASONAL ABUNDANCE, VARIETAL INFLUENCE AND MANAGEMENT IN NORTH-EASTERN TRANSITION ZONE OF KARNATAKA | |
| dc.type | Thesis |