STUDIES ON COMPARATIVE DEVELOPMENT AND MANAGEMENT OF RICE WEEVIL (Sitophilus oryzae L.) ON DIFFERENT CEREALS
| dc.contributor.advisor | GIRI, GOURI SHANKAR | |
| dc.contributor.author | MAJI, SOURAV | |
| dc.date.accessioned | 2022-12-31T06:06:23Z | |
| dc.date.available | 2022-12-31T06:06:23Z | |
| dc.date.issued | 2022 | |
| dc.description.abstract | The present investigation entitled “Studies on comparative development and management of rice weevil (Sitophilus oryzae L.) on different cereals” was carried out at Department of Entomology, Tirhut College of Agriculture, Dholi, Bihar during 2021-22. The study focused on host preference and damage potential of rice weevil, correlation between population build up and biochemical parameters of different cereals and evaluation of the bio-efficacy of some entomopathogenic fungi against rice weevil on different cereals. Among different cereals, wheat was found as the most preferred host with 14.38 ± 0.48 numbers of weevils after 25 days of release and F1 progeny of 329.13 ± 6.75 numbers. Maximum and minimum kernel damage (%), weight loss (%) and consumed grain weight was recorded on wheat and ragi, respectively. A negative and highly significant relation (r = -0.925**) between phenol content and number of F1 progeny produced was observed. The LC50 value of Beauveria bassiana after 72 hours of treatment varied from 1.778 g/kg of seeds (on ragi) to 2.011 g/kg of seeds (on maize), whereas, that of Metarhizium anisopliae was varied from 1.870 g/kg of seeds (on ragi) to 2.196 g/kg of seeds (on wheat). Significant interaction was found between tested cereal grains and entomopathogenic fungi, also between days after treatment and entomopathogenic fungi. It was observed that Metarhizium anisolpliae in combination with diatomaceous earth and alone was found most effective on rice, maize and barley as compared to Beauveria bassiana in combination with diatomaceous earth and alone, respectively, whereas, opposite case was observed on wheat, oat and ragi. Complete mortality of weevils (100 %) was observed on 15 days after treatment when seeds were treated with either Beaveria bassiana or Metarhizium anisopliae in combination with diatomaceous earth in all cereal except on ragi where it was observed on 7 days after treatment when grains were treated with Metarhizium anisopliae in combination with diatomaceous earth.It was observed that, after 50 days of treatment there was no significant effect on germination percentage of different cereals when seeds were treated with Beauveria bassiana, Metarhizium anisopliae alone or in combination with diatomaceous earth (DE). | en_US |
| dc.identifier.other | M/ENTO/074/2020-21 | |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810190899 | |
| dc.keywords | Comparative development and management, Rice weevil, Sitophilus oryzae L., Different cereals, Entomology. | en_US |
| dc.language.iso | English | en_US |
| dc.pages | 98 p. + i-xii (Bibliography) | en_US |
| dc.publisher | DRPCAU, PUSA | en_US |
| dc.sub | Entomology | en_US |
| dc.theme | STUDIES ON COMPARATIVE DEVELOPMENT AND MANAGEMENT OF RICE WEEVIL (Sitophilus oryzae L.) ON DIFFERENT CEREALS | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | STUDIES ON COMPARATIVE DEVELOPMENT AND MANAGEMENT OF RICE WEEVIL (Sitophilus oryzae L.) ON DIFFERENT CEREALS | en_US |
| dc.type | Thesis | en_US |