Biointensive Management of Okra Fruit Borers using Braconid Parasitoids (Braconidae: Hymenoptera)
Okra (<em>Abelmoschus esculentus</em> (L.) Moench) is ravaged by many insect pests from germination to harvest. Sucking pests in the early stage and the fruit borers, <em>Earias vittella</em> Fabricius and <em>Helicoverpa armigera</em> (Hübner) in the later stage...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Postgraduate Institute of Agriculture, University of Peradeniya
2010-12-01
|
| Series: | Tropical Agricultural Research |
| Subjects: | |
| Online Access: | https://tar.sljol.info/articles/2585 |
| _version_ | 1818218116339990528 |
|---|---|
| author | G Thanavendan S Jeyarani |
| author_facet | G Thanavendan S Jeyarani |
| author_sort | G Thanavendan |
| collection | DOAJ |
| description | Okra (<em>Abelmoschus esculentus</em> (L.) Moench) is ravaged by many insect pests from germination to harvest. Sucking pests in the early stage and the fruit borers, <em>Earias vittella</em> Fabricius and <em>Helicoverpa armigera</em> (Hübner) in the later stage causes extensive damage to fruits causing 69 per cent yield loss. In recent years, increased interest has been shown towards biological control following unsatisfactory results with the application of conventional insecticides. Horticultural crops, chiefly fruit crops, provide a stable environment offering good opportunity for biological control. Hence, investigations were carried out during 2007-2008 to assess the potential of braconid parasitoids against okra fruit borers. The results revealed that the combination of <em>Trichogramma chilonis</em> + <em>Chelonus blackburni</em> + <em>Bracon brevicornis</em> and <em>C. blackburni</em> + <em>B. brevicornis</em> were more effective to lower larval population of <em>E. vittella</em> and <em>H. armigera</em> which was next to Endosulfan 35 EC after three releases/spray. Similar trend was also observed for per cent fruit damage on both number and weight basis. Combination of <em>T. chilonis</em> + <em>C. blackburni</em> + <em>B. brevicornis</em> and <em>C. blackburni</em> + <em>B. brevicornis</em> recorded higher yield which was on par with endosulfan 35 EC. The results of the trials widened the scope of utilizing the braconid parasitoids in the biosuppression of fruit borers on okra. <br /><p>DOI: <a href="http://dx.doi.org/10.4038/tar.v21i1.2585">http://dx.doi.org/10.4038/tar.v21i1.2585</a></p><em>Tropical Agricultural Research</em> Vol. 21(1): 39-50 (2009) |
| first_indexed | 2024-12-12T07:18:39Z |
| format | Article |
| id | doaj.art-af8a70cceb6543efa99b7baee2bc922c |
| institution | Directory Open Access Journal |
| issn | 1016-1422 |
| language | English |
| last_indexed | 2024-12-12T07:18:39Z |
| publishDate | 2010-12-01 |
| publisher | Postgraduate Institute of Agriculture, University of Peradeniya |
| record_format | Article |
| series | Tropical Agricultural Research |
| spelling | doaj.art-af8a70cceb6543efa99b7baee2bc922c2022-12-22T00:33:26ZengPostgraduate Institute of Agriculture, University of PeradeniyaTropical Agricultural Research1016-14222010-12-01211395010.4038/tar.v21i1.25852184Biointensive Management of Okra Fruit Borers using Braconid Parasitoids (Braconidae: Hymenoptera)G Thanavendan0S Jeyarani1Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore, Tamil NaduDepartment of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore, Tamil NaduOkra (<em>Abelmoschus esculentus</em> (L.) Moench) is ravaged by many insect pests from germination to harvest. Sucking pests in the early stage and the fruit borers, <em>Earias vittella</em> Fabricius and <em>Helicoverpa armigera</em> (Hübner) in the later stage causes extensive damage to fruits causing 69 per cent yield loss. In recent years, increased interest has been shown towards biological control following unsatisfactory results with the application of conventional insecticides. Horticultural crops, chiefly fruit crops, provide a stable environment offering good opportunity for biological control. Hence, investigations were carried out during 2007-2008 to assess the potential of braconid parasitoids against okra fruit borers. The results revealed that the combination of <em>Trichogramma chilonis</em> + <em>Chelonus blackburni</em> + <em>Bracon brevicornis</em> and <em>C. blackburni</em> + <em>B. brevicornis</em> were more effective to lower larval population of <em>E. vittella</em> and <em>H. armigera</em> which was next to Endosulfan 35 EC after three releases/spray. Similar trend was also observed for per cent fruit damage on both number and weight basis. Combination of <em>T. chilonis</em> + <em>C. blackburni</em> + <em>B. brevicornis</em> and <em>C. blackburni</em> + <em>B. brevicornis</em> recorded higher yield which was on par with endosulfan 35 EC. The results of the trials widened the scope of utilizing the braconid parasitoids in the biosuppression of fruit borers on okra. <br /><p>DOI: <a href="http://dx.doi.org/10.4038/tar.v21i1.2585">http://dx.doi.org/10.4038/tar.v21i1.2585</a></p><em>Tropical Agricultural Research</em> Vol. 21(1): 39-50 (2009)https://tar.sljol.info/articles/2585okra fruit borers |
| spellingShingle | G Thanavendan S Jeyarani Biointensive Management of Okra Fruit Borers using Braconid Parasitoids (Braconidae: Hymenoptera) Tropical Agricultural Research okra fruit borers |
| title | Biointensive Management of Okra Fruit Borers using Braconid Parasitoids (Braconidae: Hymenoptera) |
| title_full | Biointensive Management of Okra Fruit Borers using Braconid Parasitoids (Braconidae: Hymenoptera) |
| title_fullStr | Biointensive Management of Okra Fruit Borers using Braconid Parasitoids (Braconidae: Hymenoptera) |
| title_full_unstemmed | Biointensive Management of Okra Fruit Borers using Braconid Parasitoids (Braconidae: Hymenoptera) |
| title_short | Biointensive Management of Okra Fruit Borers using Braconid Parasitoids (Braconidae: Hymenoptera) |
| title_sort | biointensive management of okra fruit borers using braconid parasitoids braconidae hymenoptera |
| topic | okra fruit borers |
| url | https://tar.sljol.info/articles/2585 |
| work_keys_str_mv | AT gthanavendan biointensivemanagementofokrafruitborersusingbraconidparasitoidsbraconidaehymenoptera AT sjeyarani biointensivemanagementofokrafruitborersusingbraconidparasitoidsbraconidaehymenoptera |