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Efficacy of Metarhizium anisopliae and Bacillus thuringiensis against tomato leafminer Tuta absoluta Meyrick (Lepidoptera: Gelechiidae)
| Content Provider | Semantic Scholar |
|---|---|
| Author | Mantzoukas, Spyridon Denaxa, Nikoleta-Kleio Lagogiannis, Ioannis |
| Copyright Year | 2019 |
| Abstract | Susceptibility of Tuta absoluta Meyrick (Lepidoptera : Gelechiidae) populations to Metarhizium anisopliae and Bacillus thuringiensis (Bt) were evaluated under laboratory conditions. T. absoluta larvae were treated either individually or in combination with a single dose rate of B. thuringiensis (0.5 μL / L) and three conidial suspensions viz. 1 x 104, 1 x 106 and 1 x 108 spores / mL of M. anisopliae. Larval mortality, pupation, adult emergence, mycosis and sporulation varied depending on the application of different quantities of M. anisopliae alone and in combination with B. thuringiensis. Maximum mortality (100%) was achieved in 2nd instar larvae when M. anisopliae (1 x 108 spores/mL) and B. thuringiensis (0.5μL / L) were applied synergistically, while 4th instar larvae recorded a 95.45% mortality. Compared with the untreated checks, mortality, pupation and adult emergence of both 2nd and 4th instar larvae were significantly reduced with the combined application of M. anisopliae (1 x 108 spores / mL) and B. thuringiensis (0.5μL / L). Μycosis was most prevalent on 2nd and 4th instar larvae, exceeding 88 and 80% respectively, after exposure to 1 × 104 conidia / mL. The results indicate that the entomopathogenic fungi and the insecticidal protein produced by B. thuringiensis can be used in combination as biocontrol agents for the management of T. absoluta. Current Agriculture Research Journal www.agriculturejournal.org ISSN: 2347-4688, Vol. 7, No.(1) 2019, pg. 37-45 CONTACT Spyridon Mantzoukas mantzoukas@upatras.gr Department of Agricultural Technology, Technological Institute of Western Greece, Amaliada, Greece. © 2018 The Author(s). Published by Enviro Research Publishers. This is an Open Access article licensed under a Creative Commons license: Attribution 4.0 International (CC-BY). Doi: http://dx.doi.org/10.12944/CARJ.7.1.05 Article History Received: 06 February 2019 Accepted: 15 April 2019 |
| Starting Page | 37 |
| Ending Page | 45 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| DOI | 10.12944/carj.7.1.05 |
| Alternate Webpage(s) | http://www.agriculturejournal.org/download/6677/ |
| Alternate Webpage(s) | https://doi.org/10.12944/carj.7.1.05 |
| Volume Number | 7 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
