Dose transfer of an oilbased formulation of Metarhizium anisopliae (Hypocreales: Clavicipitaceae) sprays to cotton bollworm in an arena trial
| dc.creator | Kpindou, O.D. | |
| dc.creator | Djegui, D.A. | |
| dc.creator | Glitho, I. A. | |
| dc.creator | Tamo, Manuele | |
| dc.date | 2011 | |
| dc.date | 2017-10-05T07:42:46Z | |
| dc.date | 2017-10-05T07:42:46Z | |
| dc.date.accessioned | 2026-06-27T15:53:03Z | |
| dc.description | A cotton field was used to set up an arena trial for investigating the dose transfer of oil-based ultra-low-volume sprays of Metarhizium anisopliae (Metchnikoff) Sorokin to the cotton bollworm Helicoverpa armigera (Hübner). Two doses of conidia (75 and 50 g/ha, being 3.75 × 1012 and 2.5 × 1012 conidia/ha, respectively) formulated in 2 litres (70:30, kerosene–peanut oil) were applied using a Berthoud ‘Micro Ulva’ to three groups of larvae of cotton bollworms positioned in three rows downwind of a single spray line. Both the distribution of the droplets and the effect of direct contact with spray droplets were quantified. The mean number of droplets decreased from 416 ( ± 60) droplets per cm2 (line 1; 0.4 m) to 45 ( ± 36) droplets per cm2 (line 3; 5 m). To achieve 50% mortality, >10 and >13 days were necessary for 75 and 50 g/ha, respectively. From day 15, the difference in mortality rates was significant between the two treatments. At line 3 (5 m), at 12 days after application, the mortality rate reached 52% for 75 g/ha and 47% for 50 g/ha. The results are discussed in view of optimizing the application of the biopesticides. | |
| dc.identifier | https://hdl.handle.net/10568/88176 | |
| dc.identifier.uri | http://hdl.handle.net/123456789/116336 | |
| dc.language | en | |
| dc.rights | Limited Access | |
| dc.source | Kpindou, O. D., Djegui, D. A., Glitho, I. A. & Tamo, M. (2011). Dose transfer of an oil-based formulation of Metarhizium anisopliae (Hypocreales: Clavicipitaceae) sprays to cotton bollworm in an arena trial. International Journal of Tropical Insect Science, 31(4), 262-268. | |
| dc.subject | helicoverpa armigera | |
| dc.subject | metarhizium anisopliae | |
| dc.subject | biopesticides | |
| dc.subject | ultralow volume spraying | |
| dc.title | Dose transfer of an oilbased formulation of Metarhizium anisopliae (Hypocreales: Clavicipitaceae) sprays to cotton bollworm in an arena trial | |
| dc.type | Journal Article |