Table 2 Number of Spodoptera exigua larvae (/50 plants) post treatments with Beauveria bassiana in sugar beet field in season 2016/2017
Dates of inspections | Numbers of larvae/50 plants | Reduction** (%) | Dates of inspections | Numbers of larvae | Reduction** (%) | ||
|---|---|---|---|---|---|---|---|
Treat. | Cont. | Treat. | Cont. | ||||
18 November 2016* | 9 | 9 | 26 March 2017* | 5 | 8 | ||
3 December 2016 | 5 | 11 | 54.5 | 4 April 2017* | 3 | 9 | 66.6 |
18 January 2017 | 2 | 5 | 11 April 2017* | 3 | 10 | 70 | |
27 January 2017 | 1 | 4 | 18 April 2017* | 3 | 8 | 62.5 | |
20 February 2017 | 2 | 3 | 25 April 2017 | 1 | 2 | 50 | |
3 March 2017 | 4 | 6 | 2 May 2017 | 0 | 0 | ||