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Table 2 Number of Spodoptera exigua larvae (/50 plants) post treatments with Beauveria bassiana in sugar beet field in season 2016/2017

From: Effect of the fungus, Beauveria bassiana (Balsamo) Vuillemin, on the beet armyworm, Spodoptera exigua (Hübner) larvae (Lepidoptera: Noctuidae), under laboratory and open field conditions

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  
  1. *Applications with Beauveria bassiana (6 × 107 spores/ml)
  2. **Reduction (%) by the only count after application