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Table 3 Number of Spodoptera exigua larvae (/50 leaves) post treatments with Beauveria bassiana in sugar beet field in season 2017/2018

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 Reduction** (%) Dates of inspections Numbers of larvae Reduction** (%)
Treat. Cont. Treat. Cont.
8 November 2017* 4 4   26 March 2018* 3 4  
3 December 2017 2 6 66.6 4 April 2018* 1 4 75
18 January 2018 0 3   11 April 2018* 2 4 50
27 January 2018 1 3   18 April 2018* 1 5 80
20 February 2018 3 4   25 April 2018 1 4 75
3 March 2018 3 4   2 May 2018 1 2  
  1. *Applications with Beauveria bassiana (6 × 107 spores/ml)
  2. **Reduction (%) by the only count after application