| Popis: |
Efficacy of some resistance inducers for reduction of Agrotis segetum (Lepidoptera: Noctuidae) in sugar beet was evaluated under field conditions. The inducers include salicylic acid, calcium silicate and sodium silicate which applied in two dosages, 100 and 50 per cent of recommended field dosages (RFD). The larval density in calcium silicate treatment was significantly lower than control (H”19.5%). However, other inducers, salicylic acid and sodium silicate, did not significantly affect the larval density. Reduction of the application dosage to 50 per cent RFD did not have significant effect on the inducer efficacy. |
