Hem Saxena ¹, R. Ahmad ¹

Affiliations
1 Division of Crop Protection, Indian Institute of Pulses Research, Kanpur 208 024, Uttar Pradesh, IN

Abstract

In a laboratory trial Dipel (B. t.) at 0.5, 0.75, 1.0 and 2 kg/ha was found more toxic than Delfin, killing 16,36, 76 and 88 per cent larvae of Autographa nigrisigna Walker. Delfin registered 8, 28, 60 and 80 per cent mortality in dosage 0.5,0.75, 1.0 and 2.0 kg/ha, respectively. Dipel 2 kg/ha was on par with endosulfan (0.07%) after 72 h.

Keywords

Autographa nigrisigna, Bacillus thuringiensis.

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Hem Saxena ¹, R. Ahmad ¹

Affiliations
1 Indian Institute of Pulses Research, Kanpur 208 024, Uttar Pradesh, IN

Abstract

Beauveria bassiana (Balsamo) Vuillemin was tested under field conditions to control Helicoverpa annigera (Hiibner) infesting chickpea for two crop seasons and was found very effective. The concentration of fungal spores in spray fluid had definite negative correlation with the pest incidence. At a concentration of 2.68 × 10⁷ spores/ml, the average pod damage was 6.8 per cent and yield of 2377 kg/ha. Untreated control recorded 16.3 per cent pod damage with an yield level of 1844 kg/ha.

Keywords

Beauveria bassiana, Chickpea, Helicoverpa armigera.

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