Evaluation of some biopesticides and their additives applied in maize fields on Sesamia cretica (led.) [electronic resource].

Includes references.

Field treatments 2003 & 2004 early summer season, the 9 assayed treatments bacterial biopesticides alone and mixed with additives (molasses 10% and K₂CO₃ 1%) were evaluated against Sesamia cretica (Led.) in maize fields. Dipel at lower concentration [I] + molasses 10%, Dipel at higher concentration [II] and Dipel [I] + K₂CO₃, could be, fairly, considered the best treatments. Those led to more than 80% reduction in egg-masses, mostly more than 70% reduction in S. cretica larval counts, more than 75% reduction in the dead heart-cases, increasing the resultant dry ears yield (17.1, 16.0 and 14.8 ardab / feddan), reflects 95.9, 83.7 and 69.4% increase in corn yield than control, respectively. In addition, these treatments manifested latent effect when caused severest reduction in pupal weight ranged 30.9 to 43.56% than control. Also, evaluation of these treatments proved as more safe of predaceous insects when achieved higher numbers of predaceous insects were recorded after using D [I] + molasses and D [I] + K₂CO₃ in early summer maize season. Accordingly these treatments have to be considered as main component of the integrated pest management items of the pink stem borer S. cretica Led.

Summary in Arabic.

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