Abstract
AbstractApplication of powder diets may promote development of the predator Geocoris ochropterus (Fieber) when densities are low in greenhouses or fields. Development and nymphal survival ratio of G. ochropterus fed on different powder diets including silkworm pupae (A), crickets (B), silkworm pupae and sunflower seed (C) and crickets and sunflower seed (D) were examined. Total average development period was 30.14 days for instars fed on silkworm pupae, 34.43 days for instars fed on crickets, 26.28 days for instars fed on silkworm pupae and sunflower seed and 29.67 days for instars fed on crickets and sunflower seed, and they were significantly different. Head width, body length, forewing length, dry body weight of adults and sex ratio were not affected by the different diets. There were significantly different found in survival rates among the diets when the nymph reached 5th instar. Results indicate that the combination powder of silkworm pupae and sunflower seed will promise as an alternative diet in the greenhouses to maintain the population of G. ochropterus.
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