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Bioecology of Harmonia eucharis Mulsant Coleoptera Coccinellidae An aphidophagous predator in western Himalayas



Bioecology of Harmonia eucharis Mulsant Coleoptera Coccinellidae An aphidophagous predator in western Himalayas



Entomon 20(3-4): 191-196



Harmonia eucharis when feeds on Brachycaudus helichrysi, Eriosoma lanigerum and Macrosiphoniella pseudoartemisiae lays 618 +- 62.58, 576.14 +- 65.45 and 549.71 +- 66.04 eggs respectively during its 44-51 days of oviposition period. Its total duration of preimaginal development at 23.8 +- 0.50 degree C are 21.43 +- 1.92, 24.86 +- 3.09 and 27.43 +- 1.84 days and at 17.9 +- 1.70 degree C are 34.29 +- 1.83, 38.14 +- 2.36 and 41.29 +- 2.60 days; larvae at 23.7 +- 0.30 degree C consume 668.86 +- 47.83, 646.14 +- 37.35 and 623.86 +- 40.59 and at 17.3 +- 1.60 degree C consume 800.14 +- 45.05, 760.14 +- 23.93 and 712.71 +- 22.19 the above mentioned prey species respectively. The calculated lower temperature limit for the entire development is 23.3 degree C and the sum of effective temperature is 339 days degree. H. eucharis has two generations in an year.

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