Journal of Oil Palm Research Vol. 28  December 2016 p.  471-478
DOI: https://doi.org/10.21894/jopr.2016.2804.08

GROWTH AND LONGEVITY OF THE INSECT PREDATOR, Sycanus dichotomus STAL. (Hemiptera: Reduviidae) FED ON LIVE INSECT LARVAE

Author(s): SITI NURULHIDAYAH AHMAD* and NORMAN KAMARUDIN*

The suit­abil­ity of Tene­brio moli­tor Linn. (Coleoptera: Tene­bri­on­idae) and Cor­cyra cephalonica Stain­ton (Lep­i­doptera: Pyral­i­dae) lar­vae as food sources for the gen­eral insect preda­tor, Sycanus dichoto­mus Stal. (Hemiptera: Redu­vi­idae) was eval­u­ated by exam­in­ing the effects of dif­fer­ent prey con­sump­tion on the predator’s growth para­me­ters and longevity. The growth para­me­ters assessed in this study were devel­op­men­tal period, body weight and femur length. Com­pared to sin­gle prey species, a com­bi­na­tion of prey con­sist­ing of C. cephalonica and T. moli­tor lar­vae gen­er­ally increased the growth and devel­op­ment of nymphal and adult stages of S. dichoto­mus. Dif­fer­ent food sources showed dif­fer­ent degrees of suit­abil­ity: C. cephalonica sig­nif­i­cantly (P<0.01) shortened the developmental period of nymphal and adult stages compared to T. molitor larvae and combination of both larvae by 17.5% and 6.9%, respectively. Moreover, C. cephalonica larvae alone represent a more suitable food source for 1st and 2nd nymph instars development, compared to late nymphs and adults. However, the combination of both larvae had the shortest nymph’s developmental period (95 days), higher body weight and longer femur length, plus improved the adults’ longevity (69 days). The ratio of male adults was higher in the treatment which fed on T. molitor larvae and combination of both larvae, in contrast to the C. cephalonica larvae treatment. It is suggested that future works should examine the nutritional quality of the prey species to support these findings.

Keywords: , , , , ,

Author Information
* Malaysian Palm Oil Board, 6 Persiaran Institusi, Bandar Baru Bangi, 43000 Kajang, Selangor, Malaysia.


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