Growth and longevity of the insect predator Sycanus dichotomus stal. (Hemiptera: Reduviidae) fed on live insect larvae

Siti Nurulhidayah Ahmad, . and Norman Kamarudin, . Growth and longevity of the insect predator Sycanus dichotomus stal. (Hemiptera: Reduviidae) fed on live insect larvae. pp. 471-478. ISSN 1511-2780

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 predators 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 (P0.01) 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 nymphs 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.

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Abstract

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 predators 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 (P0.01) 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 nymphs 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.

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Item Type:	Article
AGROVOC Term:	Reduviidae
AGROVOC Term:	Hemiptera
AGROVOC Term:	Insects
AGROVOC Term:	Arthropods
AGROVOC Term:	Biological control
AGROVOC Term:	Biological control agents
AGROVOC Term:	Biological development
AGROVOC Term:	Corcyra cephalonica
AGROVOC Term:	Tenebrio molitor
AGROVOC Term:	Body weight
Geographical Term:	Malaysia
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	28 Apr 2025 07:19
URI:	http://webagris.upm.edu.my/id/eprint/24272

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