Biodiversity assessment of ichneumonoid parasitoids (Hymenoptera:ichneumonoidea) in rice ecosystem
2009
Nur Azura, A. | Tan Shilan, M.S., Universiti Putra Malaysia, 43400 Serdang, Selangor (Malaysia). Dept. of Plant Protection
The diversity of Ichneumonoid parasitoids (Hymenoptera:Ichneumonidea) was studied to identify the Ichneumonoid parasitoids associated with the rice ecosystem. Five malaise traps were set up in the rice field situated at Bandar Baharu (northern part of Peninsular Malaysia) Kedah, Malaysia. The specimens were collected weekly for 3 consecutive weeks. A total number of 16 subfamilies were obtained from the sampling comprising of 159 individuals. The number of individuals obtained from each subfamilies was significantly different (p0.001). The highest individuals abundance sampled were from the subfamily Microgastinae (38), followed by subfamily Crypfinae (36) and Cardiochilinae (18) and Pimplinae (15). Only a single individual was obtained from the subfamilies of Cremastinae, Ichneumoninae, Mesochorinae and Rogadinae. The Shannon-Weiver Species Diversity Index (H') of Ichneumonoids in the second (63 to 73 days of age) and the third sampling period (63 to 72 days of age), with the value of 2.7 and 2.51, respectively, were significantly higher than the first sampling period (56 to 63-days of age) which was only 2.07. This results were supported with the total number of subfamilies and individuals obtained from second and third sampling which were 12 subfamilies, 68 individuals, and 14 subfamilies, 75 individuals, respectively, as to compare with only 7 subfamilies and 16 individuals in the first sampling. The most abundant species captured were Amauromorpha accepta metathoracica Ashmead (Ichneumonidae:Cryptinae) Cardiochiles sp. (Braconidae:Cardiochilinae) and Macrocentrus sp. (Braiconidae:Macrocentrinae).
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