Malays. Appl. Biol. (2017) 46(3): 161–169
DIVERSITY AND GUILD STRUCTURE OF INSECTS DURING
RICE FLOWERING STAGE AT A SELECTED RICE FIELD
IN PENANG, MALAYSIA
NUR AIDA HASHIM1*, MASNIZA ABD AZIZ2, NORASMAH BASARI2, KHADIJAH SAAD1,
AIMAN HANIS JASMI3 and SUHAILA AB HAMID4
1School of Food Science and Technology,Universiti Malaysia Terengganu,
21030 Kuala Nerus, Terengganu, Malaysia
2School of Marine and Environmental Sciences, Universiti Malaysia Terengganu,
21030 Kuala Nerus, Malaysia
3Dow AgroSciences (Malaysia) Sdn. Bhd., 46350 Petaling Jaya, Selangor, Malaysia
4School of Biological Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia
*Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it
Accepted 6 September 2017, Published online 4 October 2017
ABSTRACT
A study on diversity of insects in rice field was conducted at Kg Terus, Guar Perahu in Penang. This study aims to determine the diurnality and guild structure of insect in rice field specifically during the flowering stage of rice. Insects were collected using sweep net method and light trap method. Overall, a total of 1936 insect specimens representing 28 species, 19 families and seven orders were collected. Twenty five species from 19 families were caught during day time while 17 species from 13 families were trapped at night. Coleopterans were the dominant insect captured during day time sampling with Micraspis crocea from family Coccinellidae captured in highest number (223). In contrast, Hemipterans was dominant during night time with Nilaparvata lugens from family Delphacidae found in highest number (258). The Odonata recorded the highest diversity index (H’= 1.2587) while Coleoptera recorded the highest richness index (Imargalef = 5.8390) values for diurnal insect. For nocturnal insect, Hemiptera recorded the highest values for both diversity index (H’= 1.2655) and richness index (Imargalef = 5.8390). In term of guild structure, the rice pest was the most dominant insect found in rice field for both diurnal and nocturnal group. This followed by predator, others (visitor/pollinator) and parasitoid groups. Result of this study will identify the classification of insect present during the flowering stage of rice allowing farmers to forecast pest population build up to assist in the pesticides selection that will be generally applied at the end of flowering stage. This consequently will help to conserve beneficial insects and lower the pest management cost.
Key words: Biodiversity, insect, pest, rice field, paddy, guild structure
