Stage specific feeding attributes and mobilization of nutrients in Mexican beetle,Zygogramma bicolorata Pallister on Parthenium hysterophorus L. |
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| Affiliation: | 1. Entomology Laboratory, Department of Zoology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata 700 019, India;2. Cell and Molecular Therapeutics Laboratory, Department of Biochemistry and Biotechnology, Oriental Institute of Science and Technology, Vidyasagar University, Midnapore 721102, West Bengal, India;1. School of Karst Science, Guizhou Normal University/ State Engineering Technology Institute for Karst Desertification Control, Guiyang, Guizhou 550001, China;2. Guizhou Provincial Key Laboratory for Rare Animal and Economic Insect of the Mountainous Region, Guiyang University, Guiyang, Guizhou 550005, China;1. Institute of Plant Protection, Guizhou Academy of Agricultural Sciences, Guiyang 550006, China;2. Southern Insect Management Research Unit, Agricultural Research Service, United States Department of Agriculture, Stoneville, MS 38776, USA;3. Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China;1. Department of Biological Sciences, University of Memphis, 3700 Walker Avenue, Memphis, TN 38152, USA;2. Center for Biodiversity Research, University of Memphis, 3700 Walker Avenue, Memphis, TN 38152, USA;3. Plant Quarantine Technology Center, APQA, MAFRA, 167, Yongjeon-ro Gimcheon-si Gyeongsanbuk-do 39660 Republic of Korea;4. Senckenberg Deutsches Entomologisches Institut, Eberswalder Straße 90, 15374 Müncheberg, Germany;5. Insect Biosystematics Laboratory, Seoul National University, Seoul 151-921, Republic of Korea;6. Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea;7. Research Institute for Agricultural and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea |
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| Abstract: | Parthenium hysterophorus L. (Asteraceae) is a toxic weed of agricultural farms, pastures and wastelands with a pan-tropical distribution. The weed causes a reduction in crop production of agricultural fields and severe health problems in humans. The Mexican beetle, Zygogramma bicolorata Pallister (Coleoptera: Chrysomelidae) is among the most promising candidates for the weed biocontrol. However, no previous study has evaluated assimilation of nutrients in this beetle. In the present study, feeding attributes and assimilation of nutrients by larvae of Z. bicolorata were assessed on the weed. Results revealed that the first larval instars of Z. bicolorata exhibited lowest consumption rates, and accumulated minimum concentrations of glucose, proteins and triglycerides in their body. They showed compensatory feeding, and displayed highest food utilization efficiencies and developmental rates. In contrast, the fourth larval instars exhibited higher food consumption rates and conversion efficiencies, but displayed lowest developmental rates. Accumulation of food reserves was also recorded maximum for the fourth larval instars. Overall, the findings may aid current mass-rearing efforts for Z. bicolorata in laboratories, but field trials are still needed to strengthen the present findings. |
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| Keywords: | Weed control Consumption rate Conversion efficiency Growth rate |
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