Economic Impact of Cotesia flavipes (Cameron) (Hymenoptera: Braconidae) for Controlling Sugarcane Moth Borers in Thailand
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Sugarcane moth borer pests in Thailand include the crambids Chilo infuscatellus Snellen, Chilo sacchariphagus (Bojer), Chilo tumidicostalis (Hampson) and Scirpophaga excerptalis (Walker) and the noctuid Sesamia inferens (Walker). The economic impact of the larval endoparasitoid, Cotesia flavipes (Cameron) (Hymenoptera: Braconidae) was studied through field experiments and benefit–cost analysis. Augmentative biological control research was conducted over two consecutive cropping seasons (2009–2011) to compare yields and net income of sugarcane between plots where C. flavipes was released every month (1250 adults/ha) and plots without releases. In treated plots, significantly (P < 0.05) higher yields were obtained: 84.38 ± 5.21 t/ha in the 2009/2010 and 86.47 ± 7.07 t/ha in the 2010/2011 cropping seasons, compared to control plots; 66.45 ± 7.62 t/ha in the 2009/2010 and 67.60 ± 4.79 t/ha in the 2010/1011 cropping seasons, respectively. Net income of the farmer from treated areas of USD 1637.78/ha in the 2009/2010 and USD 1340/ha in the 2010/2011 cropping seasons were significantly (P < 0.05) higher than those in the untreated areas: USD 532.37/ha in 2009/2010 and USD 322.61/ha in 2010/2011 cropping seasons.
KeywordsSugarcane moth borers Economic impact Cotesia flavipes Biological control
This research was funded by National Research Council of Thailand (NRCT). We thank our colleagues from National Biological Control research Center (NBCRC) who provided insights and expertise that greatly assisted our research. I would like to thank faculty of Natural Resources, Prince of Songkla University for providing all the possible facilities and necessary during this work.
This study was funded by National Research Council of Thailand (NRCT) (Grant Number 2554250501002).
Compliance with Ethical Standards
Conflict of interest
Associate professor Dr. Wiwat Suasa-ard has received research grants from the National Research Council of Thailand (NRCT). Dr. Tewee Maneerat has received a speaker honorarium from Thailand Society of Sugar Cane Technologists (TSSCT) presentation in XXIX ISSCT Congress 2016. Assistant Professor Dr. Sopon Uraichuen declares that he has no conflict of interest.
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