Abstract
Sampling Malayan black bugs, Scotinophara coarctata (F.), in rice was conducted on the island of Palawan, the Philippines, using fluorescent-street-light traps, Petromax gas-lantern traps, and visual counts in the field. Peak catches in light traps occurred around the time of the full moon, especially during mid-August 1984, mid-April to mid-May, and June 1985. However, we found no relationship between densities of S. coarctata in light traps and in the field. Population sampling revealed that data from S. coarctata fit a negative binomial distribution, with a clumping coefficient of k = 0.50. A sequential sampling plan was developed and compared with intensive sampling using visual counts of bugs on individual hills of rice. Using sequential sampling, 44–56% fewer samples were needed to arrive at the same decision obtained by intensive sampling. Over 90% agreement between intensive sampling and sequential sampling was found.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
