Abstract
Sampling statistics of eggs, nymphs, and adults of Perkinsiella saccharicida Kirkaldy and its predators, Tytthus spp., were determined on six varieties of sugarcane ( Saccharum spp.) in southern Queensland, Australia. Iwao’s patchiness regression and Taylor’s power law were used to model the relationship between mean and variance of counts. Taylor’s power law gave better fits to all data except for counts of eggs per egg mass. Sample sizes for fixed levels of precision and fixed-precision-level stop lines for sequential sampling were developed for all stages of P. saccharicida and nymphs and adults of Tytthus spp. The In(x + 1) transformation standardized the mean-variance relationship for P. saccharicida nymphs, adults, and eggs per egg mass and Tytthus spp. adults, but not for P. saccharlctda egg masses or Tytthus spp. nymphs. The Healy and Taylor transformation was not effective on P. saccharicida data but standardized Tytthus spp. nymph and adult counts.
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.
