Zobrazeno 1 - 10
of 24
pro vyhledávání: '"F. G. Peet"'
Autor:
R. S. Hunt, F. G. Peet
Publikováno v:
Plant disease. 81(9)
The spread rate of tomentosus root disease, caused by Inonotus tomentosus, was investigated by a new technique employing temporal differences in the initiation of the reduced annual radial increment between pairs of diseased trees. Pairs of infected
Publikováno v:
The Canadian Entomologist. 130:337-347
Feeding on leaders of resistant Sitka spruce trees, Picea sitchensis (Bong.) Carr., Led to ovarian regression in white pine weevils, Pissodes strobi Peck., that contained already mature eggs at the time of caging on leaders. Such feeding also led to
Publikováno v:
The Canadian Entomologist. 130:305-314
The number and volume of feeding and oviposition holes made by female white pine weevils, Pissodes strobi (Peck), on lateral branches of resistant and susceptible Sitka spruce, Picea sitchensis (Bong.) Carr., were determined. When all possible effect
Publikováno v:
Canadian Journal of Forest Research. 27:2104-2108
An evaluation of a hand-held electronic laser-based surveying instrument was carried out for stem mapping of trees in forest plantations. Results obtained from field tests of the hand-held device and a standard surveyoris total station are compared.
Publikováno v:
Canadian Journal of Forest Research. 26:148-151
The rate of spread of Armillariaostoyae (Romagnesi) Herink was calculated from observations over 20 years on plots in two Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) plantations in the southern interior of British Columbia. Average rates of spr
Publikováno v:
Forest Pathology. 24:287-299
The survival of two Canadian isolates of the pinewood nematode, Bursaphelenchus xylophilus, in coniferous wood chips under different temperatures, relative humidities and time intervals was investigated in vitro. The nature of the survival mechanism
Publikováno v:
Environmental Entomology. 29:1097-1099
Associations between the density and distribution of cortical resin canals of host trees and their resistance against insects have been the subject of many studies (Stroh and Gerhold 1965; Wilkinson 1983; Tomlin and Borden 1994a, 1994b). None, howeve
Autor:
T. S. Sahota, F. G. Peet
Publikováno v:
Proceedings of IEEE Pacific Rim Conference on Communications Computers and Signal Processing.
It is shown that chromatin (DNA) distribution patterns in the nuclei of insect cells provide predictors related to the future development of the insect population. The patterns are extracted from digital images of the nuclei. The systems described ha
Publikováno v:
Proceedings of Canadian Conference on Electrical and Computer Engineering.
This research focuses on developing a user friendly visualization system which reconstructs three-dimensional objects from serial microscope images. This visualization system consists of three parts, serial microscope image acquisition, object modeli
Publikováno v:
IEEE Pacific Rim Conference on Communications, Computers, and Signal Processing. Proceedings.
The defocused point spread functions and optical transfer functions of a microscope were measured and analyzed. The main purpose of the analysis was to verify the accuracy of analytical approximations of these functions, which were presented but not