Zobrazeno 1 - 10
of 35
pro vyhledávání: '"M. K. Mukerji"'
Publikováno v:
Canadian Journal of Agricultural Economics/Revue canadienne d'agroeconomie. 29:303-316
Autor:
M. K. Mukerji, Stuart H. Gage
Publikováno v:
Environmental Entomology. 6:469-479
Thirty-two years of annual adult grasshopper survey data collected in Saskatchewan were quantified and used to examine the trends in grasshopper numbers and selected weather variables. Interrelationships between 4 species of grasshoppers, Melanoplus
Publikováno v:
The Canadian Entomologist. 108:255-270
Studies were carried out to investigate the growth response of normal and defoliated spring wheat. Plant growth is expressed by the von Bertalanffy (1957) growth equation modified to allow for declining growth potential with age. Grasshopper damage w
Publikováno v:
The Canadian Entomologist. 107:785-792
This paper presents a sampling plan for estimating numbers of H. postica larvae in the spring growth of alfalfa. A 6-stem bouquet of foliage formed an appropriate sample unit. The pattern of counts for all four instars conformed to the negative binom
Autor:
C. G. Bailey, M. K. Mukerji
Publikováno v:
The Canadian Entomologist. 108:1207-1212
The feeding habits of Melanoplus bivittatus (Say) and M. femurrubrum (DeGeer) in an Ontario grassland were investigated by analyzing crop contents. The study revealed that both species are mixed feeders which prefer forbs over grasses. Both species i
Publikováno v:
Journal of Economic Entomology. 80:268-271
Accuracy of extracting wheat midge, Sitodiplosis mosellana (Gehin), cocoons and larvae from soil samples averaged 99 and 94% for a sieving method and a brine flotation method, respectively. The time required to process bulk soil samples containing wh
Publikováno v:
The Canadian Entomologist. 109:229-236
The study examined quantitatively the effects of embryonic development in the preceding fall and cumulative heat units from 1 April to 31 July in the current year on density trends of three major grasshopper species (Melanoplus sanguinipes (Fabr.), M
Autor:
M. K. Mukerji, C. G. Bailey
Publikováno v:
The Canadian Entomologist. 109:605-614
Bioenergetic studies on populations of the two-striped grasshopper, Melanoplus bivittatus (Say), and the red-legged grasshopper, M. femurrubrum (De Geer), at a natural grassland site in Ottawa in 1971 and 1972 indicated that the former species ingest
Autor:
M. K. Mukerji, O. O. Olfert
Publikováno v:
The Canadian Entomologist. 115:629-636
Studies showed that the type of damage, the timing of damage with the phenological stage of the crop, and the amount of available soil moisture influenced the growth response of spring wheat to acute levels of grasshopper damage and acute levels of a
Autor:
R. L. Randell, M. K. Mukerji
Publikováno v:
The Canadian Entomologist. 106:801-812
The earliness or lateness of the hatching period in Melanoplus sanguinipes (Fabr.) affects the type and amount of damage to the crop and the timing of control measures. An empirical model for prediction of hatching at each decile of egg populations w