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Articles 1 - 6 of 6
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Verbenone Bubble Caps Ineffective As A Preventive Strategy Against Mountain Pine Beetle Attacks In Ponderosa Pine, C. K. Lister, J. M. Schmid, S. A. Mata, D. Haneman, C. O'Neil, J. E. Pasek, L. Sower
Verbenone Bubble Caps Ineffective As A Preventive Strategy Against Mountain Pine Beetle Attacks In Ponderosa Pine, C. K. Lister, J. M. Schmid, S. A. Mata, D. Haneman, C. O'Neil, J. E. Pasek, L. Sower
Judith E Pasek
Verbenone capsules were stapled to trees in mountain pine beetle-infested stands of ponderosa pine at densities of 10, 20, 40, and 68 capsules per acre. Mean numbers of infested trees were not significantly different among treatments. Either the verbenone is not effective in repelling attacks or the formulation in the capsules needs to be modified to enhance its effectiveness. Verbenone capsules were not effective enough to be used in a preventive strategy.
Preparing For Africanized Honey Bees: Evaluating Control In Mating Apiaries, Richard L. Hellmich Ii, Gordon D. Waller
Preparing For Africanized Honey Bees: Evaluating Control In Mating Apiaries, Richard L. Hellmich Ii, Gordon D. Waller
Richard L Hellmich
A measure of queen mating control at an apiary is the number of matings with managed drones expressed as a percentage of total matings (managed and feral drones). In Texas, USA, using cordovan queens and drones for tests in July, it was found that at a commercial apiary near other apiaries 93% of all matings were with managed drones. At an isolated (outlying) apiary, the figure was 83%. It is estimated that in April-May, when most queens are produced in this area, mating control would be 96-98% and 93-96% respectively. It is concluded that 90-95% is a realistic level for …
Flight Characteristics Of Foraging Africanized And European Honey Bees (Hymenoptera: Apidae), Robert G. Danka, Richard L. Hellmich Ii, Anita M. Collins, Thomas E. Rinderer, Vernon L. Wright
Flight Characteristics Of Foraging Africanized And European Honey Bees (Hymenoptera: Apidae), Robert G. Danka, Richard L. Hellmich Ii, Anita M. Collins, Thomas E. Rinderer, Vernon L. Wright
Richard L Hellmich
Interfloral movement and visitation parameters were quantified for individual Africanized and European honey bees (Apis mellifera) foraging in a field of sesame in Venezuela. The 2 bee types showed nearly identical movement and visitation characteristics for most of the parameters measured. Africanized bees spent slightly less time per flower visit (mean ± SD; 10±4 s vs. 12±6 s) and tended to travel at a slightly faster rate (210±150 cm/min vs. 180±120 cm/min.) The frequencies of visits for various resources differed; Africanized bees collected only pollen on 51% of visits and only nectar on 22% of visits, whereas for European bees, …
Biochemical And Immunochemical Comparison Of Africanized And European Honeybee Venoms, D. R. Nelson, Anita M. Collins, Richard L. Hellmich, R. T. Jones, R. M. Helm, D. L. Squillace, J. W. Yunginger
Biochemical And Immunochemical Comparison Of Africanized And European Honeybee Venoms, D. R. Nelson, Anita M. Collins, Richard L. Hellmich, R. T. Jones, R. M. Helm, D. L. Squillace, J. W. Yunginger
Richard L Hellmich
Africanized honeybees (HBs) pose a hazard to both normal and sting-sensitive subjects in certain areas of Central and South America, and it is predicted that they will soon be present in the southern United States as well. Using an electrical stimulation device, we collected Africanized HB venom (AHV) in Venezuela and European HB venom (EHV) in Louisiana. These venoms, along with commercial European HB venom (CHV), were compared by thin-layer isoelectric focusing and sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). The Coomassie brilliant blue and silver-stained banding patterns of AHV and EHV were essentially identical to CHV. Western blots were prepared …
Douglas-Fir Beetle Infestation Following The Clover Mist Fire On The Clarks Fork Ranger District, Shoshone National Forest, Wyoming, Judith Pasek
Judith E Pasek
In 1989, Douglas-fir beetle (DFB), Dendroctonus pseudotsugae Hopkins, was detected on the Clarks Fork Ranger District in large-diameter Douglas-fir, Pseudotsuga menziesii (Mirb.) Franco, trees blackened by the 1988 Clover Mist Fire. At Cathedral Cliffs and Squaw Creek, respectively, 22% and 32% of charred Douglas-firs greater than 10 in. DBH were infested; approximately 9 and 16 Douglas-fir trees per acre were infested, respectively. Although half the bark samples (6 in. by 6 in.) from infested trees contained no DFB brood, average brood production was high -- 9 and 7 callow adults per sample, respectively, at Cathedral Cliffs and Squaw Creek. Approximately …
Genetics Of Interspecific Hybridization In The Triseriatus And Zoosophus Groups Of The Aedes (Protomacleaya) (Diptera: Culicidae)., David B. Taylor
Genetics Of Interspecific Hybridization In The Triseriatus And Zoosophus Groups Of The Aedes (Protomacleaya) (Diptera: Culicidae)., David B. Taylor
David B. Taylor
Interspecific hybridization was used to examine the genetics of species divergence and phylogeny of mosquitoes in the Triseriatus and Zoosophus groups of Aedes (Protomacleaya). Aedes zoosophus Dyar & Knab exhibited a relatively high degree of reproductive compatibility with Triseriatus group species. Crosses between A. zoosophus and A. triseriatus (Say) produced fertile female and sterile, intersex, male progeny. Crosses between A. zoosophus females and A. brelandi Zavortink males were sterile with no egg embryonation observed. Crosses between A. zoosophus males and A. brelandi females and reciprocal crosses between A. zoosophus and A. hendersoni (Cockerell) produced sterile, intersex female and …