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Articles 1 - 9 of 9
Full-Text Articles in Life Sciences
Tb129: Chemical Control Of Balsam Gall Midge Paradiplosis Tumifex Gagne (Diptera: Cecidomyiidae), R. L. Bradbury, E. A. Osgood
Tb129: Chemical Control Of Balsam Gall Midge Paradiplosis Tumifex Gagne (Diptera: Cecidomyiidae), R. L. Bradbury, E. A. Osgood
Technical Bulletins
This study was undertaken to test new insecticides for control of the balsam gall midge and to determine effectiveness of later insecticide application in order to expand the effective period for control.
Tb128: Beauveria Bassiana For Control Of Colorado Potato Beetle (Coleoptera: Chrysomelidae) In Maine, R. H. Storch, J. F. Dill
Tb128: Beauveria Bassiana For Control Of Colorado Potato Beetle (Coleoptera: Chrysomelidae) In Maine, R. H. Storch, J. F. Dill
Technical Bulletins
Beauveria bassiana (Balsamo) Vuill. (Bb), a fungal pathogen of the Colorado potato beetle has been used to control CPB in Europe. Preliminary studies in the United States gave promising results for CPB control by using the fungus. Based on these studies, a three-year pilot program was initiated to evaluate the potential for using Bb o control the Colorado potato beetle in the U.S. We report herein on the results obtained in southern Maine from using this mycoinsecticide to control the beetle.
Tb127: Age And Thinning Effects On Wood Properties Of Red Spruce (Picea Rubens Sarg.), Michael P. Wolcott, Robert K. Shepard, James E. Shottafer
Tb127: Age And Thinning Effects On Wood Properties Of Red Spruce (Picea Rubens Sarg.), Michael P. Wolcott, Robert K. Shepard, James E. Shottafer
Technical Bulletins
Ten overstory red spruce were selected from a thinned stand and 1 0 from an unthinned stand. Average age of sample trees was approximately 80 years. Specific gravity reached a maximum at age 53 in the thinned stand and age 72 in the unthinned stand, after which it remained relatively constant. Stiffness reached a maximum at ages 35 and 50, and bending strength at ages 41 and 54; both remained relatively constant with further increases in age. Stiffness showed the largest relative difference between juvenile and mature wood, 22%, and specific gravity the smallest difference, 8%. Thinning did not adversely …
Studies On Times Of Lambing In Ewes Grazing Subterranean Clover Based Pastures In Relation To Stocking Rates In South-Western Australia, H Lloyd Davies
Studies On Times Of Lambing In Ewes Grazing Subterranean Clover Based Pastures In Relation To Stocking Rates In South-Western Australia, H Lloyd Davies
Technical Bulletins
The investigation is reported in six parts: effect on ewe liveweight and fertility, lamb losses, effect on lamb growth and subsequent growth after weaning, wool production, pasture production and composition, and conclusions and practical implications. The results show that in the absence of supplementary feeding the physiological requirements of ewes in late pregnancy are better met by spring rather than autumn lambing.
Tb125: Fertilization Of Eastern White Pine (Pinus Strobus L.) In Maine Shows Economic Potential, Robert K. Shepard, Thomas B. Brann
Tb125: Fertilization Of Eastern White Pine (Pinus Strobus L.) In Maine Shows Economic Potential, Robert K. Shepard, Thomas B. Brann
Technical Bulletins
Plots in seven eastern white pine sawlog stands were treated with nitrogen at rates of 0, 56, 112, and 224 kg/ha. After four years the largest increase in basal area growth, 0.31 dm2 /tree, and volume growth, 13.0 m3 /ha, occurred in plots that received 112 kg/ha. It appears that an application rate of 112 kg/ha may provide a real return of 15% or more in some stands.
Residual Value Of Rock Phosphate Fertilizers, J W. Bowden, Michael D A Bolland
Residual Value Of Rock Phosphate Fertilizers, J W. Bowden, Michael D A Bolland
Technical Bulletins
The residual value of Christmas Island C-grade ore, 500 degrees C heated (calcined) C-grade ore (Calciphos), and superphosphate was measured in three experiments. Plant yield, and bicarbonate-soluble phosphorus extracted from the top 10 cm of soil were used to indicate the effectiveness of the four fertilizers. Using either of these indicators, superphosphate was the most effective fertilizer.
Wheat And Barley Experiments On The Kumarl Soils At Salmon Gums, D A. Collins, Michael D A Bolland, R D. Fletcher
Wheat And Barley Experiments On The Kumarl Soils At Salmon Gums, D A. Collins, Michael D A Bolland, R D. Fletcher
Technical Bulletins
The water-holding capacity of these soils, and their location in a low rainfall area combine to make them marginal for producing grain. In contrast to sowing wheat on ley pasture, mechanically fallowing the year before planting markedly improved grain yields by 1.3 to 4 times.
Serradella, Subterranean Clover And Medic Research, Esperance, Western Australia, Michael D A Bolland
Serradella, Subterranean Clover And Medic Research, Esperance, Western Australia, Michael D A Bolland
Technical Bulletins
Strains of O. compressus which originate from Paros in southern Greece were the earliest flowering serradellas tested. They consistently produced amongst the highest seed yields, are relatively hard-seeded and are worthy of further investigation for deep sands and very acid soils in low rainfall areas. Monthly applications of nitrogenous fertilizer about doubled the herbage yields of serradella in winter.
An Inventory And Condition Survey Of Rangelands In The Carnarvon Basin, Western Australia, A L. Payne, G F. Spencer, P J. Curry
An Inventory And Condition Survey Of Rangelands In The Carnarvon Basin, Western Australia, A L. Payne, G F. Spencer, P J. Curry
Technical Bulletins
The inventory and condition survey of rangelands in the Carnarvon Basin, undertaken by the Department of Agriculture and Food, Western Australia (DAFWA) between 1980 and 1982, describes and maps the natural resources of the region’s pastoral leasehold land. This survey report provides a baseline record of the existence and condition of the natural area’s resources, to assist with the planning and implementation of land management practices. The report identified and described the condition of soils, landforms, vegetation, habitat, ecosystems, and declared plants and animals. It also assessed the impact of pastoralism and made land management recommendations. The area surveyed covers …