Megachile rotundata (Fab.) as a potential agro‐environmental conservation strategy for alfalfa seed production in Argentina

2021 ◽  
Author(s):  
Juan P. Renzi ◽  
Carlos Coito ◽  
Omar Reinoso ◽  
Matías Quintana ◽  
Flavia García ◽  
...  
Keyword(s):  
Seed Production ◽  
Environmental Conservation ◽  
Conservation Strategy ◽  
Megachile Rotundata ◽  
Alfalfa Seed

OCCURRENCE OF CHALKBROOD CAUSED BY ASCOSPHAERA AGGREGATA SKOU IN A NATIVE LEAFCUTTING BEE, MEGACHILE PUGNATA SAY (HYMENOPTERA: MEGACHILIDAE), IN SASKATCHEWAN

1992 ◽  
Vol 124 (3) ◽  
pp. 557-558 ◽  
Author(s):  
D.W. Goerzen ◽  
L. Dumouchel ◽  
J. Bissett
Keyword(s):  
United States ◽  
Seed Production ◽  
Western Canada ◽  
Nest Material ◽  
Megachile Rotundata ◽  
Alfalfa Seed ◽  
Low Levels

The alfalfa leafcutting bee, Megachile rotundata (Fab.), is a domesticated pollinator important for alfalfa seed production in western Canada. Populations of M. rotundata are highly susceptible to chalkbrood, a disease caused by the fungus Ascosphaera aggregata Skou. The disease has caused high mortalities in M. rotundata populations in the northwestern United States since 1972. It was found in Manitoba in 1982, Alberta in 1983, and Saskatchewan in 1984 (Richards 1985). In subsequent surveys, A. aggregata has been detected only sporadically and at low levels of infection in Saskatchewan M. rotundata populations (Goerzen 1991). A previously reported observation of A. aggregata in the native leafcutting bee M. relativa Cresson (Goerzen et al. 1990) indicated that the disease is present in native leafcutting bee species which commonly immigrate into alfalfa leafcutting bee nest material.

Spittle Bugs in Relation to Alfalfa Seed Production in Wisconsin

1947 ◽  
Vol 40 (3) ◽  
pp. 446-448 ◽  
Author(s):  
J. M. Scholl ◽  
J. T. Medler
Keyword(s):  
Seed Production ◽  
Alfalfa Seed

Preharvest glyphosate in alfalfa for seed production: Effect on alfalfa seed yield and quality

2003 ◽  
Vol 83 (1) ◽  
pp. 189-197 ◽  
Author(s):  
W. E. May ◽  
H. A. Loeppky ◽  
D. C. Murrell ◽  
C. D. Myhre ◽  
J. J. Soroka
Keyword(s):  
Seed Production ◽  
Seed Yield ◽  
Seed Quality ◽  
Seedling Emergence ◽  
Canada Thistle ◽  
Seedling Vigour ◽  
Yield And Quality ◽  
Alfalfa Seed ◽  
Medicago Sativa L ◽  
Seed Yields

Preharvest applications of glyphosate have been shown to be effective in controlling Canada thistle in annual crops, but may reduce alfalfa seed yield depending on time and rate of application. The objective of this study was to determine the effect of preharvest applications of glyphosate on subsequent alfalfa seed yield and quality. The effects of timing, 1, 26, 51 and 76% alfalfa seed pod maturity, and rate, 0, 440, 880, 1320, and 1760 g a.i. ha-1, of a preharvest application of glyphosate on alfalfa seed yield and quality in the year of application, and regrowth and seed yield in the following year were determined. The rate of glyphosate applied did not affect seed yield in the application year; however, in the following year, growth and seed yield were reduced as rates increased. Delaying the application of glyphosate increased seed yields in the application year, but decreased alfalfa regrowth and flowering the following year. Germination and seedling emergence were not affected by the rate or timing of the glyphosate. A preharvest application of glyphosate at 1760 g a.i. ha-1 at 76% pod maturity is a viable option in the last year of seed production. Key words: Alfalfa (Medicago sativa L.), glyphosate, abnormal seeds, seed quality, and seedling vigour

EFFECT OF TWO INSECT VIRUSES AND TWO ENTOMOPATHOGENIC FUNGI ON LARVAL AND PUPAL DEVELOPMENT IN THE ALFALFA LEAFCUTTING BEE, MEGACHILE ROTUNDATA (FAB.) (HYMENOPTERA: MEGACHILIDAE)

1990 ◽  
Vol 122 (5) ◽  
pp. 1039-1040 ◽  
Author(s):  
D.W. Goerzen ◽  
M.A. Erlandson ◽  
K.C. Moore
Keyword(s):  
Apis Mellifera ◽  
Insect Pest ◽  
Microbial Control ◽  
Western Canada ◽  
Pest Species ◽  
Megachile Rotundata ◽  
Pupal Development ◽  
Canadian Prairies ◽  
Alfalfa Seed ◽  
Beneficial Insect

The alfalfa leafcutting bee, Megachile rotundata (Fab.), is an important pollinator of alfalfa in western Canada and is widely utilized for alfalfa seed production (Richards 1984). As a beneficial insect, the alfalfa leafcutting bee must be considered, along with the honey bee, Apis mellifera L., as a non-target organism of importance in evaluations of potential microbial control agents for use against major insect pest species on the Canadian prairies.

Tourism Development, Conservation, and Anthropology

1992 ◽  
Vol 14 (2) ◽  
pp. 14-17
Author(s):  
Veronica Long
Keyword(s):  
Environmental Protection ◽  
Tourism Development ◽  
Environmental Conservation ◽  
Conservation Strategy ◽  
Conservation And Development

Environmental conservation, having long been the domain of physical scientists, now appears to have a void that can be filled by anthropologists. This opening is due to a new relationship between conservation and development and to new philosophies for the management of areas designated for environmental protection. Both changes involve integrating people and their needs into conservation strategy.

scholarly journals Insecticide Efficacy in Alfalfa Seed Production, 2013

2016 ◽  
Vol 41 (1) ◽  
pp. tsw026
Author(s):  
Eric T. Natwick ◽  
Martin I. Lopez
Keyword(s):  
Seed Production ◽  
Insecticide Efficacy ◽  
Alfalfa Seed

Desiccation of alfalfa for seed production with diquat and glufosinate

1996 ◽  
Vol 76 (3) ◽  
pp. 435-439 ◽  
Author(s):  
J. R. Moyer ◽  
S. N. Acharya ◽  
J. Fraser ◽  
K. W. Richards ◽  
N. Foroud
Keyword(s):  
Key Words ◽  
Seed Production ◽  
Seed Yield ◽  
Seed Weight ◽  
Viable Seed ◽  
Hard Seed ◽  
Alfalfa Seed ◽  
Percent Germination ◽  
Medicago Sativa L ◽  
Seed Yields

Recommendations for desiccation of alfalfa do not clearly define the stage at which desiccants should be applied. To obtain this information, diquat and glufosinate were applied to alfalfa (Medicago sativa L) from 1991 to 1994 at various stages of maturity to determine the effect of desiccant and stage of maturity at desiccation on seed yield 1000-seed weight and seed germinability. Alfalfa seed yields, 1000-seed weights, percent germination and percent viable seed were similar after desiccation with diquat and glufosinate. Desiccation when 60–75% of the alfalfa seed pods were brown permitted maximum seed yields. Percent germination increased slightly in seeds that were exposed to weathering under normal conditions until all pods turned brown. Both desiccants adequately desiccated alfalfa for harvesting but desiccation with glufosinate took 2 or 3 d longer than diquat. Desiccants did not reduce alfalfa growth in the spring after application. Key words: Germination, yield, hard seed, seed weight, stage

scholarly journals Alfalfa Seed Production Insecticide Efficacy in 2014

2016 ◽  
Vol 41 (1) ◽  
pp. tsw027
Author(s):  
Eric T. Natwick ◽  
Martin I. Lopez
Keyword(s):  
Seed Production ◽  
Insecticide Efficacy ◽  
Alfalfa Seed

EFFECTS OF ESTABLISHMENT METHOD AND A RAPESEED COMPANION CROP ON ALFALFA SEED YIELD

1987 ◽  
Vol 67 (1) ◽  
pp. 263-266 ◽  
Author(s):  
J. WADDINGTON ◽  
N. MALIK
Keyword(s):  
Medicago Sativa ◽  
Seed Production ◽  
Seed Yield ◽  
Brassica Campestris ◽  
Establishment Method ◽  
Alfalfa Seed ◽  
Medicago Sativa L ◽  
Companion Crop

In two experiments at Melfort using alfalfa (Medicago sativa L. ’Beaver’) seeded at a rate of 2 kg ha−1 with and without a Polish rapeseed (Brassica campestris L. ’Candle’) companion crop seeded at 5.5 kg ha−1, rapeseed yields in the establishment year were maximum when alfalfa and rapeseed were mixed and planted in 15-cm rows. Alfalfa showed no consistent seed yield differences between broadcast seeding, seeding in 15- or 61-cm rows, or seeding with or without the companion crop.Key words: Alfalfa, rapeseed, Brassica campestris, seed production

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