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

scholarly journals The Effect of Foliar Boron Application on Seed Production of Alfalfa (Medicago sativa L.)

2020 ◽  
Vol 1 (2) ◽  
pp. 60-64
Author(s):  
Wurentuya ◽  
Lingling Chen
Keyword(s):  
Medicago Sativa ◽  
Seed Production ◽  
Seed Yield ◽  
Foliar Application ◽  
Pollen Viability ◽  
Positive Effects ◽  
Yield And Quality ◽  
Alfalfa Seed ◽  
Medicago Sativa L

Boron (B) is an essential micronutrient for plant reproductive growth and seed setting. A better understanding of the reasonable application rate of B could provide guidelines for improving seed yield and quality. In this study, we used five B concentrations (0, 400, 800, 1200, and 1600 mg B L-1) to study the effect of foliar application of B on seed yield and quality of alfalfa (Medicago sativa L.) in northern China. Our results indicated that foliar B application increased the pollen number, pollen viability, and dry weight and B concentration of alfalfa reproductive organs. The effect of B on alfalfa seed yield can be attributed to affecting the number of inflorescence and the seeds per pod. Foliar application with 800 mg B L-1 made quantitative and qualitative improvements in seed yield and quality of alfalfa. These results help to explain the positive effects of B on alfalfa seed production.

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

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

POLISH RAPESEED AS A COMPANION CROP FOR ESTABLISHING FORAGES IN NORTHEASTERN SASKATCHEWAN

1984 ◽  
Vol 64 (3) ◽  
pp. 677-682 ◽  
Author(s):  
J. WADDINGTON ◽  
S. BITTMAN
Keyword(s):  
Medicago Sativa ◽  
Brassica Campestris ◽  
Growth Suppression ◽  
Bromus Inermis ◽  
Seeding Date ◽  
Forage Species ◽  
Medicago Sativa L ◽  
Companion Crop

Forages were seeded with and without a Polish rapeseed (Brassica campestris L.) companion crop at two dates in each of 3 yr. In each test, forage seedlings grew much better where seeded alone; growth under the companion crop varied from poor to fairly good, depending on the year and the forage species. Russian wild ryegrass (Elymus junceus Fisch.) established poorly under rapeseed. Bromegrass (Bromus inermis Leyss.) establishment was satisfactory in all tests, although production in the year following was usually much less than where it was seeded alone. Alfalfa (Medicago sativa L.) and sainfoin (Onobrychis viciaefolia Scop.) establishment was poor to fair under rapeseed. A mid-May seeding date with the companion crop resulted in better forage growth by fall than a later seeding date. A feature of all tests was the severe infestation of volunteer rapeseed the year following seeding in all forages except bromegrass. Because of growth suppression during the establishment year, and difficulties with volunteer rapeseed in legumes in the year following establishment, it is suggested that Polish rapeseed is not a good companion crop when establishing legumes and Russian wild ryegrass.Key words: Bromegrass, alfalfa, Russian wild ryegrass, sainfoin, rapeseed, companion crops, forage establishment

Effects of row spacing and plant growth regulation on alfalfa seed yield (Medicago sativa L.)

2020 ◽  
Vol 52 (5) ◽  
Author(s):  
Duro Pajcin ◽  
Savo Vuckovic ◽  
Vera Popovic ◽  
Aleksandar Simic ◽  
Sandra Popovic ◽  
...  
Keyword(s):  
Plant Growth ◽  
Medicago Sativa ◽  
Seed Yield ◽  
Growth Regulation ◽  
Row Spacing ◽  
Plant Growth Regulation ◽  
Alfalfa Seed ◽  
Medicago Sativa L

Desiccation of Field Bindweed (Convolvulus arvensis) in Alfalfa (Medicago sativa) Seed Fields with Glyphosate

1989 ◽  
Vol 3 (1) ◽  
pp. 99-101 ◽  
Author(s):  
Douglas S. Packer ◽  
James M. Krall
Keyword(s):  
Medicago Sativa ◽  
Seed Production ◽  
Seed Yield ◽  
Field Experiments ◽  
Volume Control ◽  
Convolvulus Arvensis ◽  
Yield And Quality ◽  
Field Bindweed ◽  
Alfalfa Seed ◽  
Low Volume

The effect of glyphosate applied as a desiccant to field bindweed-infested alfalfa in the final year of seed production was examined in field experiments near Lovelock, NV. Glyphosate at 2.5 and 5.0 kg ae/ha flat fan applied was equal to and/or superior to dinoseb for desiccation of foliage, respectively. Alfalfa seed yield and quality following glyphosate treatment were similar to that of dinoseb-treated alfalfa. Glyphosate treatment reduced some alfalfa and field bindweed stands. A beneficial interaction between low-volume control droplet application (CDA) and glyphosate was not evident.

scholarly journals Stink bug Agonoscelis spp. (Heteroptera: Pentatomidae)-An Emerging Threat for Seed Production in Alfalfa Crop (Medicago sativa L.) and Their Successful Management

2021 ◽  
Author(s):  
Haider Karar ◽  
Muhammad Amjad Bashir ◽  
Abdul Khaliq ◽  
Muhammad Jaffar Ali ◽  
Reem Atalla Alajmi ◽  
...  
Keyword(s):  
Medicago Sativa ◽  
Seed Production ◽  
Seed Yield ◽  
Chemical Control ◽  
Integrated Management ◽  
Management Program ◽  
Stink Bug ◽  
Alfalfa Seed ◽  
Feeding Value ◽  
Heteroptera Pentatomidae

AbstractForages are vital constituent for sustainable agriculture because they provide feed for animals that ultimately converted into human food. Alfalfa is one of the most important forages that has highest feeding value for livestock, and seed production of alfalfa seriously affected by several factors, but seed yield loss due to stink bug attack is more as compared to other factors. Studies were conducted to control stink bug by different insecticides at Fodder Research Institute, Sargodha, Punjab-Pakistan during 2016-17. The efficacy of ten insecticides viz., acephate, dimethoate, malathion, chlorpyriphos, bifenthrin, lambdacyhalothrin, deltamethrin, acetamiprid, imidacloprid and carbosulfan were tested against stink bug, Agonoscelis spp. (Heteroptera Pentatomidae) on alfalfa, Medicago sativa L. variety SGD-2002. The mortality of stink bug was recorded one, three, five, seven, ten and fifteen days after spray. Similarly the population of pollinators was recorded before and one, three and five days after spray. From this study it had been observed that acetamiprid (81.14 %) and acephate (80.65%) had the higest mortality of stink bug and proved to be the most effective insecticides against stink bug. By spray of insecticides the population of pollinators declined one day after spray, but it had been rehabilitated three days after spray. By chemical treatment against stink bug, seed yield increased from 28.05 Kg/acre (during last four year without chemical control of stink bug) to 116 Kg/acre in 2016-17 (with chemical control). From this study it has been concluded that chemicals can be used in integrated management program of alfalfa seed production.

Attractiveness of alfalfa (Medicago sativa L.) to wild pollinators in relation to wildflowers

1994 ◽  
Vol 74 (4) ◽  
pp. 779-783 ◽  
Author(s):  
B. Brookes ◽  
E. Small ◽  
L. P. Lefkovitch ◽  
H. Damman ◽  
D. T. Fairey
Keyword(s):  
Medicago Sativa ◽  
Seed Production ◽  
Relative Number ◽  
Alfalfa Seed ◽  
Medicago Sativa L

This study attempted to assess the effects of proximity to wildflowers on the relative number of pollinators foraging on alfalfa flowers, as this information may bear on alfalfa seed production, an important industry in Canada. Five hundred and forty-five collections were made of wild pollinating bees attracted to 20 alfalfa plantations in Canada. Of the 13 genera of bees collected, almost half belonged to Megachile, followed by Bombus with 20% of the collections. Analysis indicated that increased visitation to alfalfa was significantly related to distance of the alfalfa from wildflowers, but not to the size of the alfalfa plantation. Alfalfa growing less than 10 m from wildflowers seemed to benefit by spill-over ("facilitation") of pollinators from the wildflowers. Alfalfa isolated from wildflowers by other alfalfa plants for a distance of at least 200 m attracted very few pollinators, the wildflowers apparently providing more attractive sources of pollen and nectar. A single plantation highly isolated (by about 600 m) from wildflowers proved to be very attractive to pollinators, apparently because wild nesting bees in the vicinity had little alternative but the alfalfa. These observations may be useful in exploring crop layouts to maximize attraction of wild pollinators for seed production. Key words:Medicago sativa, alfalfa, pollinators, competition, facilitation, seed production

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