Germination of R-55 Repellent Treated and Non-Treated Seeds of White Spruce Following Prolonged Cold Storage

1980 ◽  
Vol 56 (2) ◽  
pp. 60-62
Author(s):  
A. Radvanyi
Keyword(s):  
Small Mammals ◽  
Cold Storage ◽  
Forest Regeneration ◽  
White Spruce ◽  
Past Experience ◽  
Significant Decline ◽  
Direct Seeding ◽  
Seed Supply ◽  
Coating Formulation

Depredation of broadcast seed supplies by small mammals has frequently caused forest regeneration endeavours by direct seeding methods to fail and have pointed out the need for a more effective coating formulation to protect the seed supply. Past experience has indicated coniferous seeds may not always be promptly sown following treatment and seeds are frequently returned to cold storage. Tests indicate white spruce seeds treated with the newly developed R-55 rodent repellent/graphite formulation can be safely stored for at least 5.5 years without a significant decline in germinative capacity.

Effects of Four Years Storage on Germination of R-55 Repellent-Treated White Spruce Seeds

1977 ◽  
Vol 53 (3) ◽  
pp. 139-141
Author(s):  
A. Radvanyi
Keyword(s):  
Cold Storage ◽  
White Spruce ◽  
Phytotoxic Effects ◽  
Coating Formulation

The need for a more effective coating formulation to protect white spruce seeds from rodent depredation led to experimentation using a potent rodent repellent, R-55. Germination tests were conducted at two- to three-month intervals over a period of four years to determine possible phytotoxic effects of the R-55 coating when seeds were returned to cold storage. Germination of treated seeds declined only moderately over this period.

scholarly journals Effect of storage on germination of R-55 repellent-treated seed of white spruce

1975 ◽  
Vol 51 (1) ◽  
pp. 21-23 ◽  
Author(s):  
A. Radvanyi
Keyword(s):  
Seed Viability ◽  
Weight Ratio ◽  
White Spruce ◽  
Seed Fate ◽  
Seed Supply ◽  
Treated Seed ◽  
Tracer Methods ◽  
Coating Formulation ◽  
Radio Tracer

Determination of seed fate by radio-tracer methods have indicated seed losses to small mammals in Alberta could be as high as 50% during some years even when the widely accepted formulation of aluminum powder-endrin-arasan-latex had been applied to protect the seed supply in direct seeding operations. The need for a better seed coating formulation led to the development and evaluation of a potent rodent repellent, R-55, to protect spruce seeds from rodent damage. As part of the evaluation of this repellent, white spruce seeds were coated with a 4:1 (weight ratio) mixture R-55/graphite and latex. Treated and non-treated (controls) seed lots were stored in a refrigerator for a 2-year period during which eight germination tests were conducted at 2–3 month intervals to test seed viability. Except for one slight mid-winter decline in germination corresponding to a possible seasonal response of the seeds, no significant decline in germination resulted with storage up to 2 years duration. Studies with other coniferous seeds suggest considerable variability in seed species in response to the R-55/graphite coating and to storage of the treated seed.

Small Mammals and Regeneration of White Spruce Forests in Western Alberta

Ecology ◽  
1970 ◽  
Vol 51 (6) ◽  
pp. 1102-1105 ◽  
Author(s):  
Andrew Radvanyi
Keyword(s):  
Small Mammals ◽  
White Spruce ◽  
Spruce Forests

Modeling birch seed supply and seedling establishment during forest regeneration

2017 ◽  
Vol 352 ◽  
pp. 31-39 ◽  
Author(s):  
Emma Holmström ◽  
Matts Karlsson ◽  
Urban Nilsson
Keyword(s):  
Seedling Establishment ◽  
Forest Regeneration ◽  
Seed Supply

SOIL APPLICATION OF CARBOFURAN TO CONTROL SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (LEPIDOPTERA: TORTRICIDAE), IN A MANAGED WHITE SPRUCE SEED PRODUCTION AREA

1981 ◽  
Vol 113 (10) ◽  
pp. 949-951 ◽  
Author(s):  
W. H. Fogal ◽  
D. A. Winston ◽  
S. M. Lopushanski ◽  
D. A. MacLeod ◽  
A. J. Willcocks
Keyword(s):  
Seed Production ◽  
Picea Glauca ◽  
Choristoneura Fumiferana ◽  
Spruce Budworm ◽  
White Spruce ◽  
Cone Production ◽  
Seed Supply ◽  
Current Outbreak ◽  
Production Area ◽  
Production Areas

White spruce, Picea glauca (Moench) Voss, is a major commercial tree species used in reforestation programs throughout Canada, and seed requirements cannot be met in some years because of insect damage and the periodic nature of cone crops. The spruce budworm, Choristoneura fumiferana (Clem.), feeds on buds and cones of its hosts, causing a pronounced decrease in cone production (Schooley 1978). A current outbreak in northeastern Ontario poses a serious threat to white spruce seed supply from high value, managed seed production areas. Therefore, in 1979, we began an experiment to determine whether carbofuran, a systemic insecticide, could be used to protect buds and cones when applied to soil. We chose carbofuran because it has proved successful for control of some insects in seed orchards in the southeastern United States (DeBarr 1978)

Effects of early cone collection and artificial ripening on white spruce and red pine germination

1981 ◽  
Vol 11 (4) ◽  
pp. 817-826 ◽  
Author(s):  
D. A. Winston ◽  
B. D. Haddon
Keyword(s):  
Relative Humidity ◽  
Seed Dispersal ◽  
Cold Storage ◽  
White Spruce ◽  
Storage Conditions ◽  
Red Pine ◽  
Optimum Conditions ◽  
Seed Stratification ◽  
Pine Cones ◽  
Good Germination

Two experiments were conducted at the Petawawa National Forestry Institute, Chalk River, Ontario, in 1978 to test the feasibility of early cone collection and to determine the optimum conditions for the artificial ripening of white spruce and red pine cones. Cones were collected at periodic intervals, commencing 7 weeks before natural cone ripeness, and stored under four storage conditions and three storage periods. White spruce cones collected August 1, 4 weeks before natural seed dispersal, and stored on open, screened trays for 12 weeks at 5 °C and 75–95% relative humidity yielded seeds of high germinability. Seeds extracted from cones immediately after this collection failed to germinate. Cold storage of white spruce cones at 5 °C for as little as 4 weeks eliminated dormancy and the subsequent need for seed stratification after extraction. Good germination of red pine seeds was obtained from cones collected August 16, 7 weeks before natural seed dispersal, and stored on screened trays in a well-ventilated, unheated building, for 4 weeks.Completion of embryo growth must be attained before artificial ripening can be successfully applied; it may be used as an index for commencement of cone collections provided subsequent cone handling includes artificial ripening.

Influence of flooding and soil temperature on the water relations and morphological development of cold-stored black spruce and white spruce seedlings

1987 ◽  
Vol 17 (8) ◽  
pp. 821-828 ◽  
Author(s):  
Steven C. Grossnickle
Keyword(s):  
Root Growth ◽  
Soil Temperature ◽  
Cold Storage ◽  
Black Spruce ◽  
White Spruce ◽  
Morphological Development ◽  
Pressure Potential ◽  
Xylem Pressure Potential ◽  
Soil Temperatures ◽  
Flow Through

Fall-lifted, cold-stored black spruce (Piceamariana (Mill.) B.S. P.) and white spruce (Piceaglauca (Moench) Voss) seedlings [Formula: see text] were planted in a controlled environmental chamber with an air temperature of 20 °C, soil temperatures of 10 or 20 °C, and flooded or nonflooded soil treatments. Stomatal conductance (gwv) was lower in flooded seedlings compared with nonflooded seedlings for both black spruce and white spruce seedlings. Black spruce seedlings drained after 14 days of flooding showed gwv similar to nonflooded seedlings, while drained white spruce seedlings had gwv patterns greater than nonflooded seedlings. White spruce seedlings had diurnal xylem pressure potential (ψx) patterns slightly more negative in the flooded treatment compared with the nonflooded treatment. Measured predawn ψx was found to be more negative in flooded seedlings compared with nonflooded seedlings in both black spruce and white spruce. In both species, flooded seedlings 1 day out of cold storage had a greater resistance to water flow through the soil–plant–atmosphere continuum (RSPAC) compared with non-flooded seedlings. After 21 days out of cold storage, rspac decreased in nonflooded seedlings of both species, while flooded seedlings of both species had high RSPAC values. For both black spruce and white spruce seedlings, flooded soils inhibited root growth, while low soil temperatures resulted in a reduction in root growth in nonflooded seedlings. Shoot growth of white spruce seedlings was not influenced by 21 days of flooding or low soil temperature, while the combination of 21 days of flooding and low soil temperature in black spruce seedlings resulted in less shoot development compared with nonflooded seedlings.

scholarly journals SEMEADURA DIRETA DE PATA-DE-VACA (Bauhinia ungulata L.) COM SEMENTES PRÉ-GERMINADAS PARA RESTAURAÇÃO FLORESTAL

Nativa ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 438-441
Author(s):  
Rubens Marques Rondon Neto ◽  
Fabrício Pereira de Jesus ◽  
Lucas Alves da Silva
Keyword(s):  
Survival Rate ◽  
Tree Species ◽  
Forest Restoration ◽  
Forest Regeneration ◽  
Direct Seeding ◽  
Artificial Regeneration ◽  
Degraded Area ◽  
Number Of Leaves ◽  
Direct Sowing ◽  
Germinated Seeds

Este estudo teve o objetivo de avaliar a estratégia de uso de sementes pré-germinadas de pata-de-vaca (Bauhinia ungulata L.) na semeadura direta para restauração florestal. Os tratamentos testados foram: T1= Plantio de mudas em tubetes (Testemunha); T2 = Semeadura direta sem pré-germinação; T3 = Semeadura direta com pré-germinação; T4 = Semeadura direta sem pré-germinação e hidrogel; e T5 = Semeadura direta com pré-germinação e hidrogel. O experimento foi instalado em blocos ao acaso com quatro repetições de 10 mudas ou pontos de sementes semeadas. Aos 100 e 210 dias de instalação do experimento foram feitas as seguintes avaliações: taxa de sobrevivência (Ts); altura total (Ht); diâmetro do colo (Dc); e número de folhas (Nf). A Ts e o crescimento morfológico de B. ungulata regeneradas pelo plantio de mudas não foram superadas pelas estratégias de semeaduras diretas utilizadas, mas a técnica demostrou ser promissora para futuros testes com outras espécies arbustivas e arbóreas de interesse à restauração florestal. Palavras-chave: área degradada; regeneração florestal; regeneração artificial.   Direct seeding of pata-de-vaca (Bauhinia ungulata L.) with pre-germinated seeds for forest restoration   ABSTRACT: This study aimed to evaluate the seed use strategy of using pre-germinated seeds of Bauhinia ungulata L. in direct sowing for forest restoration. The treatments tested were: T1 = Planting seedlings in tubes (Witness); T2 = Direct sowing without pre-germination; T3 = Direct sowing with pre-germination; T4 = Direct sowing without pre-germination and hydrogel; and T5 = Direct sowing with pre-germination and hydrogel. The experiment was installed in randomized blocks with four replications of 10 seedlings or points of seed sown. At 100 and 210 days after installation of the experiment, the following assessments were made: survival rate (Ts); total height (Ht); diameter (Dc); and number of leaves (Nf). The Ts and the morphological growth of B. ungulata regenerated by planting seedlings were not overcome by the direct seeding strategies used, but the technique proved to be promising for future tests with other shrub and tree species of interest to forest restoration. Keywords: degraded area; forest regeneration; artificial regeneration.

scholarly journals A Case for Direct Seeding of Woody Species on Highway Roadsides

1987 ◽  
Vol 5 (4) ◽  
pp. 176-179
Author(s):  
P. Lloyd Hipkins ◽  
James S. Coartney
Keyword(s):  
Native Species ◽  
Woody Species ◽  
Site Preparation ◽  
Past Experience ◽  
Direct Seeding ◽  
Maintenance Costs

The use of woody species on highway rights-of-way is a long standing practice which is coming under closer scrutiny as costs of landscape materials and maintenance increase. Direct-seeding of woody species may be an option to help control establishment costs. The use of native species may help to reduce maintenance costs as well as the mortality experienced with exotic landscape cultivars. Past experience has shown that successful direct-seeding can be accomplished with proper site preparation and planting techniques.

A New Coating Treatment for Coniferous Seeds

1970 ◽  
Vol 46 (5) ◽  
pp. 406-408 ◽  
Author(s):  
Andrew Radvanyi
Keyword(s):  
North America ◽  
Aluminum Powder ◽  
Small Mammals ◽  
Seed Coating ◽  
Highly Effective ◽  
Coating Procedure ◽  
Forest Lands ◽  
Coating Formulation

Excessive loss of seeds to small mammals has long been considered a major cause of inadequate regeneration of cutover forest lands in North America. While numerous compounds, devices, and practices to minimize such losses have been tried, a fully acceptable and effective seed-coating procedure has not been developed. In the study reported, the widely used seed-coating formulation using endrin, arasan, aluminum powder, and latex is examined, and a new seed-coating formulation employing a highly effective rodent repellent is suggested.

Sign in / Sign up

Export Citation Format

Share Document