Effect of 2-chloroethylphosphonic acid and gibberellic acid on survival of tall and dwarf peas grown in root rot soils

1969 ◽  
Vol 47 (11) ◽  
pp. 1659-1662
Author(s):  
W. G. Benedict ◽  
D. des S. Thomas
Keyword(s):  
Pisum Sativum ◽  
Adverse Effects ◽  
Gibberellic Acid ◽  
Root Rot ◽  
Flowering Stage ◽  
Pisum Sativum L ◽  
Early Emergence ◽  
Delayed Emergence ◽  
Soil Temperatures

Seeds of peas, Pisum sativum L. varieties Alaska and Early June, were soaked for 3 hours in 2.3 × 10−3 M 2-chloroethylphosphonic acid (CEPA) or 3 × 10−5 M gibberellic acid (GA3), sown in steamed or root rot soils, and grown to flowering stage at controlled soil temperatures with 14 hours per day of 32 000 lumens per square meter. CEPA delayed emergence and decreased survival in var. Alaska, but increased survival in var. Early June between 14 C and 18 C. GA3 decreased survival in both varieties. Early emergence was followed by increased wilting. CEPA showed antigibberellin activity, in most instances counteracting the adverse effects of GA3.

Response of Aphanomyces euteiches mycelia, zoospore, and oospore to oat extract

2004 ◽  
Vol 84 (2) ◽  
pp. 687-690
Author(s):  
M. A. Chandler ◽  
V. A. Fritz ◽  
R. R. Allmaras
Keyword(s):  
Pisum Sativum ◽  
Root Rot ◽  
Green Manure ◽  
Mycelial Growth ◽  
Late Summer ◽  
Aphanomyces Euteiches ◽  
Economic Threat ◽  
Pisum Sativum L ◽  
Production Research ◽  
Reduce Disease Severity

Root rot (Aphanomyces euteiches Drechs.) is a serious economic threat to pea (Pisum sativum L.) production. Research has shown a late-summer-seeded oat (Avena sativa L .) crop can reduce disease severity. A. euteiches was exposed to extracts of oat cvs. Bay and Ogle. Oat extract significantly enhanced mycelial growth of the pathogen. Key words: Root rot, biological control, green manure, Pisum sativum

Modification of chromium (VI) phytotoxicity by exogenous gibberellic acid application in Pisum sativum (L.) seedlings

2010 ◽  
Vol 33 (4) ◽  
pp. 1385-1397 ◽  
Author(s):  
Savita Gangwar ◽  
Vijay Pratap Singh ◽  
Prabhat Kumar Srivastava ◽  
Jagat Narayan Maurya
Keyword(s):  
Pisum Sativum ◽  
Gibberellic Acid ◽  
Chromium Vi ◽  
Pisum Sativum L

Response of Pisum sativum L. to Gibberellic Acid Seed Treatment 1

1970 ◽  
Vol 62 (2) ◽  
pp. 291-293
Author(s):  
I. D. Teare ◽  
A. G. Law ◽  
V. E. Wilson
Keyword(s):  
Pisum Sativum ◽  
Gibberellic Acid ◽  
Seed Treatment ◽  
Pisum Sativum L

Endomitosis and the effect of gibberellic acid in different Pisum sativum L. cultivars

Planta ◽  
1982 ◽  
Vol 156 (6) ◽  
pp. 553-559 ◽  
Author(s):  
A. Callebaut ◽  
P. Van Oostveldt ◽  
R. Van Parijs
Keyword(s):  
Pisum Sativum ◽  
Gibberellic Acid ◽  
Pisum Sativum L

ESTIMATION OF PEA YIELD LOSS FROM SEVERE ROOT ROT AND DROUGHT STRESS USING AERIAL PHOTOGRAPHS AND A LOSS CONVERSION FACTOR

1978 ◽  
Vol 58 (1) ◽  
pp. 159-164 ◽  
Author(s):  
P. K. BASU ◽  
H. R. JACKSON ◽  
V. R. WALLEN
Keyword(s):  
Drought Stress ◽  
Pisum Sativum ◽  
Root Rot ◽  
Yield Loss ◽  
Conversion Factor ◽  
Aerial Photographs ◽  
Average Yield ◽  
Affected Area ◽  
Black And White ◽  
Pisum Sativum L

Vertical aerial photographs were taken over commercial pea (Pisum sativum L.) fields in the Picton-Wellington region, Ontario, in 1975 (a drought year) and in 1976 (a non-drought year) using Kodak Aerochrome Infrared film 2443. Optical separations into black and white images were necessary to assist in delineating healthy crop boundaries from severe root rot- and drought-affected areas (37.14%) as well as void areas (5.29%) from 1975 photographs of 12 selected fields. In these fields, excluding the void areas, an estimated yield loss of 22.7% was calculated by multiplying the percentage of the affected area by an average yield loss conversion factor of 0.61 derived from all available data from greenhouse- and field-grown plants of several commercial pea cultivars.

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