scholarly journals The influence of host residues on the occurrence of some fungal diseases of red clover and alfalfa

2014 ◽  
Vol 9 (1) ◽  
pp. 53-66
Author(s):  
W. Truszkowska ◽  
B. Legieć
Keyword(s):  
Medicago Sativa ◽  
Red Clover ◽  
Fungal Diseases ◽  
Soilborne Pathogen ◽  
Verticillium Albo Atrum

Observations have been made on two hosts and their parasites: (1) <i>Trifolium paratense</i> L. with <i>Kabatilla caulivora</i> and <i>Phoma trifolii</i> and (2) <i>Medicago sativa</i> L. with <i>Ascochyta imperfecta</i> and <i>Verticillium albo-atrum</i>. It has been found that <i>K. caulivora</i> is not specially dangerous for red clover as a soilborne pathogen but, on the contrary, P. trifolii can persist in host residues within the soil. Similar to the latter fungus, <i>A. imperfecta</i> develop well in alfalfa remains in the soil and is therefore a very important danger for this host whilst <i>V.albo-atrum</i> (from DM), although not so dynamic, can non-the-less become a dangerous soil-borne pathogen were alfalfa residues are present.

scholarly journals Precrop Effect of Red Clover (Trifolium pratense L.) and Alfalfa (Medicago sativa L.) on the Population Development of the Northern Root-Knot Nematode Meloidogyne hapla Chitwood, 1949 and on Succeeding Crops—A Pot Study

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 722
Author(s):  
Renata Dobosz ◽  
Roman Krawczyk
Keyword(s):  
Population Density ◽  
Medicago Sativa ◽  
Trifolium Pratense ◽  
Red Clover ◽  
Continuous Cultivation ◽  
Nematode Population ◽  
Meloidogyne Hapla ◽  
Root Knot Nematode ◽  
Crop Species ◽  
Tomato Growth

The northern root-knot nematode, Meloidogyne hapla, is a major pest of many crop species. The objective of the study was to determine how M. hapla population dynamics is affected by two precrops, i.e., Trifolium pratense and Medicago sativa, in three crop durations: one, two and three years of continuous cultivation. Moreover, we set ourselves the task of evaluating the effect of the legume precrop soil on the growth of the succeeding tomato plant (Solanum lycopersicum) and on the nematode population. The experiment was performed outdoors in pots with naturally infected soil. Both precrop species investigated were found to modify the J2 nematode population density in the soil. The galls and nematode females with egg masses were observed on the roots of both studied plant species at the end of each growing season. They appeared to be more abundant on the red clover roots than on those of the alfalfa. The obtained data indicate that the spring soil sampling is more appropriate for the estimation of the M. hapla population density in the red clover precrop soil. The legume precrop soil had a limiting effect on tomato growth and fruit yield. The nematode population negatively influenced tomato growth. The experiment revealed that tomato plants could be planted in alfalfa precrop soil following at least three years of continuous alfalfa cultivation. The same cannot be said of the cultivation of red clover as a precrop for tomatoes.

scholarly journals Verticillium wilt (Verticillium albo-atrum) on Medicago sativa (alfalfa) in Iran

2004 ◽  
Vol 53 (6) ◽  
pp. 812-812 ◽  
Author(s):  
M. Ghalandar ◽  
E. Clewes ◽  
D. J. Barbara ◽  
R. Zare ◽  
A. Heydari
Keyword(s):  
Medicago Sativa ◽  
Verticillium Wilt ◽  
Verticillium Albo Atrum

COMPARISON OF YIELD COMPONENTS OF RED CLOVER AND ALFALFA

1988 ◽  
Vol 68 (1) ◽  
pp. 103-114 ◽  
Author(s):  
S. R. BOWLEY ◽  
C. T. DOUGHERTY ◽  
N. L. TAYLOR ◽  
P. L. CORNELIUS
Keyword(s):  
Medicago Sativa ◽  
Yield Components ◽  
Trifolium Pratense ◽  
Total Yield ◽  
Red Clover ◽  
Herbage Yield ◽  
Trifolium Pratense L ◽  
Medicago Sativa L ◽  
Stem Development ◽  
Selection For

Yield components of five regrowth cycles, two in 1981 and three in 1982, of three red clover (Trifolium pratense L.) populations and three alfalfa (Medicago sativa L.) cultivars were compared in swards. Red clover left more stubble but produced less herbage and accumulated total yield (herbage, stubble and 10 cm depth root) at a slower rate than alfalfa during most regrowths. The percent leaf at flowering of red clover was similar to that of alfalfa. Maximum LAI declined during successive regrowths each year. Maximum crop growth rates were 30 and 34 g m−2 d−1 for red clover and alfalfa, respectively. Stem development (canopy height) followed patterns of accumulation of herbage yield. The initiation of stems was slower in red clover and stem populations were less than that of alfalfa. Selection for faster stem initiation rates, higher stem populations, and reduced partitioning of dry matter towards stem bases which would be left as stubble were suggested as ways of increasing the herbage yield of red clover.Key words: Trifolium pratense L., Medicago sativa L., yield components, growth analysis clover (red), alfalfa

Resistance to Verticillium albo-atrum in lucerne (Medicago sativa L.) to distinguish between varieties

Euphytica ◽  
2006 ◽  
Vol 153 (1-2) ◽  
pp. 227-232 ◽  
Author(s):  
V. Molinéro-Demilly ◽  
B. Montegano ◽  
B. Julier ◽  
C. Giroult ◽  
P. Baudouin ◽  
...  
Keyword(s):  
Medicago Sativa ◽  
Medicago Sativa L ◽  
Verticillium Albo Atrum

scholarly journals A novel source of resistance to verticillium wilt in alfalfa

2004 ◽  
Vol 84 (1) ◽  
pp. 401-404 ◽  
Author(s):  
B. D. Gossen ◽  
P. G. Jefferson
Keyword(s):  
Medicago Sativa ◽  
Key Words ◽  
Verticillium Wilt ◽  
Field Resistance ◽  
Canadian Prairies ◽  
Disease Reaction ◽  
Resistant Cultivars ◽  
Verticillium Albo Atrum

Verticillium wilt (VW) can cause substantial losses in yield and stand longevity in alfalfa. Resistant cultivars are available, but susceptible cultivars continue to be grown on the Canadian Prairies, where VW generally occurs only under irrigation. A study was conducted to assess the yield and persistence of 11 alfalfa lines under irrigation on three commercial fields in southern Saskatchewan. An epidemic of verticillium wilt developed at one site; the disease reaction of the susceptible Medicago sativa ssp. falcata line ‘SC Mf3713’ was similar to that of the resistant cv. Barrier. SC Mf3713 may carry a novel form of field resistance to VW, and merits further study. Key words: Medicago sativa ssp. falcata, Verticillium albo-atrum

VERTICILLIUM WILT OF FORAGE LEGUMES IN CANADA

1964 ◽  
Vol 44 (5) ◽  
pp. 427-432 ◽  
Author(s):  
C. Aubé ◽  
W. E. Sackston
Keyword(s):  
North America ◽  
Verticillium Wilt ◽  
Red Clover ◽  
Birdsfoot Trefoil ◽  
Forage Legumes ◽  
Verticillium Albo Atrum

Verticillium albo-atrum R. and B. was isolated from diseased alfalfa and ladino clover at Normandin, Que., and V. dahliae Kleb. from red clover at Ottawa, Ont., in 1962. Isolates of V. albo-atrum were more pathogenic than V. dahliae to alfalfa and birdsfoot trefoil, and V. dahliae was more pathogenic to red clover. Comparative inoculation tests in the greenhouse showed that the Canadian isolates were as virulent on forage legumes as were legume isolates obtained from Britain. All isolates tested were strongly pathogenic to lupine and sainfoin. Birdsfoot trefoil, lupine, and ladino clover, not previously reported as hosts of Verticillium, proved susceptible in greenhouse tests.This is one of the first reports of virulent Verticillium on forage legumes in North America. Since diseased plants were found only at two experimental stations, the pathogen may have been introduced on seed imported from Europe. No Verticillium wilt was found at the same locations in 1963.

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