Microbiological differences between limed and unlimed soils and their relationship with cavity spot disease of carrots (Daucus carota L.) caused by Pythium coloratum in Western Australia

1996 ◽  
Vol 183 (2) ◽  
pp. 279-290 ◽  
Author(s):  
Khaled A. El-Tarabily ◽  
Giles E. St. J. Hardy ◽  
Krishnapillai Sivasithamparam ◽  
Ipek D. Kurtb�ke
1997 ◽  
Vol 37 (2) ◽  
pp. 265 ◽  
Author(s):  
K. A. El-Tarabily ◽  
G. E. St J. Hardy ◽  
K. Sivasithamparam ◽  
A. G. McKay

Summary. Glasshouse trials were conducted to examine the effect of lime or gypsum amendments on the development of cavity spot disease of carrots in soil artificially infested with Pythium coloratum. Each amendment was applied to soil from the field at 4000 or 8000 kg/ha. Lime at both application rates significantly (P<0.05) reduced the incidence of the disease. In contrast, both gypsum treatments had no effect on the incidence of cavity spot disease. There was no significant (P>0.05) difference in calcium concentration between carrot roots grown in unamended, lime- or gypsum-amended soil with or without the pathogen. Calcium did not appear to play a direct role in the reduction of cavity spot disease. Under the controlled conditions of this glasshouse trial, reduction in the incidence of cavity spot appeared to be related to the increase in soil pH associated with the application of lime. Field trials at the site of soil collection will confirm whether this mechanism is related to field reduction of the disease following liming.


1996 ◽  
Vol 45 (4) ◽  
pp. 727-735 ◽  
Author(s):  
K. A. EL‐TARABILY ◽  
G. E. ST. J. HARDY ◽  
K. SIVASITHAMPARAM

1997 ◽  
Vol 45 (4) ◽  
pp. 727 ◽  
Author(s):  
A. El-Tarabily ◽  
Giles E. St J. Hardy ◽  
Krishnapillai Sivasithamparam

Three experiments were conducted with Pythium coloratum Vaartaja, a causal agent of cavity spot disease of carrots in Western Australia, to study the relationships between host age, time of infection and development of cavity spot lesions. Pythium coloratum was isolated frequently from 3-6-week-old asymptomatic roots of carrots grown in soils infested naturally or artificially with the pathogen. Carrots grown in containers of soil artificially infested with P. coloratum, but not those in naturally infested field soil, developed cavity spot lesions after 6 weeks. Early infection of carrot seedlings at or before 3 weeks by P. coloratum in artificially infested soils followed by their transfer to pathogen-free soil was sufficient to cause cavity spot disease at the time of harvest (16 weeks). The disease levels in this treatment were not different from those transferred to P. coloratum-infested soil. There was no significant (P > 0.05) association between carrot age and the ability of P. coloratum to infect the roots and to cause cavity spot lesions at harvest.


1997 ◽  
Vol 137 (3) ◽  
pp. 495-507 ◽  
Author(s):  
KHALED A. EL-TARABILY ◽  
GILES E. ST. J. HARDY ◽  
KRISHNAPILLAI SIVASITHAMPARAM ◽  
ASSEM M. HUSSEIN ◽  
D. IPEK KURTBOKE

2019 ◽  
Vol 26 (1) ◽  
pp. 1
Author(s):  
Suriani Rauf ◽  
Manjilala Manjilala ◽  
Elvi Kusuma

The behavior of people who less consume vegetables and fruit can have a negative impact on health. The lack of appetite for vegetable consumption by the society made the researchers interested in making a combination of vegetables, namely carrots with local foods, namely Baroncong.This research aims to determine the acceptability of local baroncong snacks with the addition of carrots.This research is a pre-experimental study. The panelists from this study consisted of 30 Nutrition Department Students from Health Polytechnic Ministry of Health Makassar. Assessment based on taste aspects, color of aroma and texture of baroncong products with the addition of carrots 50%, 75%, 100% with the criteria of very like, like, dislike and very dislike.The results showed that the acceptability of baroncong with the addition of carrots in terms of taste was a concentration of 75%, which was very much as much as 46.7% and liked as much as 50%, the color aspect was 50% concentration consisting of 36.7% likes and likes as much as 53.3%, the aroma aspectis a concentration of 50% which consists of very much as much as 33.3% and likes as much as 63.3%, in terms of aspects of texture are concentrations of 50% and 75%, each of which consists of as much as 23.3% and likes as much as 63, 3%. Based on these data, Baroncong with the addition of carrots received is a concentration of 75%.


Author(s):  
Araújo Thaís Jaciane ◽  
Santos Newton Carlos ◽  
Barros Sâmela Leal ◽  
Melo Mylena Olga Pessoa ◽  
Nascimento Amanda Priscila Silva

Planta ◽  
1980 ◽  
Vol 149 (3) ◽  
pp. 283-287 ◽  
Author(s):  
Wolfgang No� ◽  
Christian Langebartels ◽  
Hanns Ulrich Seitz

ChemInform ◽  
2006 ◽  
Vol 37 (42) ◽  
Author(s):  
Nicolas Blanchard ◽  
Pierre van de Weghe

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