Penetration and Infection Processes of Alternaria brassicicola on Cauliflower Leaf and Alternaria brassicae on Mustard Leaf: A Histopathological Study

2014 ◽  
Vol 13 (2) ◽  
pp. 100-111 ◽  
Author(s):  
Pratibha Sharma ◽  
Swati Deep ◽  
Dinesh Singh Bhati ◽  
Manika Sharma ◽  
P. Chowdappa
Keyword(s):  
Alternaria Brassicicola ◽  
Histopathological Study ◽  
Alternaria Brassicae ◽  
Infection Processes

scholarly journals Levantamento da intensidade da alternariose e da podridão negra em cultivos orgânicos de brássicas em Pernambuco e Santa Catarina

2006 ◽  
Vol 24 (4) ◽  
pp. 464-469 ◽  
Author(s):  
Luiz A M Peruch ◽  
Sami J Michereff ◽  
Issac B Araújo
Keyword(s):  
Xanthomonas Campestris ◽  
Alternaria Brassicicola ◽  
Alternaria Brassicae ◽  
Santa Catarina ◽  
Xanthomonas Campestris Pv Campestris

O objetivo deste trabalho foi avaliar a intensidade da alternariose, causada por Alternaria brassicicola e/ou Alternaria brassicae, e da podridão negra, causada por Xanthomonas campestris pv. campestris, em cultivos orgânicos de brássicas em Pernambuco e Santa Catarina. Os levantamentos foram realizados no período de novembro de 2001 a fevereiro de 2002, num total de 103 cultivos orgânicos de várias espécies de brássicas. Foram registradas elevadas prevalências das doenças nos estados, com exceção em couve-chinesa em Santa Catarina. A prevalência da alternariose foi 100% nos cultivos de brócolis em Pernambuco, bem como em couve-flor nos dois estados, enquanto a podridão negra atingiu esse nível nos cultivos de brócolis e couve-flor em Santa Catarina. Na média das diferentes espécies de brássicas, as doenças foram mais prevalentes em Pernambuco que Santa Catarina. Entretanto, as médias de severidade de cada doença no conjunto das brássicas não foram diferentes entre os estados, embora as condições climáticas tenham sido nitidamente distintas. A severidade da alternariose variou entre as espécies de brássicas somente em Pernambuco, com a menor severidade registrada em couve-manteiga. Em relação à podridão negra, apenas em Santa Catarina houve diferença na severidade entre as brássicas, sendo registrados os menores níveis em couve-chinesa. Não foram constatadas correlações significativas entre os níveis de severidade da alternariose e da podridão negra, bem como da severidade destas com o número total de plantas e a idade das plantas nos cultivos.

Incidence of Alternaria brassicicola (Schw.) Wiltsh. on Brassica oleracea seeds

1992 ◽  
Vol 32 (4) ◽  
pp. 535 ◽  
Author(s):  
A Sivapalan ◽  
JW Browning
Keyword(s):  
Brassica Oleracea ◽  
Primary Source ◽  
Alternaria Brassicicola ◽  
Alternaria Brassicae ◽  
Brassica Crops

Samples of Brassica oleracea seed from Victoria, were tested for the presence of seed-borne Alternaria brassicicola and Alternaria brassicae. A. brassicicola was detected in 26 of 44 samples tested but A. brassicae was not detected in any. Between 24 and 37% of seed was infected, with 4-8% of infection found in the embryo tissues. Inoculation of seed with A. brassicicola resulted in loss of vigour in germinated seedlings, followed by death. The fungus retained its viability and pathogenicity on seed stored for up to 12 months. This investigation indicates that a high proportion of commercially available brassica seed are contaminated with A. brassicicola and may therefore be a primary source of disease for brassica crops in Australia.

scholarly journals Efficacy of Amistar in Controlling Alternaria Blight and Yield of Mustard Variety Rai-5

2019 ◽  
Vol 11 (1-2) ◽  
pp. 191-197
Author(s):  
I Hossain ◽  
MA Akter ◽  
MB Anwar
Keyword(s):  
Natural Resources ◽  
Leaf Area ◽  
Seed Yield ◽  
Marked Effect ◽  
Alternaria Brassicicola ◽  
Alternaria Brassicae ◽  
Alternaria Blight ◽  
Leaf Infection

The effect of Amistar in controlling Alternaria blight of mustard was investigated and the selected mustard variety Rai- 5 was used. Amistar @ 0.05% (1 spray), 0.05% (2 spray), 0.05% (3 spray), 0.1% (1 spray), 0.1% (2 spray) and 0.1% (3 spray) were sprayed at 14 days interval beginning from 40 days after sowing (DAS). Amistar resulted significant reduction of the disease Alternaria blight (Alternaria brassicae and Alternaria brassicicola) severity and increased seed yield. Out of the doses of Amistar used, 0.1% (3 spray) showed marked effect in reducing the disease over control in terms of reduction of % Alternaria blight incidence, % leaf infection and % leaf area diseased up to 90.72%, 90.42% and 98.17%, respectively as well as reduction of % siliqua infection and % area of siliqua diseased up to 96.17% and 98.80%, respectively and thus increased seed yield up to 56.47% over control. J. Environ. Sci. & Natural Resources, 11(1-2): 191-197 2018

Application of 2-Substituted Ethyl Isothiocyanates and 2-Aminothiols in the Synthesis of the Analogs of Indole Phytoalexin Camalexin

1999 ◽  
Vol 64 (9) ◽  
pp. 1448-1456 ◽  
Author(s):  
Milan Dzurilla ◽  
Martin Ružinský ◽  
Peter Kutschy ◽  
Jalpa P. Tewari ◽  
Vladimír Kováčik
Keyword(s):  
Antifungal Activity ◽  
Boron Trifluoride ◽  
Boron Trifluoride Etherate ◽  
Alternaria Brassicicola ◽  
Magnesium Bromide ◽  
Alternaria Brassicae ◽  
Analogous Reaction ◽  
Cyclocondensation Reaction

Treatment of (indol-1-yl)magnesium bromide or iodide with 2-bromoethyl isothiocyanate afforded 1-(4,5-dihydrothiazol-2-yl)indole (6). Analogous reaction with 2,2-dimethoxyethyl isothiocyanate led to corresponding 1-thiocarbamoylindole derivative (7), which was cyclized to 1-(5-methoxy-4,5-dihydrothiazol-2-yl)indole (8) by treatment with boron trifluoride etherate. New analogs of camalexin, namely 4',5'-dihydrocamalexin (12) and benzocamalexin (14) were prepared by cyclocondensation reaction of 1-(tert-butoxycarbonyl)indole-3-carbaldehyde with cysteamine and 2-aminobenzenethiol. Antifungal activity of the prepared compounds was studied, using the fungi Alternaria brassicae and Alternaria brassicicola.

Synthesis and Antifungal Activity of New Indolylthiazinone Derivatives

1998 ◽  
Vol 63 (1) ◽  
pp. 94-102 ◽  
Author(s):  
Milan Dzurilla ◽  
Peter Kutschy ◽  
Jalpa P. Tewari ◽  
Martin Ružinský ◽  
Stanislav Šenvický ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Intramolecular Cyclization ◽  
Boron Trifluoride ◽  
Alternaria Brassicicola ◽  
Alternaria Brassicae

New 6-(indol-3-yl)-5,6-dihydro-4H-1,3-thiazin-4-one derivatives were prepared by boron trifluoride catalyzed intramolecular cyclization of N'-substituted N-[3-(indol-3-yl)propenoyl]thioureas and by the reaction of 3-(indol-3-yl)propenoyl isothiocyanate with sodium hydrogensulfide. Antifungal activity of the prepared compounds was studied using the fungi Alternaria brassicae and Alternaria brassicicola.

scholarly journals Distribution and pathogenic peculiarities of fungi of the Alternaria genus on vegetable crops in Lithuania

2017 ◽  
Vol 38 (SI 2 - 6th Conf EFPP 2002) ◽  
pp. 395-398
Author(s):  
A. Shidlauskienė ◽  
E. Survilienė
Keyword(s):  
Alternaria Solani ◽  
Alternaria Brassicicola ◽  
Alternaria Brassicae ◽  
Vegetable Crops ◽  
Plant Cultivation ◽  
Antagonistic Microorganisms ◽  
Alternaria Dauci ◽  
Alternaria Species ◽  
Streptomyces Griseoviridis ◽  
Plant Activator

In 1999–2001 the investigation of Alternaria species on vegetable crops: cabbage, cucumber, tomato and carrot was carried out and fungi species were isolated from vegetables and substrata used for plant cultivation. Isolated micromycetes: Alternaria alternata, Alternaria tenuissima, Alternaria brassicae, Alternaria brassicicola, Alternaria cucurbitae, Alternaria dauci, Alternaria radicina and Alternaria solani differed in pathogenic peculiarities, frequency of occurrence and their various reaction to fungicides (a.s. azoxystrobin, dichlofluanid, Cooper hydroxide, mancozeb, propamocarb hydrochloride), plant activator Bion (benzothadiazole) and antagonistic microorganisms (Trichoderma harzianum, Streptomyces griseoviridis).

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