Fungicidal activity and chemical constitution. Part XXI: The activity of substituted 1, 4-naphthoquinones and quinoline-5, 8-diones against apple powdery mildew

1981 ◽  
Vol 12 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Carolyn S. James ◽  
R. S. Thomas Loeffler ◽  
David Woodcock
Keyword(s):  
Powdery Mildew ◽  
Fungicidal Activity ◽  
Chemical Constitution ◽  
Substituted 1

scholarly journals Synthesis and Bioactivity of Novel Coumarin Derivatives

2011 ◽  
Vol 6 (12) ◽  
pp. 1934578X1100601
Author(s):  
Ai-Ying Guan ◽  
Chang-Ling Liu ◽  
Miao Li, Zhi-Nian Li ◽  
Ming-Xing Zhang ◽  
Hong Zhang
Keyword(s):  
Powdery Mildew ◽  
Fungicidal Activity ◽  
Optimal Structure ◽  
Test Results ◽  
Coumarin Derivatives ◽  
Keto Esters ◽  
Wheat Powdery Mildew ◽  
Grey Mold ◽  
Coumarin 7 ◽  
Methyl Phenyl

A series of coumarin derivatives (6-8) containing ( E)-methyl 2-(methoxyimino)-2-phenylacetate, ( E)-2-(methoxyimino )-N-methyl-2-phenylacetamide and methyl methoxy(phenyl)carbamate were synthesized from substituted resorcinols (1) and substituted β-keto esters (2) as starting material via cyclization and condensation reactions. The test results indicated that ( E)-methyl 2-{2-[(3-hexyl-4-methyl-coumarin-7-yloxy)methyl]phenyl}-2-(methoxyimino)acetate (6f) was the optimal structure with good fungicidal activity against cucumber grey mold (CGM) giving 100% control at 100 mg L−1 concentration, much higher than that of coumoxystrobin. Methyl 2-[(3,4-dimethyl-coumarin -7-yloxy)methyl]phenyl(methoxy)carbamate (8a) was another optimal structure with good fungicidal activity against wheat powdery mildew (WPM) showing 100% control at 50 mg L−1 concentration, at the same level as that of the commercial kresoxim-methyl, and very significantly higher than that of coumoxystrobin (no control against WPM at 400 mg L−1).

FUNGICIDAL ACTIVITY AND CHEMICAL CONSTITUTION.

1958 ◽  
Vol 46 (2) ◽  
pp. 167-177 ◽  
Author(s):  
R. J. W. BYRDE ◽  
D. R. CLIFFORD ◽  
D. WOODCOCK
Keyword(s):  
Fungicidal Activity ◽  
Chemical Constitution

Fungicidal activity and chemical constitution.

1969 ◽  
Vol 64 (1) ◽  
pp. 131-137 ◽  
Author(s):  
D. R. CLIFFORD ◽  
A. C. DEACON ◽  
MARGARET E. HOLGATE
Keyword(s):  
Fungicidal Activity ◽  
Chemical Constitution

Fungicidal activity and chemical constitution. XVIII. The activity of 4-(1-cyclo-, 1-iso- and 1-n-propylalkyl)-2, 6-dinitrophenols against powdery mildews

1971 ◽  
Vol 2 (6) ◽  
pp. 232-237 ◽  
Author(s):  
Diana M. Fieldgate ◽  
Carolyn S. James ◽  
R. J. W. Byrde ◽  
D. R. Clifford ◽  
D. Woodcock
Keyword(s):  
Fungicidal Activity ◽  
Powdery Mildews ◽  
Chemical Constitution

The hydrolysis of sulphur in relation to its fungicidal activity

1930 ◽  
Vol 20 (1) ◽  
pp. 32-44 ◽  
Author(s):  
H. Martin
Keyword(s):  
Powdery Mildew ◽  
Fungicidal Activity ◽  
Soft Soap ◽  
Fungicidal Action ◽  
Hydrolysis Of

1. It is suggested that the fungicidal action of sulphur upon the Erysiphaceae is due primarily to hydrolysis.2. The presence of alkali, which brings about an acceleration of this hydrolysis, should enhance the fungicidal properties of sulphur.3. An explanation is thus afforded of the inhibition of the fungicidal action of sulphur against the hop powdery mildew (Sphaerotheca humuli) by gelatine or saponin solutions when employed as the spreader and of the promotion of fungicidal action in the presence of soft soap and alkali casein solutions.4. Attention is drawn to analogies between the action of sulphur upon the mildew and upon copper.5. Current views relative to the fungicidal action of sulphur are discussed from the standpoint of the hydrolysis hypothesis.

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