Interactions of fungicide-herbicide combinations against plant pathogens and weeds

Kataria, H.R.; Gisi, U.

doi:10.1016/0261-2194(90)90128-t

Cited by 20 publications

(12 citation statements)

References 15 publications

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“…Abbott's method (Levy et al, 1986) was used to quantify interactions between inducers and P. fluorescens or antioxidant chemicals for disease control. The level of interaction (IR) was assessed as the ratio between the observed efficacy of the mixture (E (ob) ) and the expected theoretical efficacy (E (th) ); calculated as E (th) ¼ (a þ b) -(ab/100), where a and b are the values of disease control provided independently by an inducer and the P. fluorescens strain when used alone at the dosages corresponding to those in the combination mixture (Kataria & Gisi, 1990).…”

Section: Observations and Data Analysismentioning

confidence: 99%

“…Soil drenches of 3-aminobutyric acid were reported to induce resistance against Fusarium wilt in tomato and Verticillium wilt in cotton (Cohen, 1996;Li et al, 1996). Induced resistance has also been implicated in the control of Rhizoctonia solani on mung bean hypocotyls by the plant growth regulator ethephon (Arora & Bajaj, 1985) and of R. cerealis on wheat culms with the hormone-type herbicide dicamba (Kataria & Gisi, 1990). Dann & Deverall (1995) found that treatment of unifoliate leaves or seedlings of bean with INA (2,6-dichloroisonicotinic acid) one day before transplanting into infested soil did not control Rhizoctonia and Fusarium stem rots.…”

Section: Introductionmentioning

confidence: 99%

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Efficacy of resistance inducers, free‐radical scavengers and an antagonistic strain of Pseudomonas fluorescens for control of Rhizoctonia solani AG‐4 in bean and cucumber

1997

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Sixteen chemicals from different groups of known resistance inducers were tested as a soil drench in a humosoil : sand mix infested with an isolate of Rhizoctonia solani AG‐4. Among these, 5‐nitrosalicylic acid (2 mM aqueous solution), o‐acetylsalicylic acid (2 mM), 2,6‐dichloroisonicotinic acid (0.25 mM), 2‐aminoisobutyric acid (2 mM) and lichenin (2 mM) controlled pre‐emergence damping‐off and post‐emergence seedling mortality of bean cv. Dufrix, but gave little or weak and variable disease control in cucumber cv. Delikatess. Two‐component mixtures of these five chemicals controlled the disease effectively in bean, mixtures containing 2‐aminoisobutyric acid being the most effective, with seedling stands of up to 94% in infested soil. As none of these five chemicals (≤ 2 mM) reduced mycelial growth of R. solani on PDA plates, induced resistance in seedling tissues is implied in their disease control. Control was augmented in both hosts when any one of the five inducers was applied in a mixture with a cell suspension (1 × 109 cells mL−1) of an antagonistic fluorescent strain of Pseudomonas fluorescens; these mixtures showed additive effects and provided much better disease control in bean than in cucumber. The free‐radical scavengers (antioxidants) ascorbic acid, benzoic acid, gluconic acid lactone and thiourea inhibited R. solani growth in vitro and efficiently controlled both pre‐emergence damping‐off and post‐emergence seedling mortality of bean; ascorbic acid and benzoic acid also offered significant protection in cucumber. However, disease control values were reduced substantially when inducers were applied with antioxidants, because of strong antagonistic interactions in most of these mixtures. Probable mechanisms of disease control by 5‐nitrosalicylic acid, o‐acetylsalicylic acid, 2,6‐dichloroisonicotinic acid, 2‐aminoisobutyric acid and lichenin and their interactions with P. fluorescens and antioxidants are discussed.

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Section: Observations and Data Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficacy of resistance inducers, free‐radical scavengers and an antagonistic strain of Pseudomonas fluorescens for control of Rhizoctonia solani AG‐4 in bean and cucumber

1997

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“…One is a direct effect on the pathogen, while the other way is through the influence on the host plant. Several reviews have described the effects of herbicides on plant-pathiogen interactions Kataria and Gisi, 1990). However, there is lfcttle information on how herbicides influence sclerotial production of R. solani and thus their survival, an important component determining distribution range.…”

Section: Research Rationalementioning

confidence: 99%

“…For instance, fungicide cyproconazole decreased infection by Rhizoctonia cerealis (AG-D) on wheat when used with herbicides, bromoxyniL, dicamba, DNOC (4, 6,-dinitro-o-cresolj, or ioxynil, than when either of the pesticides was used alone (Kataria and Gisi, 1990).…”

Section: Pesticidesmentioning

confidence: 99%

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Effects of herbicides on growth and survival, and influence of latitude on anastomosis group diversity in Rhizoctonia solani

Ramasubramaniam

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Ramasubramaniam, Harikrishnan, "Effects of herbicides on growth and survival, and influence of latitude on anastomosis group diversity in Rhizoctonia solani " (2001 INFORMATION TO USERSThis manuscript has been reproduced from the microfilm master. UMI films the text directly from the original or copy submitted. Thus, some thesis and dissertation copies are in typewriter face, while others may be from any type of computer printer.The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleedthrough, substandard margins, and improper alignment can adversely affect reproduction.In the unlikely event that the author did not send UMI a complete manuscript and there are missing pages, these will be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion.Oversize materials (e.g., maps, drawings, charts) are reproduced by sectioning the original, beginning at the upper left-hand comer and continuing from left to right in equal sections with small overlaps.

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Interactions of Synthetic Herbicides With Plant Disease and Microbial Herbicides

Duke¹,

Wedge²,

Cerdeira³

et al.

NATO Security Through Science Series

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Interactions of fungicide-herbicide combinations against plant pathogens and weeds

Cited by 20 publications

References 15 publications

Efficacy of resistance inducers, free‐radical scavengers and an antagonistic strain of Pseudomonas fluorescens for control of Rhizoctonia solani AG‐4 in bean and cucumber

Efficacy of resistance inducers, free‐radical scavengers and an antagonistic strain of Pseudomonas fluorescens for control of Rhizoctonia solani AG‐4 in bean and cucumber

Effects of herbicides on growth and survival, and influence of latitude on anastomosis group diversity in Rhizoctonia solani

Interactions of Synthetic Herbicides With Plant Disease and Microbial Herbicides

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