Effect of Herbicides on Plant Diseases

Altman, and J; Campbell, Carlton L.

doi:10.1146/annurev.py.15.090177.002045

Cited by 163 publications

(81 citation statements)

References 10 publications

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“…Interestingly, dicamba in vitro, inhibited the development of R. cerealis the least, while under field conditions it was most effective. Much more information on the effect of herbicides on pathogens can be found for R. solani than for R. cerealis (Altman and Campbell 1977;Lévesque and Rahe 1992). Unauthenticated Download Date | 5/9/18 7:31 AM Many authors report on herbicides enhancing the development of soil microorganisms (Altman and Rovira 1989).…”

Section: Discussionmentioning

confidence: 99%

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The Role of the Preceding Crop and Weed Control in the Transmission of Rhizoctonia Cerealis and R. Solani to Winter Cereals

Lemańczyk¹

2012

Journal of Plant Protection Research

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Abstract:Winter cereals (wheat, triticale, rye, barley) grown in experimental fields were assessed for sharp eyespot. Preceding crops (spring cereals and fallow) and weed control (herbicides application, no control) were taken into account. The health status evaluation was carried out at the stem elongation phase and at the milk maturity stage. The macroscopic estimation was accompanied by the analysis of fungal species identified on stem bases and roots, which showed various disease symptoms. The analysis of fungal species from the genus Rhizoctonia were especially noted. Mycological analysis of roots was carried out at the seedling growth and stem elongation phase, and stem bases at the seedling growth and milk maturity stage. Infection caused by Rhizoctonia spp. was confirmed by polymeraze chain reaction (PCR) assay. The highest infection was noted on wheat followed by triticale, rye and barley.Occurrence of sharp eyespot depended more on weed control than on what the preceding crop had been. At the milk maturity stage, lower severity of sharp eyespot of triticale, rye and barley was noted on plots not treated with herbicides, and on wheat with herbicide application. The research showed a significant effect of the preceding crop only on the health status of wheat. At the milk maturity stage, the highest infection was noted after spring triticale and the lowest after oats. Stems of cereals with sharp eyespot symptoms and healthy stems were settled mainly by Rhizoctonia cerealis (wheat -25.6%, triticale -12.0%, rye -22.2%, barley -11.3%), rarely by R. solani (respectively 6.0, 4.0, 2.9 and 1.8%). Rhizoctonia solani was isolated more often from roots with true eyespot and Fusarium foot rot symptoms. It may suggest that R. cerealis was the main causal agent of sharp eyespot on all tested cereals. The preceding crop did not affect the composition of Rhizoctonia species.

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Section: Discussionmentioning

confidence: 99%

“…To limit the weed infestation, the application of herbicides which are not neutral to plant pathogens is commonly used. Herbicides have either increased or decreased plant diseases (Altman and Campbell 1977;Sanyal and Shrestha 2008;Velini et al 2010).…”

Section: Introductionmentioning

confidence: 99%

The Role of the Preceding Crop and Weed Control in the Transmission of Rhizoctonia Cerealis and R. Solani to Winter Cereals

Lemańczyk¹

2012

Journal of Plant Protection Research

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“…While a number of plant diseases are reported to occur with increased incidence and severity, after the application of herbicides (Altman and Campbell, 1977;Altman and Rovira, 1989;Bollen, 1993;Sanogo et al, 2000), other diseases have shown decreases or no significant changes (Dann et al, 1999;Dissanayake et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

BENTAZON-MCPA EFFECT ON Fusarium oxysporum ROOT ROT ON Trifolium pratense IN GREENHOUSE CONDITIONS

Ceballos

Cofre

Quiróz

et al. 2009

R.C. Suelo Nutr. Veg.

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Herbicide and Fusarium effect on red clover root rot, Ceballos et al. 142 BENTAZON-MCPA EFFECT ON ABSTRACTIn Chile, the main factor in red clover (Trifolium pretense L.) stand decline is fusariumroot rot, which results in a reduction in yield. Fusarium oxysporum (Schlect.) is the most prevalent pathogen recovered from diseased red clover roots plants. Agronomical management of red clover includes application of broadleaf herbicides such as MCPA and bentazon. This study was conducted to evaluate the effects of bentazon and bentazon/MCPA mixture on phytotoxicity and root rot as caused by F. oxysporum on red clover, under greenhouse conditions. In addition, in vitro mycelial growth and conidial germination of F. oxysporum was studied. A reduction of 40% in crown diameter and 57% shoot dry weight was observed 30 days after treatment with a high rate of bentazon/MCPA and F. oxysporum inoculum. The bentazon -F. oxysporum interaction reduced root dry weight by 57% at 1X rate and 42% with 2X rate at 20 and 30 of evaluation. Bentazon caused a significant increase in phytotoxicity at the high rate and the mixture bentazon/MCPA increased root rot severity and phytotoxicity at the high rate. The conidial germination and mycelial growth were significantly reduced by bentazon/MCPA. These results suggest that red clover growth and persistence could be adversely affected by F. oxysporum after bentazon and bentazon/MCPA application.

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“…Reviews of herbicide effects on plant pathogens (Altman andCampbell 1977: Katan andEshel 1973) A strip-plot factorial design, with 3 x 12-m, strips of raised or traditional seedbeds was used (Petersen 1976). Raised beds were included to determine if improved root-zone drainage influenced disease incidence.…”

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confidence: 99%