The effect of certain nitre-herbicides on the growth of some soil-inhabiting fungi

El-Khadem, M.; Nagib, M.M.; Tewfik, M.S.

doi:10.1016/s0044-4057(73)80101-7

Cited by 3 publications

(3 citation statements)

References 6 publications

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“…Herbicides have been shown to increase or decrease some plant diseases, especially those caused by soilborne pathogens (Katan & Eshel, 1973;y\ltrnan & Campbell, 1977;Papavizas & Uwis, 1979). The change in disease severity could be related to the direct effect of the herbicide in question on the microorganisms iliemseJves (Rodriguez-Kabana et al, 1966, i969, 1970Chopra et al, 1970;El-Khadem -' .' al., 1973), a change in the plam resistance 'i a given pathogen (Altman, 1972;Neubauer -Avizohar-Her&henson, 1973), or other t'i:ects related to the general microflora (Katan & Hshel, 1974).…”

Section: Introductionmentioning

confidence: 99%

Effect of the herbicides EPTC and linuron on cotton diseases caused by Rhizoctonia solani and Fusarium oxysporum f. sp. vasinfectum

El-Khadem¹,

Papavizas²

1984

Plant Pathology

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The herbicides EPTC and linuron applied to soil in the field at three different concentrations X2X, 1X, and 2X of recommended dose) decreased post‐emergence, but not pre‐emergence daraping‐off in cotton incited by Rhizoctonia solani. Both herbicides at the two high concentrations significantly reduced wilt incited by Fusarium oxysporum f. sp. vasinfectum. Both herbicides reduced germination of chlamydospores of Fusarium in natural soil, but not in steamed soil. The 2X concentration of EPTC and linuron reduced the saprophytic activity of R. solani in soil. The effects of EPTC and linuron on post‐emergence damping‐off and wilt were attributed Ic their ability to suppress the saprophytic ability of R. solani and chlamydospore germinability ofFusarium in soil, respectively.

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Section: Introductionmentioning

confidence: 99%

Effect of the herbicides EPTC and linuron on cotton diseases caused by Rhizoctonia solani and Fusarium oxysporum f. sp. vasinfectum

El-Khadem¹,

Papavizas²

1984

Plant Pathology

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“…Of all fungi studied to date, A. euteicbes is the most sensitive to dinitroaniline herbicides. The mycelial growth of most plant pathogens is not affected significantly by dinitroaniline herbicides at field rates of application (6,7,14,20,23,26). Dinitroaniline herbicides have been reported to alter the resistance of some crops to plant diseases.…”

Section: Introductionmentioning

confidence: 99%

Mechanism for the Suppression of pea (Pisum sativum) Root Rot by Dinitroaniline Herbicides

Teasdale¹,

Harvey²,

Hagedorn

1979

Weed sci.

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Pea (Pisum sativumL. ‘Elf’) root rot suppression by dinitroaniline herbicides could not be explained by a direct effect on the host. Pre-incubation of pea roots with 0.1 ppmw of oryzalin (3,5-dinitro-N4,N4-dipropylsulfanilamide) or trifluralin (α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine) in solution culture did not alter their resistance to root rot. Furthermore, 0.1 ppmw of oryzalin or trifluralin did not alter the exudation of electrolytes or α-amino compounds from pea roots. Most of the dinitroaniline herbicides significantly inhibited mycelial radial growth of pathogen,Aphanomyces euteichesDrechs., at 1.0 ppmw and inhibited asexual spore production at 0.1 to 1.0 ppmw. Dinitramine (N4,N4-diethyl-α,α,α-trifluoro-3,5-dinitrotoluene-2,4-diamine), fluchloralin [N-(2-chloroethyl)-2,6-dinitro-N-propyl-4-(trifluoromethyl)aniline], and oryzalin inhibitedA. euteichesmycelial growth and asexual reproduction more effectively than the other dinitroaniline herbicides studied. The production of motile zoospores, the infecting propagule of the pathogen, was the most sensitive stage in the life cycle and was completely inhibited by 0.01 ppmw of all dinitroaniline herbicides tested. Since this concentration is below that estimated in the soil solution at registered rates of application, inhibition of motile zoospore production is sufficient to explain root rot suppression. Inhibition of pathogen motility resulted in a 2-week delay in the infection of pea roots. This delay allowed sufficient additional plant growth that the peas could better withstand the effects of subsequent disease development.

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“…The change in fungal disease severity could be related to the direct effect of the herbicide in question on the microorganisms themselves, a change in the plant resistance to a given pathogen, or other effects related to the general microflora 1,2,3,4,5,8,10,11,12,13,14,15 The present communication is intended to report the effect of three herbicides extensively used to control weeds on the development of Rhizoctonia disease in cotton.…”

Section: Introductionmentioning

confidence: 99%

Effect of the herbicides trifluralin, dinitramine and fluometuron on rhizoctonia disease in cotton

1979

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SUMMARYThe effect of three different concentrations (half, equal and twice of the recommended dose) of three herbicides (trifluralin, dinitramine and fluometuron) usually used to control cotton weeds on the development of Rhizoctonia disease in cotton was studied. Trifluralin and dinitramine at the lower concentrations increased pre-and/or post-emergence damping off. Both herbicides at these concentrations increased the saprophytic activity of the fungus, while they did not affect the susceptibility of the cotton plants. Fluometuron at the highest concentration used was highly phytotoxic and increased the post-emergence damping off. This chemical at the recommended dose caused a drastic reduction in the pre-and post-emergence damping off caused by R. solani. Flnometuron at this concentration decreased both the susceptibility of the host plants and the saprophytic activity of the fungus.

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The effect of certain nitre-herbicides on the growth of some soil-inhabiting fungi

Cited by 3 publications

References 6 publications

Effect of the herbicides EPTC and linuron on cotton diseases caused by Rhizoctonia solani and Fusarium oxysporum f. sp. vasinfectum

Effect of the herbicides EPTC and linuron on cotton diseases caused by Rhizoctonia solani and Fusarium oxysporum f. sp. vasinfectum

Mechanism for the Suppression of pea (Pisum sativum) Root Rot by Dinitroaniline Herbicides

Effect of the herbicides trifluralin, dinitramine and fluometuron on rhizoctonia disease in cotton

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