Phosphonic acid: a long‐standing and versatile crop protectant

Dann, E. K.; McLeod, A.

doi:10.1002/ps.6156

Cited by 33 publications

(18 citation statements)

References 90 publications

(158 reference statements)

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“…The dip treatment failed to control base rot of stem tissue in well cured crowns but it prevented infection of their basal leaves. Potentially the inoculum was taken up more effectively in the dried crowns, but potassium phosphonate has been shown to induce defence responses in a range of plant/pathogen systems (Dann and McLeod 2021). Further investigations to determine if a defence response is stimulated by potassium phosphonate application to crowns would be useful.…”

Section: Incubationmentioning

confidence: 99%

Phosphonate applied as a pre-plant dip controls Ceratocystis paradoxa base rot of pineapple planting material

Anderson

Dean

Pegg

2022

Australasian Plant Pathol.

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Base rot, caused by Ceratocystis paradoxa, can be a severe disease of pineapple planting material and can result in poor establishment of plants. Pre-plant dipping of pineapple crowns in potassium phosphonate is used to control Phytophthora cinnamomi root and heart rot and was tested for efficacy against base rot in this study. Dipping crowns in 0.5% potassium phosphonate for 2 min significantly reduced the severity of base rot on inoculated crowns in two trials with ‘MD2’ and ‘73–50’. Fresh crowns had a more marked response to potassium phosphonate than well-cured, dried crowns. In studies with amended media, the growth of C. paradoxa was not inhibited by phosphonate concentrations of up to 100 ppm. Growth was reduced at higher concentrations but phosphonate did not completely inhibit growth of C. paradoxa even at the highest rate of 6000 ppm. Potassium phosphonate failed to control incidental Penicillium funiculosum infection of basal crown tissue.

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Section: Incubationmentioning

confidence: 99%

Phosphonate applied as a pre-plant dip controls Ceratocystis paradoxa base rot of pineapple planting material

Anderson

Dean

Pegg

2022

Australasian Plant Pathol.

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“…Three reviews were related to chemical management of plant pathogens 60–62 . The use of phosphonates (phosphorous acid, phosphonic acid, and phosphite) as fungicides is reviewed 60 .…”

Section: Figurementioning

confidence: 99%

“…Three reviews were related to chemical management of plant pathogens 60–62 . The use of phosphonates (phosphorous acid, phosphonic acid, and phosphite) as fungicides is reviewed 60 . The potential for the use of protein‐based antibiotics ( e.g ., bacteriocins) for management of bacterial phytopathogens is discussed 61 .…”

Section: Figurementioning

confidence: 99%

Success, despite another plague year

Duke¹

2021

Pest Management Science

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“…At present, one of the most effective treatments for both Phytophthora species is potassium phosphite [12][13][14][15], which functions both as an antimicrobial and as an inducer of host defence mechanisms [16][17][18]. While phosphite is relatively effective and has low environmental toxicity, it does not eradicate the pathogens, meaning ongoing treatment is required [14].…”

Section: Introductionmentioning

confidence: 99%

Screening a Natural Product-Inspired Library for Anti-Phytophthora Activities

et al. 2021

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Phytophthora is a genus of microorganisms that cause devastating dieback and root-rot diseases in thousands of plant hosts worldwide. The economic impact of Phytophthora diseases on crops and native ecosystems is estimated to be billions of dollars per annum. These invasive pathogens are extremely difficult to control using existing chemical means, and the effectiveness of the few treatments available is being jeopardized by increasing rates of resistance. There is an urgent need to identify new chemical treatments that are effective against Phytophthora diseases. Natural products have long been regarded as “Nature’s medicine chest”, providing invaluable leads for developing front-line drugs and agrochemical agents. Here, we have screened a natural product-inspired library of 328 chemicals against two key Phytophthora species: Phytophthora cinnamomi and Phytophthora agathidicida. The library was initially screened for inhibition of zoospore germination. From these screens, we identified twenty-one hits that inhibited germination of one or both species. These hits were further tested in mycelial growth inhibition studies to determine their half-maximal inhibitory concentrations (IC50s). Four compounds had IC50 values of approximately 10 µM or less, and our best hit had IC50s of approximately 3 µM against both Phytophthora species tested. Overall, these hits may serve as promising leads for the development of new anti-Phytophthora agrochemicals

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Phosphonic acid: a long‐standing and versatile crop protectant

Cited by 33 publications

References 90 publications

Phosphonate applied as a pre-plant dip controls Ceratocystis paradoxa base rot of pineapple planting material

Phosphonate applied as a pre-plant dip controls Ceratocystis paradoxa base rot of pineapple planting material

Success, despite another plague year

Screening a Natural Product-Inspired Library for Anti-Phytophthora Activities

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