Fungicide timing for the control of septoria tritici blotch of wheat

Marroni, M.V.; Viljanen-Rollinson, S.L.H.; Butler, R.C.; Deng, Yun

doi:10.30843/nzpp.2006.59.4550

Cited by 8 publications

(6 citation statements)

References 9 publications

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“…Savannah in 2014. General pathology Results also showed prothioconazole was more effective at 50-100% label than epoxiconazole, which is consistent with Marroni et al (2006) where epoxiconazole was less effective at controlling initial infection. There was a yield advantage with high rates of triazole application, but 25% label rates of epoxiconazole offered no yield advantage compared to the untreated.…”

Section: Figuresupporting

confidence: 76%

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The effect of fungicide dose rate and mixtures on Zymoseptoria tritici in two cultivars of autumn sown wheat

Drummond¹,

Craigie²,

Braithwaite³

et al. 2015

NZPP

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In the 2012-13 and 2013-14 seasons septoria tritici blotch (STB) caused by the fungal pathogen Zymoseptoria tritici was poorly controlled in autumn sown wheat in Canterbury. In 2014-15, a low disease pressure season, three trials were conducted to define the protectant and curative properties of two applications of triazole demethylation inhibitor inhibitor (DMI) and succinate dehydrogenase inhibitor (SDHI) fungicides for the control of STB at growth stage 31 and 39 on two cultivars of autumn sown wheat. The protectant activity of triazole and SDHI fungicides was more effective on the flag leaf than the curative activity on leaf two. The addition of an SDHI to a 75% fixed rate of triazole was more effective at controlling STB infection than triazoles alone. The addition of SDHI fungicides also significantly increased yield. The highest mean yields were achieved with the addition of a third application at GS65.

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Section: Figuresupporting

confidence: 76%

“…This work has mirrored that in the United Kingdom of Fraaije et al (2007). Previously farmers could grow STB susceptible cultivars and protect them with fungicides (Brown 2012), even though more resistant cultivars were available (Marroni et al 2006).…”

Section: Discussionmentioning

confidence: 76%

The effect of fungicide dose rate and mixtures on Zymoseptoria tritici in two cultivars of autumn sown wheat

Drummond¹,

Craigie²,

Braithwaite³

et al. 2015

NZPP

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“…While epoxiconazole suppresses Z. tritici growth it is less effective than some other fungicides. For example, both Marroni et al (2006) and Godwin et al (1994) found epoxiconazole did not inhibit the early stages of a Z. tritici infection as much as azoxystrobin (assuming a sensitive strain of the pathogen).…”

Section: Samplesmentioning

confidence: 98%

Resistance of Zymoseptoria tritici to azoxystrobin and epoxiconazole in the lower North Island of New Zealand

Stewart

Perry²,

Evans³

2014

NZPP

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In response to a suspected fungicide resistance problem in the spring of 2013 23 isolates of Zymoseptoria tritici (also known as Mycosphaerella graminicola) were collected from wheat fields showing symptoms of speckled leaf blotch around the lower North Island EC50 values for the collected isolates and three sensitive isolates against rates of azoxystrobin epoxiconazole and isopyrazam were determined by growth in microplates as measured by light absorbance Furthermore greenhouse inoculations on fungicidesprayed plants were conducted with selected isolates Resistance to azoxystrobin appears widespread as does reduced sensitivity to epoxiconazole Most growers supplying the samples were using epoxiconazole as their standard cereal fungicide but at lower than label rates A combination of conducive weather low fungicide rates resistance to azoxystrobin and reduced sensitivity to epoxiconazole is likely to have contributed to the disease epidemic

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“…Anon., ). The response of wheat to the timing of plant growth regulators (Kettlewell et al , ; Bodson & Durdu, ; Gandee et al , , ; Rajala & Peltonen‐Sainio, ; Hussain & Leitch, ; Wiersma et al , ; Huberman et al , ; Peng et al , ), herbicides (Wilson & Cussans, ; Tottman, ; Martin et al , ; Leaden et al , ; Pageau & Lajeunesse, ; Kong et al , ; Robinson et al , ), insecticides (Carter et al , ; Mann et al , ; Oakley et al , ; Kennedy & Connery, ), fungicides (Nelson & Sutton, ; Cook & Hayward, ; Guy et al , ; Goulds & Fitt, ; Duczek & Jones‐Flory, ; Cook et al , ; Nicolas, ; Wiersma & Motteberg, ; Marroni et al , ; Edwards & Godley, ; Wegulo et al , ) and nitrogen application (Darwinkel, ; Powlson et al , ; Sylvester‐Bradley et al , ; Maidl et al , ; Sticksel et al , , ; Flowers et al , ; Weisz et al , ; Efretuei et al , ) are all commonly interpreted with reference to DGS. Similarly, the responses to other agronomic decisions, such as sowing density, can be interpreted with reference to canopy formation and architecture at particular DGS (Whaley et al , ).…”

Section: Growth Stage Scores Defining Cereal Developmentmentioning

confidence: 99%

Decimal growth stages for precision wheat production in changing environments?

Barber

Carney

Alghabari

et al. 2015

Annals of Applied Biology

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The utility of the Decimal Growth Stage (DGS) scoring system for cereals is reviewed. The DGS is the most widely-used scale in academic and commercial applications due to its comprehensive coverage of cereal developmental stages, the ease of use and definition provided, and adoption by official agencies. The DGS has demonstrable and established value in helping to optimise the timing of agronomic inputs, particularly with regards to plant growth regulators, herbicides, fungicides and soluble nitrogen fertilizers. Additionally the DGS is used to help parametise crop models, and also in understanding the response and adaptation of crops to the environment. The value of the DGS for increasing precision relies on it indicating, to some degree, the various stages in the development of the stem apex and spike. Coincidence of specific growth stage scores with the transition of the apical meristem from a vegetative to a reproductive state, and also with the period of meiosis, is unreliable. Nonetheless, in pot experiments it is shown that the broad period of booting (DGS 41-49) appears adequate for covering the duration when the vulnerability of meiosis to drought and heat stress is exposed. Similarly, the duration of anthesis (61-69) is particularly susceptible to abiotic stresses: initially from a fertility perspective, but increasingly from a mean grain weight perspective as flowering progresses to DGS 69 and then milk development. These associations with DGS can have value at the crop level of organisation: for interpreting environmental effects, and in crop modelling. However, genetic, biochemical, and physiological analysis to develop greater understanding of stress acclimation during the vegetative state, and tolerance at meiosis, does require more precision than DGS can provide. Similarly, individual floret analysis is needed to further understand the genetic basis of stress tolerance during anthesis.publishersversionpreprintPeer reviewe

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Fungicide timing for the control of septoria tritici blotch of wheat

Cited by 8 publications

References 9 publications

The effect of fungicide dose rate and mixtures on <i>Zymoseptoria tritici</i> in two cultivars of autumn sown wheat

The effect of fungicide dose rate and mixtures on <i>Zymoseptoria tritici</i> in two cultivars of autumn sown wheat

Resistance of <i>Zymoseptoria tritici</i> to azoxystrobin and epoxiconazole in the lower North Island of New Zealand

Decimal growth stages for precision wheat production in changing environments?

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