Effects of adjuvants on distribution and rainfastness of captan sprays on apple leaf scars to control European canker

Gaskin, R.E.; Manktelow, D.W.L.; Northcott, Grant L.

doi:10.30843/nzpp.2014.67.5744

Cited by 5 publications

(6 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…European canker, caused by the fungal pathogen N. ditissima , is prevalent in apple orchards in most temperate growing regions of the world including New Zealand (Latorre et al ; Gaskin et al ; Weber ). Current control strategies using chemical fungicides are not fully effective due to the difficulty in protecting the large number and type of wounds (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Current control strategies using chemical fungicides are not fully effective due to the difficulty in protecting the large number and type of wounds (e.g. leaf and picking scars, pruning wounds) that are available for pathogen infection (Ghasemkhani ; Gaskin et al ; Alves and Nunes ; Walter et al ). There have been limited reports of biocontrol agents or commercial biological products effective at controlling this disease (Walter et al ; Walter et al ; Berdeni et al ).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Apple endophyte community is shaped by tissue type, cultivar and site and has members with biocontrol potential againstNeonectria ditissima

2020

View full text Add to dashboard Cite

Aims This research aimed to identify factors influencing endophyte community structure in apple shoots and the bioactivity of cultured representatives against the fungal pathogen Neonectria ditissima. Methods and Results The endophyte community in leaves and stems of the apple cultivars ‘Royal Gala’ and ‘Braeburn’ were analysed by a cultivation‐independent method (PCR‐DGGE) which showed that tissue type, cultivar and site were determinant factors, with the endophyte taxa in ‘Royal Gala’ more variable than that in ‘Braeburn’, with leaf endophyte communities typically differing from stems in both cultivars. Seasonal (spring vs autumn) and regional (Nelson vs Hawke’s Bay) variations were not obvious in woody stems. A collection of 783 bacterial and 87 fungal endophytes were recovered from leaves and stems of ‘Royal Gala’, ‘Braeburn’, ‘Scilate’ and/or ‘Scifresh’ from Nelson (nine sites) and Hawke’s Bay (five sites) in spring and from Nelson (three sites) in autumn. A dual culture plating assay was used to test their ability to inhibit the mycelial growth of N. ditissima. Thirteen bacterial (mean of percent inhibition ≥20%) and 17 fungal isolates were antagonistic towards N. ditissima. These isolates belonged to the bacterial genera Bacillus and Pseudomonas, and fungal genera Chaetomium, Epicoccum, Biscogniauxia, Penicillium, Diaporthe, Phlyctema and two unidentified fungal isolates. Conclusions Endophyte communities in apple shoots were determined by tissue type, cultivar and site. Endophytic bacterial and fungal isolates inhibiting N. ditissima growth in vitro were found. Significance and Impact of the Study These results provided new evidence of factors influencing apple endophyte community in New Zealand. Endophytes with potential to reduce N. ditissima infection were identified, with the potential to be developed into a biocontrol strategy for European canker.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Apple endophyte community is shaped by tissue type, cultivar and site and has members with biocontrol potential againstNeonectria ditissima

2020

View full text Add to dashboard Cite

show abstract

“…After spray application, the retention of captan on the stems and leaves of crops increased by seven times and by three times after rain. 54 DTCs are complexes containing Mn, Zn, and other metal elements. After application, they degrade rapidly when they come into contact with the plant surface, releasing Mn and Zn.…”

Section: Discussionmentioning

confidence: 99%

Foliar application of three dithiocarbamates inhibits the absorption and accumulation of Cd in wheat

Gao

Huang

Liu

et al. 2022

Environ. Sci.: Processes Impacts

View full text Add to dashboard Cite

show abstract

“…This may temporarily lead to a redistribution of captan from leaves to leaf scars especially in the presence of spreader adjuvants. Leaf scars and other rough bark surfaces seem to offer an improved retention of captan as compared to leaf surfaces (Gaskin et al 2014). In the case of MBC fungicides, a reduced sensitivity of N. ditissima has been reported both from Northern Germany (Weber and Palm 2010) and New Zealand (Walter et al 2014), possibly indicating a shift towards resistance.…”

Section: Chemical Control Optionsmentioning

confidence: 99%

Infection biology as the basis of integrated control of apple canker (Neonectria ditissima) in Northern Europe

Weber

Børve

2021

CABI Agric Biosci

View full text Add to dashboard Cite

Background European canker, caused by Neonectria ditissima, is a disease of worldwide importance in apple production, yet knowledge about it is limited, highly regional and sometimes contradictory. This is an obstacle to successful disease management. Key aspects for Northern Europe are reviewed, based on research results from Northern Germany and Norway and on international literature data. Main topics Trunk cankers developing on young trees within the first 1–3 seasons of explanting can often be traced back to latent infections initiated in the nurseries. The most important nursery infection is a lateral canker on the main trunk of ‘knip’ trees, which are the standard tree type in Northern Europe. In strongly affected batches, up to 25% of trees have to be uprooted after the first growing season due to such trunk cankers. The establishment and maintenance of healthy orchards requires clean nursery material, especially in the case of susceptible cultivars. In Northern Germany, infections within commercial orchards most often proceed through wounds caused by fruit picking or leaf fall in autumn, as shown by the appearance of cankers in the following spring and by the high efficacy of fungicide treatments at leaf fall. Ascospores, commonly thought to be relevant for long-distance spread of infections, are not released until the end of leaf fall even in wet autumn seasons in Northern Germany. Therefore, their role in the disease remains unclear. Strong nitrogen-induced vegetative growth favours apple canker. In field trials conducted under conditions of current commercial practices, autumnal sprays with copper hydroxide or copper oxide were consistently more efficacious than copper oxychloride or captan in preventing new infections. Conclusions Restricted fertilisation and other measures to curb excessive vegetative growth during the first few years of an orchard, repeated canker pruning and well-timed treatments with effective fungicides in autumn are essential for IPM of apple canker. Nonetheless, canker remains capable of severely impairing the commercial success of susceptible cultivars in regions with wet climates even if all available measures are taken. This opens up long-term perspectives for the breeding of more resistant cultivars.

show abstract

Effects of adjuvants on distribution and rainfastness of captan sprays on apple leaf scars to control European canker

Cited by 5 publications

References 4 publications

Apple endophyte community is shaped by tissue type, cultivar and site and has members with biocontrol potential againstNeonectria ditissima

Apple endophyte community is shaped by tissue type, cultivar and site and has members with biocontrol potential againstNeonectria ditissima

Foliar application of three dithiocarbamates inhibits the absorption and accumulation of Cd in wheat

Infection biology as the basis of integrated control of apple canker (Neonectria ditissima) in Northern Europe

Contact Info

Product

Resources

About