Effect of Temperature, Wetness Duration, and Planting Density on Olive Anthracnose Caused by <i>Colletotrichum</i> spp.

Moral, Juan; Jurado-Bello, José; Sánchez, M. Isabel; Oliveira, Rodrígues de; Trapero, A.

doi:10.1094/phyto-12-11-0343

Cited by 54 publications

(43 citation statements)

References 20 publications

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“…The microclimatic and agronomic conditions of SHD systems are highly conducive to airborne diseases. Thus, the differential resistance of the cultivars to major pests and diseases should also be taken into account when establishing an SHD orchard, especially in areas where Colletotrichum spp., the causal agent of olive anthracnose, is endemic (Moral et al, 2012). In addition, the numerous wounds in the branches caused by the mechanical harvester result in a greater risk of infections from wound-associated pathogens such as Botryosphaeriaceae species and the bacterium Pseudomonas savastanoi pv.…”

Section: Discussionmentioning

confidence: 99%

Cultivar and Tree Density As Key Factors in the Long-Term Performance of Super High-Density Olive Orchards

et al. 2016

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Super high-density (SHD) olive orchards are rapidly expanding since the first plantation was set up in Spain in the 1990s. Because there are no long-term studies characterizing these systems, it is unknown if densities above a certain threshold could trigger competition among fully-grown trees, compromising their development. Over 14 years we have evaluated the performance of the major olive cultivars currently planted in SHD systems (“Arbequina,” Arbequina IRTA-i·18, “Arbosana,” “Fs-17,” and “Koroneiki”) and nine SHD designs ranging from 780 to 2254 trees ha−1 for the cultivar “Arbequina.” Remarkably, the accumulated fruit and oil production of the five cultivars increased linearly over time. Our data indicated the favorable long-term performance of the evaluated cultivars with an average annual oil production of 2.3 t ha−1. Only “Fs-17” did not perform well to the SHD system in our conditions and it yielded about half (1.2 t ha−1) of the other cultivars. In the density trial for “Arbequina,” both fruit and oil accumulated production increased over time as a function of tree density. Thus, the accumulated oil yield ranged from 16.1 t ha−1 for the lowest density (780 trees ha−1) to 29.9 t ha−1 for the highest (2254 trees ha−1). In addition, we note that the accumulated production per surface unit showed a better correlation with the hedgerow length than the tree density. Thus, the current planting designs of SHD olive orchards can be further improved taking this parameter into account. Despite observations that some irregular patterns of crop distribution have arisen, our olive hedgerows are still fully productive after 14 years of planting. This result contradicts previous experiences that showed declines in production 7 or 8 years after planting due to high vigor, shading, and limited ventilation.

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Section: Discussionmentioning

confidence: 99%

Cultivar and Tree Density As Key Factors in the Long-Term Performance of Super High-Density Olive Orchards

et al. 2016

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“…Extensive field surveys in olivegrowing countries where epidemic outbreaks of olive anthracnose occur frequently have revealed that a different Colletotrichum species usually dominates in a particular area, thus suggesting an adaptive potential to different host genetic background and environmental factors Talhinhas et al, 2011). Optimum and cardinal temperatures and the ability to sporulate are among the factors that can influence the fitness of Colletorichum species and their adaptive capability to a particular environment Moral et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Species of the Colletotrichum gloeosporioides and C. boninense complexes associated with olive anthracnose

Schena

Mosca

Cacciola³

et al. 2013

Plant Pathology

110

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The taxonomic status of Colletotrichum gloeosporioides sensu lato (s.l.) associated with olive anthracnose is still undetermined and the pathogenic ability of this species complex is controversial. In the present study, isolates obtained from olive and provisionally identified as C. gloeosporioides s.l. on the basis of morphological and cultural features were reclassified using ITS and TUB2 as DNA barcode markers and referred to seven distinct species, recently separated within C. gloeosporioides (C. aenigma, C. gloeosporioides sensu stricto (s.s.), C. kahawae, C. queenslandicum, C. siamense and C. theobromicola) and C. boninense (C. karstii) species complexes. Furthermore, isolates of C. kahawae were ascribed to the subspecies ciggaro by analysing the GS gene. A single isolate, not in either of these two species complexes, was not identified at the species level. In pathogenicity tests on detached olive drupes some of these species, including C. aenigma, C. kahawae subsp. ciggaro, C. queenslandicum, C. siamense and C. karstii, were shown to be weakly pathogenic. Moreover, they were found very sporadically on olive. In contrast, some isolates of C. gloeosporioides s.s. and isolates of C. theobromicola proved to be virulent on both green and ripening olives. This study gives a better insight into both the aetiology and the epidemiology of olive anthracnose and might have implications for biosecurity and quarantine because C. theobromicola has never been reported in major European olive-producing countries.

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“…Environment is an integral component of disease development without the knowledge of which disease management is very difficult (Ghent et al, 2013). The characterization of favorable environmental conditions for disease development facilitates farmers and researchers for timely management of the disease (Moral et al, 2012). To eliminate unnecessary use of pesticides, precise knowledge of the risk of an epidemic at field level is essential (Dani, 2013).…”

Section: Introductionmentioning

confidence: 99%

Epidemiological Studies of Tomato Leaf Curl Virus Disease Based upon Environmental Variables

Zeshan¹,

Khan²,

Ali³

et al. 2016

IJAB

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Tomato leaf curl virus (TLCV) is an emerging problem in tomato growing areas of Pakistan. Relationship of TLCV disease and environmental conditions were studied on five tomato cultivars. Temperature (maximum and minimum) and relative humidity significantly contributed in the development of TLCV disease during two years (2012 and 2013). The TLCV disease incidence increased with rise in maximum and minimum temperature and decreased with the increase in relative humidity. The contribution of maximum temperature was explained by linear regression which showed 83 to 91% variability in the disease incidence and minimum temperature explained 75 to 85% variability. Relative humidity exerted 78 to 85% contribution in the disease development. The linear regression could not explain the contribution of rainfall and wind speed in disease development. The characterization of favorable environmental conditions for TLCV disease development would contribute towards accurate prediction and timely management of the disease.

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Effect of Temperature, Wetness Duration, and Planting Density on Olive Anthracnose Caused by Colletotrichum spp.

Cited by 54 publications

References 20 publications

Cultivar and Tree Density As Key Factors in the Long-Term Performance of Super High-Density Olive Orchards

Cultivar and Tree Density As Key Factors in the Long-Term Performance of Super High-Density Olive Orchards

Species of the Colletotrichum gloeosporioides and C. boninense complexes associated with olive anthracnose

Epidemiological Studies of Tomato Leaf Curl Virus Disease Based upon Environmental Variables

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