Allelopathy and microclimatic modification of intercropping with marigold on tomato early blight disease development

Gómez-Rodríguez, Olga; Zavaleta-Mejía, Emma; González-Hernández, Víctor A.; Livera-Muñoz, Manuel; Cárdenas-Soriano, Elizabeth

doi:10.1016/s0378-4290(03)00053-4

Cited by 93 publications

(64 citation statements)

References 9 publications

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“…Marigold (Tagetes erecta) also has allelopathic effects on the germination of Alternaria solani conidia. This effect is due to the presence of volatile thiophenes with biocidal properties in the marigold leaves (Gomez-Rodriguez et al 2003). In the same botanical family, Zinnia spp.…”

Section: Direct Antibiotic Effects During Plant Growthmentioning

confidence: 99%

“…For instance, intercropping marigold (T. erecta) with tomato (L. esculentum) reduced the length of the period with more than 95% relative humidity, creating adverse conditions for conidial development of A. solani (the fungal pathogen that causes early blight disease in tomato) (Gomez-Rodriguez et al 2003).…”

Section: Instances Where Psd Negatively Affects Natural Enemy Populatmentioning

confidence: 99%

“…For instance, reductions in conidial density of A. solani on tomato due to intercropping with marigold (T. erecta: see "Section 3.2" above) or pigweed (Amaranthus hypochondriacus) were partly attributed to the effect of a physical barrier on the dissemination of conidia (Gomez-Rodriguez et al 2003).…”

Section: Barrier Effects Against Pests and Pathogens At The Field Levelmentioning

confidence: 99%

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Plant species diversity for sustainable management of crop pests and diseases in agroecosystems: a review

Ratnadass

Fernandes

Avelino

et al. 2011

Agron. Sustain. Dev.

577

329

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Farmers are facing serious plant protection issues and phytosanitary risks, in particular in the tropics. Such issues are food insecurity, lower income in traditional lowinput agroecosystems, adverse effects of pesticide use on human health and on the environment in intensive systems and export restrictions due to strict regulations on quarantine pests and limits on pesticide residues. To provide more and better food to populations in both the southern and northern hemispheres in a sustainable manner, there is a need for a drastic reduction in pesticide use while keeping crop pest and disease damage under control. This can be achieved by breaking with industrial agriculture and using an agroecological approach, whose main pillar is the conservation or introduction of plant diversity in agroecosystems. Earlier literature suggest that increasing vegetational biodiversity in agroecosystems can reduce the impact of pests and diseases by the following mechanisms: (1) resource dilution and stimulo-deterrent diversion, (2) disruption of the spatial cycle, (3) disruption of the temporal cycle, (4) allelopathy effects, (5) general and specific soil suppressiveness, (6) crop physiological resistance, (7) conservation of natural enemies and facilitation of their action against aerial pests and (8) direct and indirect architectural/ physical effects. Here we review the reported examples of such effects on a broad range of pathogens and pests, e.g. insects, mites, myriapods, nematodes, parasitic weeds, fungi, bacteria and viruses across different cropping systems. Our review confirms that it is not necessarily true that vegetational diversification reduces the incidence of pests and diseases. The ability of some pests and pathogens to use a wide range of plants as alternative hosts/reservoirs is the main limitation to the suppressive role of this strategy, but all other pathways identified for the control of pests and disease based on plant species diversity (PSD) also have certain limitations. Improving our understanding of the mechanisms involved should enable us to explain how, where and when exceptions to the above principle are likely to occur, with a view to developing sustainable agroecosystems based on enhanced ecological processes of pest and disease control by optimized vegetational diversification.

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Section: Direct Antibiotic Effects During Plant Growthmentioning

confidence: 99%

Section: Instances Where Psd Negatively Affects Natural Enemy Populatmentioning

confidence: 99%

Section: Barrier Effects Against Pests and Pathogens At The Field Levelmentioning

confidence: 99%

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Plant species diversity for sustainable management of crop pests and diseases in agroecosystems: a review

Ratnadass

Fernandes

Avelino

et al. 2011

Agron. Sustain. Dev.

577

329

View full text Add to dashboard Cite

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“…Comparing to sole crops, intercrops are able to provide many benefits. It was found that intercropping may increase yields (Zhang et al 2011), income (Yildirim andGuvenc 2005, Singh et al 2013), availability of plant-nutrients (Betencourt et al 2012), reduce the occurrence of diseases (Gomez-Rodriguez et al 2003), suppress weeds (Sharma and Banik 2013), and decrease the demands for fertilization and use of pesticides (Carruthers et al 2000). It can be a helpful tool for soil remediation (Sun et al 2011) and reduction of wind erosion (Chen et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Intercropped red beet and radish with green bean affected microbial communities and nodulation by indigenous rhizobia

Ugrinović¹,

Mijatovic²,

Zdravković³

et al. 2014

AFSci

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The impact of intercropping green bean (Phaseolus vulgaris L.) with red beet (Beta vulgaris L. var. rubra) and radish (Raphanus sativus L.), two non-legume plants, on the plants' yields, as well as the effect on occurrence and enumeration of microorganisms in the rhizosphere was studied. The intercrop efficacy evaluation, using Land equivalent ratio, revealed values above 1.0 for all intercropped treatments. Diversity of rhizobia from green bean nodules under different intercropping and fertilizing conditions was observed. On the basis of morphological and biochemical characteristics, 67 out of 158 isolates from green bean roots were selected as rhizobia (42.4%), confirmed by detection of 780 bp nifH gene fragments in nifH-PCR, and then clustered in 27 phenotype patterns. Production of exopolysaccharide succinoglycan was observed in 23 rhizobial isolates, while 6 were detected to solubilize tricalcium phosphate. Screening of genetic diversity using (GTG) 5 -PCR fingerprinting showed presence of six different patterns on the 92% similarity level.

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“…Previous studies showed that the relative humidity, which played vital roles in disease injuries of crops, was found to present downtrend and reducing the number of hours per day with relative humidity ≥92% in intercropping [3][4]. And the intercropping can increase the amount of light intercepted of crops in unit planting area so that improve the crop dry matter production, yield and radiation use efficiency [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Intercropping of Maize and Soybean on Microclimate

Lei

Fan

et al. 2012

Computer and Computing Technologies in Agriculture V

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Abstract. Intercropping induces the diseases decreasing, and yield increasing, may partly due to the improvement of microclimate in fields. In order to understand the mechanism and efficiency of resource utilization in intercropping of maize (Zea mays) and soybean (Glycine max), a field experiment was conducted as factorial on the bases of randomized complete block design of three patterns with three replications. Three cropping patterns were maize monocropping (A), 2 rows maize and 2 rows soybean intercropping (C) and 2 rows maize and 4 rows soybean intercropping (D). Our studies showed that compared with monocropping, the temperature in intercropping was a little higher in the daytime, but in the nighttime, the contrary results were observed; the relative humidity in intercropping was lower in the daytime, but in the nighttime, the contrary results were observed; the light intensity in intercropping was markedly higher than that in monocropping. The yield components of maize in intercropping, including thousand kernel weight, yield per plant and leaf area were increased than that in monocropping. These results imply that microclimate variation of intercropping probably play important role to maize yield increasing.

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Allelopathy and microclimatic modification of intercropping with marigold on tomato early blight disease development

Cited by 93 publications

References 9 publications

Plant species diversity for sustainable management of crop pests and diseases in agroecosystems: a review

Plant species diversity for sustainable management of crop pests and diseases in agroecosystems: a review

Intercropped red beet and radish with green bean affected microbial communities and nodulation by indigenous rhizobia

The Effect of Intercropping of Maize and Soybean on Microclimate

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