Olive Landscape Affects Bactrocera oleae Abundance, Movement and Infestation

The economic importance of Bactrocera oleae (Rossi) and the problems associated with insecticides make necessary new management approaches, including deeper biological knowledge and its relationship with landscape structure. Landscape complexity reduces B. oleae abundance in late summer–autumn in areas of high dominance of olive groves, but the effect of landscape structure in spring and in areas less dominated by olive groves has not been studied. It is also unknown whether the insect disperses from olive groves, using other land uses as a refugee in summer. This work evaluates the effect of landscape structure on olive fruit fly abundance and movement in spring and autumn, and infestation in autumn, in central Spain, an area where the olive crop does not dominate the landscape. A cost–distance analysis is used to evaluate the movement of the fly, especially trying to know whether the insects move away from olive groves in summer. The results indicate that B. oleae abundance is consistently lower in complex landscapes with high scrubland area (CAS), patch richness (PR) and Simpson landscape diversity index (SIEI), and low olive grove area (CAO). The cost–distance analysis shows that the fly moves mainly in spring, and amongst olive groves, but there is no evidence that land uses other than olive groves serve as a summer refuge. Olive fly infestation decreased with decreasing CAO and increasing CAS and SIEI, accordingly with the effect of landscape on abundance. Thus, mixing olive groves with other land uses, which are not a source of flies, can help improve control of this important pest.

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Olive Landscape Affects Bactrocera Oleae Abundance, Movement and Damage

10.21203/rs.3.rs-530888/v1 ◽

2021 ◽

Author(s):

Marta Quero Ortega ◽

Natalia Moreno ◽

Cristina E. Fernández ◽

Susana Pascual

Keyword(s):

Landscape Structure ◽

Fruit Fly ◽

Bactrocera Oleae ◽

Olive Fruit Fly ◽

Olive Grove ◽

Olive Fruit ◽

Distance Analysis ◽

Cost Distance ◽

Olive Groves ◽

The Relationship

Abstract The olive fruit fly, Bactrocera oleae (Rossi) (Diptera: Tephritidae), is a key pest of olive groves. Because of its economic importance and problems associated with chemical control, new approaches to reduce the damage caused by this pest and a deeper knowledge of the biology of the insect and the relationship of landscape structure to different biological parameters are needed. B. oleae can fly long distances and its ability to move within the landscape can determine the damage caused to olive groves. This work evaluates the effect of landscape structure on olive fruit fly abundance, movements and damage at three times of year—spring, early autumn and late autumn—in central Spain. This area is less dominated by olive groves than southern Spain, where the relationship between olive grove area and B. oleae abundance is already known. A cost-distance analysis is used to evaluate the landscape effect on the movement of the fly along the crop cycle. The olive grove area is the landscape composition factor with the greatest effect on the parameters studied, with a decrease in B. oleae abundance in a more complex landscape during spring and early autumn. The cost-distance analysis shows that the olive fruit fly moves mainly in spring, and amongst olive groves. There is no evidence that land uses other than olive groves serve as a summer refuge for B.oleae in the studied landscape context. Olive grove area and land use diversity index had significant effects on olive damage in more than one year.

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Assessment of Tuscany Landscape Structure According to the Regional Landscape Plan Partition

Sustainability ◽

10.3390/su13105424 ◽

2021 ◽

Vol 13 (10) ◽

pp. 5424

Author(s):

Martina Venturi ◽

Francesco Piras ◽

Federica Corrieri ◽

Beatrice Fiore ◽

Antonio Santoro ◽

...

Keyword(s):

Landscape Structure ◽

Agricultural Landscapes ◽

Edge Density ◽

Regional Government ◽

Land Uses ◽

Landscape Mosaic ◽

Landscape Complexity ◽

Economic Role ◽

Patch Density ◽

Landscape Units

The landscape is considered a strategic asset by the Tuscan regional government, also for its economic role, meaning that a specific Landscape Plan has been developed, dividing the region into 20 Landscape Units and representing the main planning instrument at the regional level. Following the aims of the Landscape Plan and the guidelines of the European Landscape Convention, it is necessary to develop an adequate assessment of the landscape, evaluating the main typologies and their characteristics. The aim of this research is to carry out an assessment of the landscape diversity in Tuscany based on 20 study areas, analyzing land uses and landscape mosaic structures through the application of landscape metrics: number of land uses, mean patch size (MPS), Hill’s diversity number, edge density (ED), patch density (PD), land use diversity (LUD). The results highlight a correlation between the landscape typologies (forest, agricultural, mixed, periurban) and the complexity of the landscape structure, especially in relation to MPS and PD, while the combination of PD and LUD calculated on the basis of a hexagonal grid allows obtaining landscape complexity maps. Despite the phenomena of reforestation and urban sprawl of recent decades, Tuscany still preserves different landscape typologies characterized by a good level of complexity. This is particularly evident in mixed landscapes, while agricultural landscapes have a larger variability because of different historical land organization forms. The methodology applied in this study provided a large amount of data about land uses and the landscape mosaic structure and complexity and proved to be effective in assessing the landscape structure and in creating a database that can represent a baseline for future monitoring.

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Landscape Simplification Increases Bactrocera Oleae Abundance In Olive Groves: Populations Dynamics In Different Land Uses.

10.21203/rs.3.rs-1068293/v1 ◽

2021 ◽

Author(s):

Daniel Paredes ◽

João Frederico Alves ◽

Sara Mendes ◽

José Miguel Costa ◽

Joana Alves ◽

...

Keyword(s):

Population Dynamics ◽

Pest Control ◽

Landscape Context ◽

Bactrocera Oleae ◽

Land Uses ◽

Olive Fly ◽

Olive Groves ◽

Chemical Products ◽

Seasonal Population ◽

Seasonal Population Dynamics

Abstract Bactrocera oleae is the main pest in olive groves and its management requires a sustainable perspective to reduce the use of chemical products. Landscape context is being considered as an important driver of pest reduction but results on B. oleae show inconsistency to date. Most of landscape-pest control studies focus on the dynamics of the pests within the focal crop, ignoring these dynamics in other land uses. Here we present a study in which we analyze the seasonal population dynamics of the olive pest B. oleae in the most important land uses of a typical olive landscape in Portugal. We found that B. oleae is present in all the land uses and the dynamics are very similar to those in the olive groves. However, the presence of these land uses in the landscape did not display any increase of B.oleae abundance within the olives groves. In contrast, a landscape mainly composed by olive groves increased the abundance of this pest. Importantly, more diverse landscapes surrounding olive groves reduce the abundance of the olive fly. Based on these findings, we can conclude that B. oleae is present in all the land uses of the studied landscape but that this presence does not imply an increase of B. oleae in olive groves. Indeed, other land uses can promote landscape diversification which is a driver of the reduction of B. oleae populations in olive groves. We thus encourage olive stakeholders to increase landscape diversification around their farms by promoting/restoring other crops/habitats.

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A kaolin-based particle film for suppression of the olive fruit fly Bactrocera oleae Gmelin (Dip., Tephritidae) in olive groves

Journal of Applied Entomology ◽

10.1046/j.1439-0418.2003.00803.x ◽

2004 ◽

Vol 128 (1) ◽

pp. 28-31 ◽

Cited By ~ 48

Author(s):

G. Saour ◽

H. Makee

Keyword(s):

Fruit Fly ◽

Bactrocera Oleae ◽

Olive Fruit Fly ◽

Olive Fruit ◽

Olive Groves

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A PCR-based diagnostic assay for detecting DNA of the olive fruit fly, Bactrocera oleae, in the gut of soil-living arthropods

Bulletin of Entomological Research ◽

10.1017/s000748531600050x ◽

2016 ◽

Vol 106 (5) ◽

pp. 695-699 ◽

Cited By ~ 7

Author(s):

M. Rejili ◽

T. Fernandes ◽

A.M. Dinis ◽

J.A. Pereira ◽

P. Baptista ◽

...

Keyword(s):

Biological Control ◽

Dna Sequences ◽

Control Strategies ◽

Olive Tree ◽

Fruit Fly ◽

Bactrocera Oleae ◽

Olive Fruit Fly ◽

Diagnostic Assay ◽

Specific Primers ◽

Olive Groves

AbstractBactrocera oleae (Rossi) (Diptera: Tephritidae) is considered the most devastating pest of the olive tree worldwide. In an effort to develop management and biological control strategies against this pest, new molecular tools are urgently needed. In this study, we present the design of B. oleae-specific primers based on mitochondrial DNA sequences of cytochrome oxidase subunit I (COI) gene. Two pairs of B. oleae-specific primers were successfully designed and named as SBo1-F/SBo1-R and SBo2-F/SBo1-R, being able to amplify 108 and 214 bp COI fragments, respectively. The specificity of designed primers was tested by amplifying DNA from phylogenetically related (i.e. Diptera order) and other non-pest insects living in olive groves from the Mediterranean region. When using these primers on a PCR-based diagnostic assay, B. oleae DNA was detected in the gut content of a soil-living insect, Pterostichus globosus (Fabricius) (Coleoptera: Carabidae). The detection of B. oleae DNA in the guts of arthropods was further optimized by adding bovine serum albumin enhancer to the PCR reaction, in order to get a fast, reproducible and sensitive tool for detecting B. oleae remains in the guts of soil-living arthropods. This molecular tool could be useful for understanding pest–predator relationships and establishing future biological control strategies for this pest.

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RESPONSE OF THE OLIVE FRUIT FLY, Bactrocera oleae ROSSI TO SOME AMMONIUM COMPOUNDS AND CERTAIN FOOD ATTRACTANTS UNDER FIELD CONDITIONS IN OLIVE ORCHARDS

Journal of Plant Protection and Pathology ◽

10.21608/jppp.2012.83791 ◽

2012 ◽

Vol 3 (5) ◽

pp. 491-502

Author(s):

M. El-Metwally

Keyword(s):

Fruit Fly ◽

Field Conditions ◽

Bactrocera Oleae ◽

Olive Fruit Fly ◽

Olive Fruit ◽

Food Attractants ◽

Ammonium Compounds

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Relative Densities of the Parasitoids and Predators Associated with the Olive Fruit Fly Bactrocera oleae (Gmelin) at Khan-Aranaba, El Qunitera, Syria

Arab Journal Of Plant Protection ◽

10.22268/ajpp-034.3.180186 ◽

2016 ◽

Vol 34 (3) ◽

pp. 180-186

Author(s):

A. N. Bashir ◽

◽

L. Aslan ◽

F. Abdel-Razzak ◽

◽

...

Keyword(s):

Fruit Fly ◽

Bactrocera Oleae ◽

Olive Fruit Fly ◽

Olive Fruit

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Application of oviposition deterrent compounds for the control of olive fruit fly, Bactrocera oleae Rossi. (Dip. Tephritidae) control

International Journal of Tropical Insect Science ◽

10.1007/s42690-021-00518-3 ◽

2021 ◽

Author(s):

Mohammad Reza Abbasi Mojdehi ◽

Ali Akbar Keyhanian ◽

Bahareh Rafiei

Keyword(s):

Fruit Fly ◽

Oviposition Deterrent ◽

Bactrocera Oleae ◽

Olive Fruit Fly ◽

Olive Fruit

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Land-Use Effect on Olive Groves Pest Prays oleae and on Its Potential Biocontrol Agent Chrysoperla carnea

Insects ◽

10.3390/insects12010046 ◽

2021 ◽

Vol 12 (1) ◽

pp. 46

Author(s):

João Frederico Alves ◽

Sara Mendes ◽

António Alves da Silva ◽

José Paulo Sousa ◽

Daniel Paredes

Keyword(s):

Biological Control ◽

Land Use ◽

Biological Control Agent ◽

Control Agent ◽

Agricultural Landscapes ◽

Chrysoperla Carnea ◽

Land Uses ◽

Prays Oleae ◽

Potential Biocontrol Agent ◽

Olive Groves

Olive growing has been intensified through the simplification of agricultural landscapes. In order to rethink the environmental drawbacks of these practices, conservation biological control techniques have been examined. In this work, Prays oleae and its natural enemy Chrysoperla carnea were monitored to account for the effects of the amount and diversity of different land-uses. We found that C. carnea showed an attraction to areas with high abundances of P. oleae but this predator did not display any affection by the different land-uses. Inversely, P. oleae abundance was lower in diverse landscapes and higher in simplified ones. Importantly, higher abundances of C. carnea were related to lower infestation levels of P. oleae in the late part of the season. These results corroborate the attraction of C. carnea to the olive moth, highlighting the potential of C. carnea as a biological control agent of this pest, assert that the promotion of land-use diversity can reduce P. oleae and confirm that landscapes dominated by olive groves can promote this pest. The present study aims at contributing to the discussion about the management of agricultural ecosystems by providing farmers with sustainable alternatives that do not have harmful effects on the environment and public health.

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