Spatial distribution of Diamondback moth,<i>Plutella xylostella</i>L. (Lepidoptera: Plutellidae), at the field and the regional level in Ethiopia

Ayalew, Gashawbeza; Sciarretta, Andrea; Baumgärtner, J.; Ogol, C. K. P. O.; Löhr, B.

doi:10.1080/09670870701613743

Cited by 8 publications

(7 citation statements)

References 21 publications

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“…Individuals in some months were also located with low numbers, outside cabbage fields, most likely because moths were caught during their host searching flight. This varying response, reported also by other authors, was strongly related to the presence of cabbage 46 , 47 and the dispersal pattern of P . xylostella population dynamics is associated with the shortage of favorable food 48 .…”

Section: Discussionsupporting

confidence: 77%

“…xylostella distribution in our study increased towards the area of cruciferous vegetable growing, especially the cultivation of Brassica crops. Plutella xylostella captures were highly influenced by cropping systems at the regional level and the spatial trend of dispersion was consistent with the cabbage field 46 . In farmland ecosystems, P .…”

Section: Discussionsupporting

confidence: 64%

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Spatio-temporal distribution patterns of Plutella xylostella (Lepidoptera: Plutellidae) in a fine-scale agricultural landscape based on geostatistical analysis

Chen

Shi

et al. 2021

Sci Rep

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A detailed knowledge on the spatial distribution of pests is crucial for predicting population outbreaks or developing control strategies and sustainable management plans. The diamondback moth, Plutella xylostella, is one of the most destructive pests of cruciferous crops worldwide. Despite the abundant research on the species’s ecology, little is known about the spatio-temporal pattern of P. xylostella in an agricultural landscape. Therefore, in this study, the spatial distribution of P. xylostella was characterized to assess the effect of landscape elements in a fine-scale agricultural landscape by geostatistical analysis. The P. xylostella adults captured by pheromone-baited traps showed a seasonal pattern of population fluctuation from October 2015 to September 2017, with a marked peak in spring, suggesting that mild temperatures, 15–25 °C, are favorable for P. xylostella. Geostatistics (GS) correlograms fitted with spherical and Gaussian models showed an aggregated distribution in 21 of the 47 cases interpolation contour maps. This result highlighted that spatial distribution of P. xylostella was not limited to the Brassica vegetable field, but presence was the highest there. Nevertheless, population aggregations also showed a seasonal variation associated with the growing stage of host plants. GS model analysis showed higher abundances in cruciferous fields than in any other patches of the landscape, indicating a strong host plant dependency. We demonstrate that Brassica vegetables distribution and growth stage, have dominant impacts on the spatial distribution of P. xylostella in a fine-scale landscape. This work clarified the spatio-temporal dynamic and distribution patterns of P. xylostella in an agricultural landscape, and the distribution model developed by geostatistical analysis can provide a scientific basis for precise targeting and localized control of P. xylostella.

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Section: Discussionsupporting

confidence: 77%

Section: Discussionsupporting

confidence: 64%

Spatio-temporal distribution patterns of Plutella xylostella (Lepidoptera: Plutellidae) in a fine-scale agricultural landscape based on geostatistical analysis

Chen

Shi

et al. 2021

Sci Rep

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“…The highest thrips densities were found in the middle of tunnels. Similar observations have been made of the diamondback moth and the cabbage webworm in different crops [ 73 , 74 ]. The slope at the study site may have caused the middle of the tunnels to be warmer than the area by the tunnel openings due to the upwards wind, a factor which possibly also contributed to a higher number of thrips in the centre of the tunnels.…”

Section: Discussionsupporting

confidence: 83%

Species Composition of Thrips (Thysanoptera: Thripidae) in Strawberry High Tunnels in Denmark

Nielsen

Sigsgaard

Kobro

et al. 2021

Insects

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Thrips are a major pest in protected strawberry production. Knowledge of thrips species composition could be instrumental for improved thrips management, but very little is known about which species are present in strawberries grown in high-tunnels in Denmark. Thrips (adults and larvae) were sampled in two strawberry tunnels of the cultivars Murano and Furore from May to August 2018, in the middle and in the edges of the tunnels. The most abundant thrips species found in the tunnels were Frankliniella intonsa and Thrips tabaci adults. Frankliniella intonsa were also the most frequently found species of the immatures sampled, followed by T. tabaci larvae, and other species. The number of thrips differed between the two cultivars, sampling times and location in the tunnel. Frankliniella intonsa was more abundant in the middle of the tunnels, while T. tabaci was more abundant in the edge of the tunnels adjacent to the field margins. The number of thrips peaked by the end of July. Both chemical and biological control should consider species composition and occurrence; hence, a fundamental first step for thrips management is to identify the species present on the target crop.

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“…Studies at this level can have the objective of obtaining a general frame of the pest presence in a large area, but investigations can also be directed to verify spatial relationships of the pest with specific variables (Ayalew et al 2008). For example, a study carried out on 160 000 ha in Catalonia, Spain, aimed at analysing the current codling moth pheromone trap spatial distribution and verifying the presence of anisotropic effects due to predominant wind directions (Comas et al 2012).…”

Section: Scale Issuesmentioning

confidence: 99%

Geostatistical tools for the study of insect spatial distribution: practical implications in the integrated management of orchard and vineyard pests

Sciarretta¹,

Trematerra²

2014

Plant Prot. Sci.

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Sciarretta A., Trematerra P. (2014): Geostatistical tools for the study of insect spatial distribution: practical implications in the integrated management of orchard and vineyard pests. Plant Protect. Sci., 50: 97-110.Spatial heterogeneity in agricultural systems is recognised as an important source of variability to be investigated. In the evolution of Integrated Pest Management (IPM), patterns and processes that influence spatio-temporal dynamics in insect populations tend to assume more importance compared to the classical theory. Geostatistics represent a valuable tool to investigate the spatial pattern of insect populations and to support pest control. After an explanation of the geostatistical analysis, in the present paper we provided an overview of practical applications in managing pests, focusing on fruit orchards and vineyards. The utility of geostatistical tools is illustrated with examples taken from field studies, with attention to the analysis of spatial patterns, monitoring schemes, use of traps, scale issues, precision targeting, and risk assessment maps. Potential approaches in the context of IPM are discussed in relation to future perspectives.

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Spatial distribution of Diamondback moth,Plutella xylostellaL. (Lepidoptera: Plutellidae), at the field and the regional level in Ethiopia

Cited by 8 publications

References 21 publications

Spatio-temporal distribution patterns of Plutella xylostella (Lepidoptera: Plutellidae) in a fine-scale agricultural landscape based on geostatistical analysis

Spatio-temporal distribution patterns of Plutella xylostella (Lepidoptera: Plutellidae) in a fine-scale agricultural landscape based on geostatistical analysis

Species Composition of Thrips (Thysanoptera: Thripidae) in Strawberry High Tunnels in Denmark

Geostatistical tools for the study of insect spatial distribution: practical implications in the integrated management of orchard and vineyard pests

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