TY - JOUR
T1 - Brassica patch geometry and adjacent matrix
T2 - how small-scale changes in landscape can affect Plutella xylostella populations
AU - Grilli, Mariano P.
AU - Espinoza-Gavilanez, Rosita
N1 - Publisher Copyright:
© 2021 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2021
Y1 - 2021
N2 - Herbivorous insects are predicted to have higher densities in larger patches, while their natural enemies will be more affected by the edge of these patches. In this paper, we investigate the effect of the relationship between brassica horticultural plot shape and the adjacent land use on the abundance of P. xylostella and its chances to be parasitised. Samples were collected from brassica plots during spring. Landscape metrics of the study area were estimated using Landsat images. We found a negative relationship between the pest abundance and the perimeter-to-area ratio of the brassica plot, and a positive relationship with land cover estimated from Landsat images. The proportion of parasitised immatures showed opposite relationship with the same variables. Implications of these findings are discussed.
AB - Herbivorous insects are predicted to have higher densities in larger patches, while their natural enemies will be more affected by the edge of these patches. In this paper, we investigate the effect of the relationship between brassica horticultural plot shape and the adjacent land use on the abundance of P. xylostella and its chances to be parasitised. Samples were collected from brassica plots during spring. Landscape metrics of the study area were estimated using Landsat images. We found a negative relationship between the pest abundance and the perimeter-to-area ratio of the brassica plot, and a positive relationship with land cover estimated from Landsat images. The proportion of parasitised immatures showed opposite relationship with the same variables. Implications of these findings are discussed.
KW - Diamondback moth
KW - horticultural land use
KW - parasitism
KW - perimeter-to-area ratio
UR - http://www.scopus.com/inward/record.url?scp=85119669954&partnerID=8YFLogxK
U2 - 10.1080/09670874.2021.2005179
DO - 10.1080/09670874.2021.2005179
M3 - Article
AN - SCOPUS:85119669954
SN - 0967-0874
JO - International Journal of Pest Management
JF - International Journal of Pest Management
ER -