Is insecticide spraying a viable and cost-efficient management practice to control pine processionary moth in Mediterranean woodlands?

Cayuela, Luis; Hódar, José A.; Zamora, Regino

doi:10.1016/j.foreco.2011.01.022

Cited by 33 publications

(22 citation statements)

References 13 publications

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“…In this work, we used the entire database of the Andalusian Environmental Council (4158 stands) for the period 1992-2009. We did not attempt to separate in this study stands that had been subjected to aerial fumigation of insecticides to control PPM and untreated stands, as a previous study showed that the degree of infestation by PPM decreases substantially after an outbreak both in fumigated and untreated woodlands (Cayuela et al 2011). This suggests that, at the stand level, the PPM cycle may be at least partially under natural biological control (predators-parasitoids, host plant, or both; see also Hódar and Zamora 2009).…”

Section: Methodsmentioning

confidence: 99%

Climate change and the incidence of a forest pest in Mediterranean ecosystems: can the North Atlantic Oscillation be used as a predictor?

2011

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Many forest pest species strongly depend on temperature in their population dynamics, so that rising temperatures worldwide as a consequence of climatic change are leading to increased frequencies and intensities of insect-pest outbreaks. In the Mediterranean area, the climatic conditions are strongly linked to the effects of the North Atlantic Oscillation (NAO). The aim of this work is to analyze the dynamics of the pine processionary moth (Thaumetopoea pityocampa), a severe pest of Pinus species in the Circunmediterranean, throughout a region of southern Spain, in relation to NAO indices. We related the percentage of forest plots with high defoliation by pine processionary moth each year with NAO values for the present and the three previous winters, using generalized linear models with a binomial error distribution. The time series is 16-year long, and we performed analyses for the whole database and for the five main pine species separately. We found a consistent relationship between the response variable and the NAO index. The relationship is stronger with pine species living at medium-high altitudes, such as Aleppo (P. halepensis), black (P. nigra), and Scots (Pinus sylvestris) pine, which show the higher defoliation intensities up to 3 years after a negative NAO phase. The results highlight, for the first time, the usefulness of using global drivers in order to understand the dynamics of pest outbreaks at a regional scale, and they open the window to the development of NAO-based predictive models as an early-warning signal of severe pest outbreaks.

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Section: Methodsmentioning

confidence: 99%

Climate change and the incidence of a forest pest in Mediterranean ecosystems: can the North Atlantic Oscillation be used as a predictor?

2011

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“…The life cycle is characterized by a short-lived moth which typically lives one night and emerges in summer (June-August), larval feeding during fall and winter, and pupation in the soil followed by a short or prolonged (up to 7 years) diapauses [1,9,30]. The female moth produces pheromones in the summer to attract the male moth.…”

Section: Ppm Life Cyclementioning

confidence: 99%

“…Defoliating insects causing large-scale outbreaks such as the pine processionary moth (Thaumetopoea pityocampa Dennis and Schiff., Lepidoptera: Notodontidae; henceforth PPM) are considered as a major driver of forest dynamics in many regions [1]. Populations of these species rise periodically to explosive population levels and induce critical impacts in key vegetation processes such as tree vitality or survival [2].…”

Section: Introductionmentioning

confidence: 99%

Assessing Pine Processionary Moth Defoliation Using Unmanned Aerial Systems

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Vepakomma

Brotons

2017

Forests

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Pine processionary moth (PPM) is one of the most destructive insect defoliators in the Mediterranean for many conifers, causing losses of growth, vitality and eventually the death of trees during outbreaks. There is a growing need for cost-effective monitoring of the temporal and spatial impacts of PPM in forest ecology to better assess outbreak spread patterns and provide guidance on the development of measures targeting the negative impacts of the species on forests, industry and human health. Remote sensing technology mounted on unmanned aerial systems (UASs) with high-resolution image processing has been proposed to assess insect outbreak impacts at local and forest stand levels. Here, we used UAS-acquired RGB imagery in two pine sites to quantify defoliation at the tree-level and to verify the accuracy of the estimates. Our results allowed the identification of healthy, infested and completely defoliated trees and suggested that pine defoliation estimates using UASs are robust and allow high-accuracy (79%) field-based infestation indexes to be derived that are comparable to those used by forest technicians. When compared to current field-based methods, our approach provides PPM impact assessments with an efficient data acquisition method in terms of time and staff, allowing the quantitative estimation of defoliation at tree-level scale. Furthermore, our method could be expanded to a number of situations and scaled up in combination with satellite remote sensing imagery or citizen science approaches.

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“…La capacidad para incrementar sus poblaciones en poco tiempo (3) es inherente a las características reproductivas de la procesionaria, y poco podemos hacer contra ella. La procesionaria seguirá poniendo 200 huevos por puesta de promedio, y podremos reducir su éxito reproductivo liberando parasitoides, poniendo trampas de feromona, cajas-nido o fumigando, pero esto son soluciones caras (que además tendrán que ser cada vez más reiteradas) y cuya eficacia es, como poco, discutible (Cayuela et al 2011). …”

Section: Controlar El Hábitat Para Controlar a La Plagaunclassified