The Practice of Forest Insect Management

Berryman, Alan A.

doi:10.1007/978-1-4684-5080-4_11

Cited by 11 publications

(3 citation statements)

References 85 publications

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“…Surveillance plays a crucial role in the integrated control of harmful agents, as it enables the assessment of their temporal evolution, spread patterns, and the resulting damage. The selection of appropriate surveillance methods depends on various factors, including the size of the forested area, the specific biotic or abiotic agents being monitored, and the tree species that are susceptible to these agents (Berryman 1986).…”

Section: Methodsmentioning

confidence: 99%

The use of remote sensing indices derived from Sentinel 2 satellite images for the defoliation damage assessment of Lymantria dispar

Buzatu,

Nețoiu,

Apostol

et al. 2023

AFR

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Monitoring and assessing the phytosanitary status of forests is a crucial activity in forest protection field, and the use of satellite remote sensing has become increasingly prevalent in this regard. Satellite images offer valuable information in terms of time and space, particularly through the analysis of vegetation and biophysical indices. Within this context, the aim of the study was to explore the potential of satellite remote sensing methods to monitor and assess the extent of tree defoliation caused by the gypsy moth (Lymantria dispar). The research study was focused on a forest situated in the Oltenia region of Romania, which experienced a gradation period for the defoliator L. dispar between 2018 and 2020. To determine the extent of defoliation caused by L. dispar in 2020 and 2021, a rectangular network consisting of 70 one-hectare sample areas was implemented. Each sample area had a square shape with a side of 100 m. In each corner of the sample areas, sub-sample circles with a radius of 12.62 meters were established, in which visual observations regarding the defoliation levels were conducted. The study involved a comparison between thematic maps derived from ground observations and those based on specific remote sensing indices derived through the processing of Sentinel 2 satellite images, of the Ciuturica forest area during the years 2020 and 2021. The research study indicated that the canopy water content (CWC) index was the most suitable for assessing defoliation caused by L. dispar. Furthermore, the study highlighted that remote sensing methods could be very effective and easily applicable, complementing the field ground-based efforts in monitoring and assessing the impact of L. dispar infestations.

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Section: Methodsmentioning

confidence: 99%

The use of remote sensing indices derived from Sentinel 2 satellite images for the defoliation damage assessment of Lymantria dispar

Buzatu,

Nețoiu,

Apostol

et al. 2023

AFR

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“…Another factor may be the shorter vegetation period in Scots pine growing environments due to higher altitudes, as insects prefer lower altitudes for wintering. Several studies have identi ed temperature, humidity, precipitation, and wind speed as the most important environmental factors in uencing the survival and development of insects (Stanton, 1983;Berryman, 1986;Córdoba-Aguilar et al, 2018;Dent, 2000). Temperature plays a crucial role in the wintering site selection of many insects, while photoperiod promotes overwintering (Leather et al, 1995).…”

Section: Formation Of Empty Seeds In Black Pine (Pinus Nigra)mentioning

confidence: 99%

Determining Empty Seed Formation and Germination Rates Induced by Leptoglossus occidentalis (Heidemann) in Coniferous Species in Turkiye Forests

parlak,

YILMAZ

2024

Preprint

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In recent years, low germination rates have been a problem in the seeds of various coniferous species in Turkiye, particularly Turkish red pine (Pinus brutia) and black pine (Pinus nigra), which are commonly used species for afforestation activities. The increase in low germination rates corresponds to the spread of Leptoglossus occidentalis in coniferous forests, suggesting an investigation of potential correlation between the spread of this insect and the empty seed formation and germination rates. This study aimed to investigate the main causes of empty seeds and low germination rates induced by Leptoglossus occidentalis (Heidemann) in coniferous species in Turkiye. In the study, sample cones from various coniferous species including Fir (Abies spp.), Stone pine (Pinus pinea), Turkish red pine (Pinus brutia), Spruce (Picea orientalis), Cedar (Cedrus libani), Maritime pine (Pinus pinaster), Black pine (Pinus nigra) and Scots pine (Pinus sylvestris) were collected based on their geographical distribution, and then their seeds were extracted. The 1000-seed weights were determined for each species, followed by germination tests conducted under controlled conditions. Statistical analysis revealed significant variations in germination rates among species. Among the eight species examined, Scots pine (Pinus sylvestris) had the highest germination rate at 37.9%, while fir (Abies spp) had the lowest rate at 0.4%. Further statistical analysis revealed variations in germination rates based on aspects, with generally higher rates observed in sunny aspects. The results indicated that Leptoglossus occidentalis caused a significant decrease in seed germination ranging from 60–99% in coniferous species. Additionally, reductions in 1000-seed weights ranging from 19–81% were observed in the species, except Scots pine. The findings highlight widespread germination issues in seeds of majority of the coniferous tree in Turkiye. As a result, it was found that L. occidentalis significantly contributes to empty seed formation and lower germination rates in coniferous forests. Therefore, it is essential to develop strategies to protect and conserve seed resources to mitigate any negative impacts on forest resources.

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“…Such extraordinary density changes may be abrupt and ostensibly random, or population peaks may occur in a more or less cyclic fashion. Whether the observed population behavior is a consequence of external forces, such as macro climatic conditions, or is underlined by local conditions and the life history of the species involved, still remains a key issue [1,2,21,4,17,26].…”

mentioning

confidence: 99%

Life history traits of <em> Sirex Noctilio</em> F. (Hymenoptera: Siricidae) can explain outbreaks independently of environmental factors

Aparicio¹,

Corley²,

Rabinovich³

2013

MBE

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The woodwasp Sirex noctilio is a major pest of pine plantations worldwide. Economically significant damage is however limited to outbreak populations. To understand what determines outbreaks dynamics in this species, we developed an individual based model for a wasp population developing within a pine plantation. We show that outbreaks may be the result of the insect's life history. Specifically we show that limited dispersal may not only increase population persistence but also create the conditions for eruptive dynamics. When the probability of long distance dispersal is greater than zero, but relatively small (P(LDD) = 0.1) large outbreaks are the norm, with all of the suitable trees dead at the end of the simulation. For P(LDD) = 0 (only local dispersal allowed) outbreaks are smaller in size, and in some cases not well defined and spread over longer periods. For P(LDD) = 1 (only long distance dispersal allowed), the frequency of local population extinction (without outbreaks) increases significantly. Aggregated attacks may induce physiological changes in the trees which could allow other wasps to detect them. These changes may in turn trigger an outbreak. In contrast, healthy, vigorous trees are not suitable for wasp oviposition. In our model the density of suitable trees (healthy trees but yet suitable for oviposition) are a key factor determining population persistence before outbreaks. From an applied perspective, our results emphasize the importance of adequate plantation management in preventing woodwasp infestation.

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The Practice of Forest Insect Management

Cited by 11 publications

References 85 publications

The use of remote sensing indices derived from Sentinel 2 satellite images for the defoliation damage assessment of Lymantria dispar

The use of remote sensing indices derived from Sentinel 2 satellite images for the defoliation damage assessment of Lymantria dispar

Determining Empty Seed Formation and Germination Rates Induced by Leptoglossus occidentalis (Heidemann) in Coniferous Species in Turkiye Forests

Life history traits of <em> Sirex Noctilio</em> F. (Hymenoptera: Siricidae) can explain outbreaks independently of environmental factors

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