FACTORS AFFECTING THE MORTALITY OF LEAFMINERS <i>ARGYRESTHIA THUIELLA</i> AND <i>PULICALVARIA THUJAELLA</i> (LEPIDOPTERA: YPONOMEUTIDAE AND GELECHIIDAE) ON EASTERN WHITE CEDAR, IN ONTARIO

Bazinet, N. L.; Sears, M. K.

doi:10.4039/ent1111299-11

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…In Quebec, Canada, Juillet (1972) recorded 26 species of parasitoids collectively destroying 50% of several species of arborvitae leafminers. In addition, a study by Bazinet and Sears (1979) found seven parasitoids species caused 9%-18% mortality of ALM, but their impact was reduced due to 63% winter-related mortality in 1977.…”

Section: Host Plant Characteristicsmentioning

confidence: 99%

Relative Susceptibility Among Arborvitae Cultivars to Arborvitae Leafminer, Argyresthia thuiella (Lepidoptera: Argyresthiidae)

Miller¹,

Danielson²

2017

AUF

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Eighteen Thuja species and cultivars were evaluated for ovipositional preference for, and relative susceptibility to, feeding by the arborvitae leafminer. Thuja occidentalis ‘Hetz Midget’ and ‘Hoopesii’ were least susceptible; T. occidentalis cultivars 'Gracilis', 'Holmstrup', 'Spiralis', and 'Techny', and T. plicata 'Fastigiata', were intermediate in susceptibility; Thuja occidentalis cultivars 'Aurea', 'Douglasii Aurea', 'Globosa', 'Hetz Wintergreen', 'Smaragd', 'Umbraculifera', 'Wagneri', 'Wareana,' and 'Waxen', and species T. occidentalis, and T. plicata, were highly susceptible to ALM feeding. Short trees suffered significantly less feeding compared to tall trees, with number of infested branch tips (IBTs) increasing with tree height. Short trees (<4 m) had significantly more feeding damage in the upper canopy zone and tall trees (>4 m) had greater damage in the lower and middle zones. Trees with very dense canopies had significantly fewer IBTs compared to trees with sparse, medium, and dense canopies, with IBTs decreasing as canopy density increased. There were no significant associations between number of IBTs and canopy aspect. Plant height, growth habit, and canopy zone and density appear to influence infestation levels and possibly ovipositional preference. These findings suggest some important ALM management guidelines for the nursery and landscape industries.

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Section: Host Plant Characteristicsmentioning

confidence: 99%

Relative Susceptibility Among Arborvitae Cultivars to Arborvitae Leafminer, Argyresthia thuiella (Lepidoptera: Argyresthiidae)

Miller¹,

Danielson²

2017

AUF

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Survival Patterns and Mortality Sources of Herbivorous Insects: Some Demographic Trends

Cornell¹,

Hawkins²

1995

The American Naturalist

215

181

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Ecology and Behavior of First Instar Larval Lepidoptera

Zalucki

Clarke

Malcolm

2002

Annu. Rev. Entomol.

468

529

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Neonate Lepidoptera are confronted with the daunting task of establishing themselves on a food plant. The factors relevant to this process need to be considered at spatial and temporal scales relevant to the larva and not the investigator. Neonates have to cope with an array of plant surface characters as well as internal characters once the integument is ruptured. These characters, as well as microclimatic conditions, vary within and between plant modules and interact with larval feeding requirements, strongly affecting movement behavior, which may be extensive even for such small organisms. In addition to these factors, there is an array of predators, pathogens, and parasitoids with which first instars must contend. Not surprisingly, mortality in neonates is high but can vary widely. Experimental and manipulative studies, as well as detailed observations of the animal, are vital if the subtle interaction of factors responsible for this high and variable mortality are to be understood. These studies are essential for an understanding of theories linking female oviposition behavior with larval survival, plant defense theory, and population dynamics, as well as modern crop resistance breeding programs.

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FACTORS AFFECTING THE MORTALITY OF LEAFMINERS ARGYRESTHIA THUIELLA AND PULICALVARIA THUJAELLA (LEPIDOPTERA: YPONOMEUTIDAE AND GELECHIIDAE) ON EASTERN WHITE CEDAR, IN ONTARIO

Cited by 3 publications

References 14 publications

Relative Susceptibility Among Arborvitae Cultivars to Arborvitae Leafminer, Argyresthia thuiella (Lepidoptera: Argyresthiidae)

Relative Susceptibility Among Arborvitae Cultivars to Arborvitae Leafminer, Argyresthia thuiella (Lepidoptera: Argyresthiidae)

Survival Patterns and Mortality Sources of Herbivorous Insects: Some Demographic Trends

Ecology and Behavior of First Instar Larval Lepidoptera

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