Trialeurodes abutiloneus (Haldeman) (Hemiptera: Aleyrodidae), a species long present but never officially recorded in Canada

2018 ◽  
Vol 150 (4) ◽  
pp. 532-538
Author(s):  
Julia J. Mlynarek ◽  
Roselyne M. Labbé
Keyword(s):  
New York ◽  
National Park ◽  
Close Association ◽  
The United States ◽  
Plant Diseases ◽  
Life Stages ◽  
Major Pest ◽  
Point Pelee ◽  
Point Pelee National Park ◽  
Surprising Fact

AbstractTrialeurodes abutiloneus (Haldeman) (Hemiptera: Aleyrodidae) is known to have been present in Canada since 1973. Despite this, the species has until now not been officially recorded; a surprising fact considering the close association of the species with economically important crops. The historic distribution expands from Mexico to southern New York and Michigan in the United States of America. In 2016, all life stages of T. abutiloneus were collected again on soybean (Glycine max (Linnaeus) Merrill; Fabaceae) plants grown in research greenhouses in southwestern Ontario, Canada. Specimens were morphologically and genetically identified to confirm their identity as T. abutiloneus. Thereafter, the barcode sequence for this species was also identified from the barcode of life data system, informing on the prior detection of this species from specimens collected at Point Pelee National Park, Ontario, Canada in 2012 during a barcode of life collection. Although this species is not considered a major pest on crops in Canada, it is related to other common pests within the same genus and can potentially transmit similar plant diseases. We provide the barcode COI sequence for the species, give an overview of the documented host range pertinent to Canada, and provide information concerning its natural enemies.

scholarly journals Breeding Birds of Mature Woodlands of Point Pelee National Park Prior to Infestation by Emerald Ash Borer, Agrilus planipennis

2009 ◽  
Vol 123 (2) ◽  
pp. 99 ◽  
Author(s):  
Holly D. Dodds ◽  
Gard W. Otis
Keyword(s):  
National Park ◽  
Emerald Ash Borer ◽  
Breeding Birds ◽  
Agrilus Planipennis ◽  
Forest Communities ◽  
Breeding Bird ◽  
Animal Diversity ◽  
Ash Trees ◽  
Point Pelee ◽  
Point Pelee National Park

The Emerald Ash Borer (EAB) is a wood-boring beetle native to Asia that now infests and kills ash trees (Fraxinus spp.) in North America. Many ecological communities will be dramatically altered by the mortality of ash trees caused by this invasive insect. The EAB recently colonized Point Pelee National Park of Canada in extreme southwestern Ontario, Canada, a site famous for its unusual plant and animal diversity as well as its extraordinary bird migrations. We conducted a census of breeding birds in two ash-rich mature forests at Point Pelee in order to obtain baseline data on the breeding bird communities prior to changes in forest communities that are likely to be caused by the EAB. Here we report the results of the bird census and review possible changes to the breeding bird fauna of Point Pelee that may result from ash tree mortality and the associated disruption of forest communities.

Field tests of competitive interference for space among temperate-zone rodents

1983 ◽  
Vol 61 (7) ◽  
pp. 1517-1523 ◽  
Author(s):  
Douglas W. Morris
Keyword(s):  
Small Mammal ◽  
National Park ◽  
Field Tests ◽  
Temperate Zone ◽  
Mammal Species ◽  
Competitive Interference ◽  
Point Pelee ◽  
Mammal Faunas ◽  
Point Pelee National Park ◽  
Small Mammal Species

Within-habitat distributions of common rodent species in two temperate-zone small mammal faunas were analyzed by a series of interaction tests to evaluate the hypothesis that the distribution and abundance of these animals is determined by competitive interference for space. In the Rocky Mountains of Alberta, Peromyscus maniculatus and Clethrionomys gapperi were independently distributed and there was no consistent relationship between the densities of the two species over a broad range of habitats. At Point Pelee National Park in Ontario, Peromyscus leucopus and Microtus pennsylvanicus distributions were also independent of one another, and again there was no relationship between the densities of these rodents across habitats. These field tests favour rejection of the hypothesis of competitive interference for space among temperate-zone small mammal species.

THE BIOLOGY OF THE TREE-HOLES OF POINT PELEE NATIONAL PARK, ONTARIO: II. FIRST RECORD OF TOXORHYNCHITES RUTILUS SEPTENTRIONALIS IN CANADA (DIPTERA: CULICIDAE)

1977 ◽  
Vol 109 (1) ◽  
pp. 93-94 ◽  
Author(s):  
D. J. Parker
Keyword(s):  
National Park ◽  
Deciduous Forest ◽  
First Record ◽  
Tree Holes ◽  
Point Pelee ◽  
First Time ◽  
Point Pelee National Park ◽  
Toxorhynchites Rutilus

AbstractThe mosquito Toxorhynchites rutilus septentrionalis (Dyar and Knab) is recorded for the first time in Canada. The species was found breeding in a water-filled rot cavity in a tree in the deciduous forest of Point Pelee National Park. The distribution of the species for which this record represents an extension of the range is discussed.

scholarly journals First Report of Downy Mildew Caused by Peronospora parasitica on Iberis sempervirens in Italy

Plant Disease ◽  
2006 ◽  
Vol 90 (9) ◽  
pp. 1261-1261
Author(s):  
A. Garibaldi ◽  
A. Minuto ◽  
M. L. Gullino
Keyword(s):  
New York ◽  
Downy Mildew ◽  
Morphological Characteristics ◽  
Sprinkler Irrigation ◽  
The United States ◽  
Plant Diseases ◽  
Pathogenicity Test ◽  
Peronospora Parasitica ◽  
First Report ◽  
Downy Mildews

Iberis sempervirens (evergreen candytuft) is a garden species belonging to the Brassicaceae family. During June 2004, a damaging foliar disease was observed in several commercial farms near Albenga (northern Italy) on I. sempervirens plants grown outdoors in containers. More than 30% of the plants were affected. Symptoms appeared on both sides of leaves, buds, flowers, and fruits. Initially, leaves were slightly chlorotic, but within 5 to 7 days a characteristic whitish furry growth developed on the lower and upper leaf surfaces. The efflorescence was particularly evident on the lower surfaces of leaves and consisted of sporangiophores and sporangia. The appearance and severity of the disease increased because of overhead sprinkler irrigation. Microscopic observations revealed dichotomously branched sporangiophores with slender curved tips. Sporangiophores with a length of 115 to 410 μm (average 295 μm) ended with sterigmata bearing single sporangia. Sporangia were ovoid and measured 18 to 28 × 25 to 45 μm (average 22 × 35 μm). The pathogen was identified as Peronospora parasitica on the basis of its morphological characteristics (3). Pathogenicity was confirmed by inoculating leaves of 10 45-day-old healthy plants grown in 14-cm-diameter pots with a sporangial suspension (1 × 103 conidia/ml). Ten noninoculated plants served as controls. Plants were maintained outdoors at 50% light intensity with temperatures ranging between 16 and 25°C (average 18°C) and 85 to 100% relative humidity. The pathogenicity test was carried out twice. After 18 days, typical symptoms of downy mildew developed on the inoculated plants and P. parasitica was observed on the leaves. Noninoculated plants did not show symptoms. To our knowledge, this is the first report of P. parasitica on evergreen candytuft in Italy. P. parasitica was previously reported on I. sempervirens in the United Kingdom (1) and on I. amara in California (2). Voucher specimens are available at the AGROINNOVA Collection, University of Torino, Italy. References: (1) S. Francis and G. Waterhouse. Trans. Br. Mycol. Soc. 91:1, 1988. (2) P. R. Muller et al. Index of Plant Diseases in the United States. USDA Handbook No. 165, 1960. (3) D. M. Spencer. The Downy Mildews. Academic Press, New York, 1981.

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