Acarine Pests

2020 ◽  
pp. 31-43
Author(s):  
Patricia J. Vittum
Keyword(s):  
North America ◽  
Plant Tissue ◽  
Economic Importance ◽  
Physiological Characteristics ◽  
Banks Grass Mite

This chapter examines mites. Mites are arthropods in the class Arachnida, order Acari, and have several morphological and physiological characteristics that differ from insects. Many mites of economic importance in agriculture develop very rapidly and complete several generations each year. Mouthparts of mites are described as rasping and sucking — the mite rasps a wound on the surface of plant tissue and then laps or sucks up the resulting plant exudate. Several mites attack turfgrass in various regions of North America. The chapter then looks at the bermudagrass mite, the zoysiagrass mite, the buffalograss mite, the winter grain mite, the clover mite, and the banks grass mite.

An Interesting Attractant for Priacma serrata (Lee), (Cupesidae: Coleoptera)

1957 ◽  
Vol 89 (5) ◽  
pp. 214-219 ◽  
Author(s):  
M. D. Atkins
Keyword(s):  
North America ◽  
Economic Importance ◽  
Field Station ◽  
Rotten Wood ◽  
Rotting Wood ◽  
Large Numbers ◽  
The Family ◽  
The Trinity

On the warm morning of May 27, 1956 at the Trinity Valley field station near Lumby, B.C., some laundry hanging out to dry attracted large numbers of a strange Cerambycid-like beetle. Closer examination showed this insect to be Priacma serrata (Lec.) of the family Cupesidae (Fig. 1), an interesting and infrequently collected species.The family Cupesidae seems to have no economic importance, having only two genera and five species in North America that have been described (Blatchley, 1910). The larvae are reported to live in rotten wood; dissection of some adults collected at this time produced an entirely empty and deflated gut. The females and larvae of the closely related Micromalthus debilis Lec. are found in rotting wood in North America and were reported from decaying mine timbers far under ground in Johannesburg.

scholarly journals Current and Future Potential Distribution of the Xerophytic Shrub Candelilla (Euphorbia antisyphilitica) under Two Climate Change Scenarios

Forests ◽  
2020 ◽  
Vol 11 (5) ◽  
pp. 530 ◽  
Author(s):  
Gonzalo Vargas-Piedra ◽  
Ricardo David Valdez-Cepeda ◽  
Armando López-Santos ◽  
Arnoldo Flores-Hernández ◽  
Nathalie S. Hernández-Quiroz ◽  
...  
Keyword(s):  
Climate Change ◽  
North America ◽  
Habitat Suitability ◽  
Potential Distribution ◽  
The United States ◽  
Economic Importance ◽  
Distribution Area ◽  
Climate Projections ◽  
Geophysical Fluid Dynamics Laboratory ◽  
Climate Change Scenarios

Candelilla (Euphorbia antisyphilitica Zucc.) is a shrub species distributed throughout the Chihuahuan Desert in northern Mexico and southern of the United States of America. Candelilla has an economic importance due to natural wax it produces. The economic importance and the intense harvest of the wax from candelilla seems to gradually reduce the natural populations of this species. The essence of this research was to project the potential distribution of candelilla populations under different climate change scenarios in its natural distribution area in North America. We created a spatial database with points of candelilla presence, according to the Global Biodiversity Information Facility (GBIF). A spatial analysis to predict the potential distribution of the species using Maxent software was performed. Thirteen of 19 variables from the WorldClim database were used for two scenarios of representative concentration pathways (RCPs) (4.5 as a conservative and 8.5 as extreme). We used climate projections from three global climate models (GCMs) (Max Planck institute, the Geophysical Fluid Dynamics Laboratory and the Met Office Hadley), each simulating the two scenarios. The final predicted distribution areas were classified in five on-site possible candelilla habitat suitability categories: none (< 19%), low (20–38%), medium (39–57%), high (58–76%) and very high (> 77%). According to the area under the curve (0.970), the models and scenarios used showed an adequate fit to project the current and future distribution of candelilla. The variable that contributed the most in the three GCMs and the two RCPs was the mean temperature of the coldest quarter with an influence of 45.7% (Jackknife test). The candelilla’s distribution area for North America was predicted as approximately 19.1 million hectares under the current conditions for the high habitat suitability; however, the projection for the next fifty years is not promising because the GCMs projected a reduction of more than 6.9 million hectares using either the conservative or extreme scenarios. The results are useful for conservation of the species in the area with vulnerable wild populations, as well as for the selection of new sites suitable for the species growth and cultivation while facing climate change.

NOTES ON A EUROPEAN WEEVIL, CEUTORHYNCHUS ASSIMILIS PAYK., RECENTLY FOUND IN THE STATE OF WASHINGTON

1936 ◽  
Vol 68 (9) ◽  
pp. 191-193 ◽  
Author(s):  
WM. W. Baker
Keyword(s):  
United States ◽  
North America ◽  
The United States ◽  
Economic Importance ◽  
The State ◽  
Ceutorhynchus Assimilis ◽  
Cabbage Seed ◽  
Seed Growing

During May, 1935, C. F. Doucette collected a few adult weevils on flower heads of mustard growing at the edge of a bulb field near Lynden. Wash. These weevils were recognized by the writer as apparently different from any of the species listed from North America, and a trip was made to Lynden on June 1, 1935, to obtain additional specimens. Specimens were also collected on mustard close to the northern limits of Bellingham, at two points between there and Lynden, north of Lynden, and in the vicinity of Nooksack, all in Watcom County. On the following day two specimens were collected on mustard at Big Lake, Skagit County. Big Lake is practically in the seed-growing section of the county, where a large portion of the cabbage seed used in the United States is produced. Weevils were determined by L. L. Buchanan as Ceutorhynchus assilmilis Paykull, and Mr. Buchanan stated that this species had not previously been reported from North America and that it appeared to be of considerable economic importance in Europe.

scholarly journals Boarding and lodging practices in early twentieth-century Scotland

2016 ◽  
Vol 31 (1) ◽  
pp. 79-100 ◽  
Author(s):  
JEFF MEEK
Keyword(s):  
Twentieth Century ◽  
North America ◽  
Working Class ◽  
Interpersonal Relationships ◽  
Crucial Role ◽  
Economic Status ◽  
Economic Importance ◽  
The Social ◽  
Economic Position ◽  
Insight Into

ABSTRACTThe social and economic position of lodgers in Europe and North America has attracted considerable scholarship, yet the financial and interpersonal relationships between lodgers and boarders and their hosts in working-class homes is somewhat underdeveloped. This article examines patterns of lodging and boarding in working-class homes in Scotland between 1861 and 1911, focusing upon multiple layers of connection between paying guests and householders. This article demonstrates that connections had national and ethnic roots, and that taking in lodgers and boarders was of prime cultural and economic importance for many. The ability to offer space played a crucial role in the social and economic status of single, separated and widowed women, and this article offers an insight into the sometimes troubled relationships between landladies and their tenants.

Notes on the Life-history and Habits of the Brown Mite, Bryobia arborea Morgan & Anderson (Acarina: Tetranychidae), on Peach in Ontario

1960 ◽  
Vol 92 (10) ◽  
pp. 775-779 ◽  
Author(s):  
D. H. C. Herne ◽  
Wm. L. Putman
Keyword(s):  
Life History ◽  
New Species ◽  
North America ◽  
Life Histories ◽  
Fruit Trees ◽  
Extensive Study ◽  
Economic Importance ◽  
Eastern North America ◽  
Closely Related Species ◽  
A New Species

The ‘clover’ mite, Bryobia praetiosa Koch, has long been known to be a complex of closely related species or biological races differing greatly in host range, life-history, and habits. Morgan and Anderson (1957) reviewed the problem and described the form occurring on fruit trees in British Columbia as a new species, B. arborea, to be known as the brown mite, and these authors (Anderson and Morgan, 1958) also published a detailed study of the life-histories and habits of this species and of the true clover mite, B. praetiosa. Although the presence of Bryobia mites on fruit trees in Eastern North America, including Ontario, has long been recognized, they have seldom received more than casual mention and no extensive study of their biology in this area appears to have been undertaken. The species has little economic importance in Ontario (Putman and Herne, 1959).

Current concepts in the epizootiology, diagnosis, and economic importance of ovine progressive pneumonia in North America: A review

1998 ◽  
Vol 27 (1) ◽  
pp. 1-17 ◽  
Author(s):  
Scott J. Brodie ◽  
Andres de la Concha-Bermejillo ◽  
Gary D. Snowder ◽  
James C. DeMartini
Keyword(s):  
North America ◽  
Economic Importance ◽  
Ovine Progressive Pneumonia

Introduced leaf beetles of the Maritime Provinces, 8: Gastrophysa polygoni Linnaeus (Coleoptera: Chrysomelidae)

Zootaxa ◽  
2009 ◽  
Vol 2047 (1) ◽  
pp. 48-62 ◽  
Author(s):  
LAURENT LESAGE ◽  
CHRISTOPHER G. MAJKA
Keyword(s):  
North America ◽  
Host Plants ◽  
Economic Importance ◽  
Maritime Provinces ◽  
Eastern Canada ◽  
Leaf Beetles ◽  
Introduction History ◽  
Biocontrol Potential ◽  
A Minor ◽  
The 19Th Century

The taxonomy, nomenclature, identification, introduction history, biology (reproduction, phenology, parasites, predators, host plants), biocontrol potential, susceptibility to pesticides, and economic importance of Gastrophysa polygoni (Linnaeus) in North America are reviewed. This information is part of continuing surveys and research on the adventive leaf beetles of Canada with particular reference to the Maritime Provinces. Known provincial records are confirmed and new locality records are reported for the widely distributed G. polygoni. The introduction timelines and dispersal of the beetle in North America are discussed. Clearly G. polygoni must have been established early in the settlement of North America because reports from the first half of the 19th century already indicated that the species was widely established and common in many locations in the northeastern United States and eastern Canada. Gastrophysa polygoni is beneficial when it feeds on weeds such as Polygonum spp, Fallopia spp, or Rumex spp. It can be a minor pest of cultivated buckwheat (Fagopyrum spp.)

Predicting landscape patterns of aspen dieback: mechanisms and knowledge gaps

2004 ◽  
Vol 34 (7) ◽  
pp. 1379-1390 ◽  
Author(s):  
Brent R Frey ◽  
Victor J Lieffers ◽  
EH (Ted) Hogg ◽  
Simon M Landhäusser
Keyword(s):  
North America ◽  
Information Needs ◽  
Economic Importance ◽  
Landscape Patterns ◽  
Knowledge Gaps ◽  
Insect Defoliation

Sudden dieback and deterioration of mature aspen stands is commonly observed throughout North America. This dieback process has tremendous ecological and economic importance, yet remains poorly understood. This paper summarizes our understanding of aspen dieback in North America, identifies potential processes that contribute to reduced vigour and dieback of aspen stands, and examines the scales (stand, ecosite, regional) at which these processes operate. Many factors including pathogens, nutrition, or successional changes may be involved in the decline of aspen vigour and thereby contribute to the dieback process. However, insect defoliation, drought, and thaw–freeze events appear to be the most likely factors initiating dieback in mature aspen stands. Further study is clearly needed to elucidate the mechanisms and landscape patterns of dieback. Information needs related to identifying processes and modeling landscape patterns of dieback are indicated.

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