THE DISTRIBUTION OF THE MORMON CRICKET, ANABRUS SIMPLEX HALDEMAN, IN SASKATCHEWAN

1939 ◽  
Vol 71 (9) ◽  
pp. 202-204
Author(s):  
L. C. Paul ◽  
W. B. Fox
Keyword(s):  
The Past ◽  
Mormon Cricket ◽  
Anabrus Simplex ◽  
Abundance And Distribution

Within the past few years an increase both in abundance and distribution of the Mormon cricket has occurred in Saskatchewan. This was especially conspicuous in 1938.

Estimation of the composition of the cuticular wax of the Mormon cricket, Anabrus simplex Hald.

1960 ◽  
Vol 5 (1) ◽  
pp. 47-60 ◽  
Author(s):  
G. Baker ◽  
J.H. Pepperz ◽  
L.H. Johnson ◽  
E. Hastings
Keyword(s):  
Cuticular Wax ◽  
Mormon Cricket ◽  
Anabrus Simplex

The Variations of the Abundance and Distribution Pattern of Calanus sinicus Brodsky in the Western South Yellow Sea in Spring and Summer

2012 ◽  
Vol 573-574 ◽  
pp. 1145-1155
Author(s):  
Xiao Wang ◽  
Zong Ling Wang
Keyword(s):  
Distribution Pattern ◽  
Yellow Sea ◽  
Water Mass ◽  
Cold Water ◽  
South Yellow Sea ◽  
Calanus Sinicus ◽  
Yellow Sea Warm Current ◽  
The Past ◽  
Abundance And Distribution ◽  
Hydrological Parameter

Multidisciplinary comprehensive investigations were conducted in the western South Yellow Sea in the summer, 2006 and spring, 2007. The abundance and distribution pattern of a dominant zooplankton species, Calanus sinicus, and its relationship with the environmental conditions are analyzed. The data of C. sinicus and hydrological parameter in the spring and summer of 1959 are used to compare the variations of C. sinicus and hydrographical conditions in the past 50 years. Results show that the abundance of C. sinicus was significantly higher in 2006 and 2007 than that in 1959 which may be correlate with both the bottom-up and top-down effects; the distribution pattern in the spring of the two years was similar, on the contrary, However, the hydrographical characteristics were conspicuously different between the two springs, for example, the coverage and strength of the Qingdao Cold Water Mass, the penetrating pathway of Yellow Sea Warm Current and the distribution pattern of the oceanic front. Correspondingly, the distribution pattern of C. sinicus in the summer of the two years showed great differences. Thus, it is suggested that the distribution pattern of C. sinicus in summer might be influenced by the hydrographical characteristics in spring, which probably further affects the present of some economically important fishes which fed on C. sinicus.

scholarly journals Fractional Woody Cover Mapping of Texas Savanna at Landsat Scale

Land ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 9 ◽  
Author(s):  
Xuebin Yang ◽  
Kelley A. Crews
Keyword(s):  
Woody Plants ◽  
Woody Plant ◽  
Training Data ◽  
Tree Cover ◽  
Mean Annual Precipitation ◽  
Plant Abundance ◽  
The Past ◽  
Woody Cover ◽  
Continuous Fields ◽  
Abundance And Distribution

Texas savanna experienced substantial woody plant encroachment during the past several decades, resulting in habitat fragmentation and species loss. A detailed map of woody plant abundance and distribution in this area is critically needed for management purpose. This study endeavors to map the fractional woody cover of Texas savanna at Landsat scale (30 m) in an affordable way. The top of atmosphere reflectance, thermal bands, and NDVI layer of Web-Enabled Landsat Data (WELD) of 2012 were used as predictors, together with mean annual precipitation. Classification and Regression Trees (CART) were calibrated against training data of a whole range of fractional woody cover, which were derived from 1-m resolution digital orthophotos of 2012. Validation indicates a reasonable pixel level accuracy of the result fractional woody cover map, with a R-squared value of 0.45. Moreover, the result map clearly depicts the distribution of woody plants across the study area, as reflected by the orthophotos. Furthermore, this new map proves an improvement over the existing Landsat Vegetation Continuous Fields (VCF) tree cover product. The method developed here, combining remote sensing and statistical techniques, can contribute to savanna management through revealing the abundance and distribution of woody plants.

Virulence of the insect-pathogenic fungi Metarhizium spp. to Mormon crickets, Anabrus simplex (Orthoptera: Tettigoniidae)

2021 ◽  
pp. 1-8
Author(s):  
Drauzio E. N. Rangel ◽  
Helen G. Bignayan ◽  
Hernani G. Golez ◽  
Chad A. Keyser ◽  
Edward W. Evans ◽  
...  
Keyword(s):  
Pathogenic Fungi ◽  
Field Application ◽  
Control Measures ◽  
Metarhizium Robertsii ◽  
Metarhizium Acridum ◽  
Threatened And Endangered Species ◽  
Insect Pathogenic Fungi ◽  
The Usa ◽  
Mormon Cricket ◽  
Anabrus Simplex

Abstract The Mormon cricket (MC), Anabrus simplex Haldeman, 1852 (Orthoptera: Tettigoniidae), has a long and negative history with agriculture in Utah and other western states of the USA. Most A. simplex populations migrate in large groups, and their feeding can cause significant damage to forage plants and cultivated crops. Chemical pesticides are often applied, but some settings (e.g. habitats of threatened and endangered species) call for non-chemical control measures. Studies in Africa, South America, and Australia have assessed certain isolates of Metarhizium acridum as very promising pathogens for Orthoptera: Acrididae (locust) biocontrol. In the current study, two isolates of Metarhizium robertsii, one isolate of Metarhizium brunneum, one isolate of Metarhizium guizhouense, and three isolates of M. acridum were tested for infectivity to MC nymphs and adults of either sex. Based on the speed of mortality, M. robertsii (ARSEF 23 and ARSEF 2575) and M. brunneum (ARSEF 7711) were the most virulent to instars 2 to 5 MC nymphs. M. guizhouense (ARSEF 7847) from Arizona was intermediate and the M. acridum isolates (ARSEF 324, 3341, and 3609) were the slowest killers. ARSEF 2575 was also the most virulent to instar 6 and 7 nymphs and adults of MC. All of the isolates at the conidial concentration of 1 × 107 conidia ml−1 induced approximately 100% mortality by 6 days post application of fungal conidia. In conclusion, isolates ARSEF 23, ARSEF 2575, and ARSEF 7711 acted most rapidly to kill MC under laboratory conditions. The M. acridum isolates, however, have much higher tolerance to heat and UV-B radiation, which may be critical to their successful use in field application.

scholarly journals Immune Response of Mormon Crickets That Survived Infection byBeauveria bassiana

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Robert B. Srygley ◽  
Stefan T. Jaronski
Keyword(s):  
Biological Control ◽  
Immune Response ◽  
Beauveria Bassiana ◽  
Sunflower Oil ◽  
Entomopathogenic Fungus ◽  
Biological Control Agent ◽  
Control Agent ◽  
Mormon Cricket ◽  
Anabrus Simplex ◽  
Dose Dependent

Beauveria bassiana(Fungi: Ascomycota) is an entomopathogenic fungus that serves as a biological control agent of Mormon cricketsAnabrus simplexHaldeman (Orthoptera: Tettigoniidae) and other grasshopper pests. To measure the dose-dependent response of Mormon crickets to fungal attack, we appliedB. bassianastrain GHA topically to adults using doses of 5.13 ×  to 1.75 ×  conidia in sunflower oil, with oil only as a control. After three weeks, we assessed the survivors' hemolymph for fungal cells, active phenoloxidase (PO), and lysozyme. Mortality increased and body mass of survivors decreased with conidial dose. survivors' PO activity was elevated to the same level independent of dose. Those with fungal cells visible in their hemolymph did not differ in PO activity from those with clear hemolymph. We conclude that circulating PO may be an important enzymatic defense againstBeauveriainfection and that it is associated with attempted clearing ofBeauveriablastospores and hyphae from Mormon cricket hemolymph.

Mormon Cricket, Anabrus simplex Haldeman (Orthoptera: Tettigoniidae)

2008 ◽  
pp. 2463-2466
Author(s):  
George Hangay ◽  
Susan V. Gruner ◽  
F. W. Howard ◽  
John L. Capinera ◽  
Eugene J. Gerberg ◽  
...  
Keyword(s):  
Mormon Cricket ◽  
Anabrus Simplex
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