scholarly journals Avoidance of Wolf Spiders (Araneae: Lycosidae) by Striped Cucumber Beetles (Coleoptera: Chrysomelidae): Laboratory and Field Studies

2003 ◽  
Vol 32 (3) ◽  
pp. 633-640 ◽  
Author(s):  
Jennifer L. Williams ◽  
David H. Wise
Keyword(s):  
Field Studies ◽  
Wolf Spiders ◽  
Cucumber Beetles

Consumptive and non‐consumptive effects of wolf spiders on cucumber beetles and cucumber plant damage

2020 ◽  
Vol 178 (1) ◽  
pp. 109-120
Author(s):  
Hanna M. Kahl ◽  
Alan W. Leslie ◽  
Cerruti R. R. Hooks
Keyword(s):  
Cucumber Plant ◽  
Wolf Spiders ◽  
Plant Damage ◽  
Cucumber Beetles

Cannibalism and density-dependent mortality in the wolf spider Pardosa milvina (Araneae: Lycosidae)

2003 ◽  
Vol 81 (8) ◽  
pp. 1293-1297 ◽  
Author(s):  
Christopher M Buddle ◽  
Sean E Walker ◽  
Ann L Rypstra
Keyword(s):  
Population Regulation ◽  
Wolf Spider ◽  
Field Studies ◽  
Agricultural Fields ◽  
Eastern North America ◽  
Wolf Spiders ◽  
Conspecific Density ◽  
Pardosa Milvina ◽  
Density Dependent Mortality ◽  
Dependent Mortality

Cannibalism is an important regulating mechanism in many terrestrial and aquatic arthropod communities. Spider ecologists have suggested that cannibalism with wolf spiders (Araneae: Lycosidae) in the genera Schizocosa and Pardosa is common and can act in population regulation. This hypothesis was tested with the species Pardosa milvina (Hentz), a small wolf spider that shows high densities in disturbance-driven ecosystems, including agricultural fields, throughout eastern North America. Under laboratory conditions, cannibalism was more common between pairs of P. milvina with the greatest differences in both mass and size. Field studies, in which we stocked natural densities, 2× natural densities, and 4× natural densities of P. milvina in enclosures placed in soybean fields, revealed that survival was lowest when conspecific density was highest, and larger individuals prevailed under high-density conditions. Thus, cannibalism likely plays an important role in governing populations of P. milvina, and the generality about the prevalence and importance of cannibalism with wolf spiders is supported.

scholarly journals Differential Occurrence of Bacterial Wilt in Muskmelon Due to Preferential Striped Cucumber Beetle Feeding

HortScience ◽  
1995 ◽  
Vol 30 (5) ◽  
pp. 1043-1045 ◽  
Author(s):  
Gerald E. Brust ◽  
Karen K. Rane
Keyword(s):  
Bacterial Wilt ◽  
Cucumis Melo ◽  
Field Studies ◽  
Causal Agent ◽  
The Other ◽  
Feeding Damage ◽  
Selective Feeding ◽  
Cucumber Beetles ◽  
Cucumber Beetle ◽  
Striped Cucumber Beetle

Ten muskmelon (Cucumis melo L.) cultivars were tested for their susceptibility to bacterial wilt, caused by Erwinia trucheiphila (Smith) Bergey, Harrison, Breed, Hammer and Huntoon and vectored by the striped cucumber beetle Acalymma vittatum (F). `Superstar', `Rising Star', `Pulsar', `Caravelle', `Cordele', `Legend', `Makdimon', `Galia', `Rocky Sweet', and `Passport' were used in field studies to determine the number of striped cucumber beetles, feeding damage, and incidence of bacterial wilt. `Makdimon' and `Rocky Sweet' hosted significantly more beetles than the other cultivars. These two cultivars and `Legend' and `Cordele' had much more feeding damage and a significantly higher incidence of bacterial wilt than the others. A greenhouse experiment was conducted with seven of the cultivars to test their susceptibility to bacterial wilt when directly inoculated with the causal agent. All cultivars were equally susceptible to the disease when it was introduced directly into the plant. Selective feeding by striped cucumber beetles was probably most responsible for `Makdimon', `Rocky Sweet', `Legend', and `Cordele' having greater incidences of bacterial wilt than the other cultivars.

Field studies of growth, reproduction, and mortality in the burrowing wolf spider Geolycosa domifex (Hancock)

1978 ◽  
Vol 56 (9) ◽  
pp. 2037-2049 ◽  
Author(s):  
Donald J. McQueen
Keyword(s):  
Life History ◽  
Gene Flow ◽  
Wolf Spider ◽  
Field Studies ◽  
Wolf Spiders ◽  
Original Cohort ◽  
The Third ◽  
History Of

A population of burrowing wolf spiders (Geolycosa domifex (Hancock)) was studied near Toronto, Canada, from 1974 to 1977. By following the life history of individuals in marked burrows, it was found that females produce one brood when they are 3 years old. Juveniles leave their mothers during July and August, after which they search for suitable burrow sites, establish burrows, and overwinter. During this period approximately 85% of the juveniles die and the average burrow diameter increases from 1 mm in August to 2–3 mm in October. In the second summer approximately 9% of the original cohort die and the average burrow diameter is 7 mm when the remaining individuals overwinter. In the third summer 4–5% of the original cohort die and burrow diameters average 13 mm when the remaining individuals overwinter. In the fourth summer the remaining 1 or 2% of the original cohort reproduce and more than 99% of these are killed by acrocerid flies (Pterodontia flavipes Grey) and pompilid wasps (Anoplius relativus (Fox)). Because < 0.008% of the original cohort survive to reproduce in their 4th year of life, three separate cohorts occupy the same habitat with little (< 1%) gene flow between them.

Empty visual field studies: Some effects of corrective lenses, filters, and structure.

1964 ◽  
Author(s):  
Milton S. Katz ◽  
Paul A. Cirincione ◽  
William Metlay
Keyword(s):  
Visual Field ◽  
Field Studies

Vocal signaling among male northern elephant seals: Behavioral field studies of honesty vs. associative learning

2012 ◽  
Author(s):  
Colleen Reichmuth ◽  
Caroline Casey ◽  
Isabelle Charrier ◽  
Nicolas Mathevon ◽  
Brandon Southall
Keyword(s):  
Associative Learning ◽  
Field Studies ◽  
Elephant Seals ◽  
Northern Elephant Seals ◽  
Vocal Signaling

Penggunaan Media Pembelajaran Berbasis Android untuk Meningkatkan Hasil Belajar Kognitif Siswa

2019 ◽  
Vol 5 (2) ◽  
pp. 104-111
Author(s):  
Dian Puspita Eka Putri
Keyword(s):  
High School Students ◽  
Learning Outcomes ◽  
Multimedia Learning ◽  
Cognitive Learning ◽  
Field Studies ◽  
Research Subjects ◽  
School Students ◽  
Increase Student Achievement ◽  
Post Test ◽  
Test Result

This study aims to review  the effectiveness of using android-based multimedia learning  to improve achievement cognitive learning outcome of students. The research method is the analysis of field studies. The focus in this research is Multimedia which can influence cognitive learning outcomes of students. data obtained in this study from the literature and direct field observations. The research subjects were high school students in Yogyakarta. The result of analysis and discussion of research indicate that there is the influence of multimedia learning to increase student achievement, which is indicated by increasing post-test result  than before  not using multimedia learning. Posttest value is greater than pretest.

Ligand Field Studies on the Reinecke-Type Complexes with Aniline and Benzylamine

1971 ◽  
Vol 74 (1_2) ◽  
pp. 11-16 ◽  
Author(s):  
I. Gănescu ◽  
Margareta Teodorescu ◽  
C. I. Lepădatu
Keyword(s):  
Field Studies ◽  
Ligand Field
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