scholarly journals Performance of the Natural Mortality Factors of Aphis gossypii (Hemiptera: Aphididae) as a Function of Cotton Plant Variety and Phenology

2018 ◽  
Vol 47 (2) ◽  
pp. 440-447 ◽  
Author(s):  
António Chamuene ◽  
Tamíris Alves Araújo ◽  
Gerson Silva ◽  
Thiago Leandro Costa ◽  
Paulo Geraldo Berger ◽  
...  
Keyword(s):  
Cotton Plant ◽  
Aphis Gossypii ◽  
Natural Mortality ◽  
Mortality Factors ◽  
Plant Variety

Investigating the Natural Mortality of Aphis gossypii (Hemiptera: Aphididae) on Cotton Crops in Tropical Regions Using Ecological Life Tables

2019 ◽  
Vol 49 (1) ◽  
pp. 66-72
Author(s):  
António Chamuene ◽  
Tamíris Alves De Araújo ◽  
Mayara Cristina Lopes ◽  
Renata Ramos Pereira ◽  
Paulo Geraldo Berger ◽  
...  
Keyword(s):  
Integrated Pest Management ◽  
Pest Management ◽  
Chemical Control ◽  
Harmonia Axyridis ◽  
Aphis Gossypii ◽  
Natural Mortality ◽  
Mortality Factors ◽  
Phenological Stages ◽  
Tropical Regions ◽  
Abiotic And Biotic Factors

Abstract Studies on the natural factors contributing to pest regulation are fundamental to developing efficient integrated pest management programs. Chemical control is the main management method used for pests [e.g., Aphis gossypii (Glover)]. The studies of pest management with chemical control provide information that can be incorporated into integrated pest management programs to promote more sustainable pest control approaches. Here, we report the critical stages of A. gossypii and its abiotic and biotic natural mortality factors in cotton crops as a function of plant phenology using a life table. The critical stages of A. gossypii were the first and fourth instars. Together, the abiotic and biotic factors caused 94.31% of the mortality in the A. gossypii populations in cotton crops with plants in the vegetative, flowering, and fruiting stages. The key mortality factors were rainfall and predation. Syrphidae Allograpta exotica (Wiedemann) (Diptera: Syrphidae) and Chrysopidae Chrysoperla externa (Hagen) (Neuroptera: Chrysopidae) larvae, many Coccinellidae species Cycloneda sanguinea (L.) (Coleoptera: Coccinellidae), Eriopsis connexa (Germar) (Coleoptera: Coccinellidae), Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae), Hippodamia convergens (Guérin-Meneville) (Coleoptera: Coccinellidae), Scymnus rubicundus (Erichson) (Coleoptera: Coccinellidae) and Stethorus punctillum (Weise) (Coleoptera: Coccinellidae), one Anthocoridae species Orius insidiosus (Say) (Hemiptera: Anthocoridae), and individuals from the Araneidae family were responsible for the predation of A. gossypii. The results obtained in this study provide support for the idea that efforts to preserve natural enemies (e.g., predators) and rainfall monitoring should be adapted due to their importance for the regulation of A. gossypii populations in all the phenological stages of cotton in tropical regions.

Mortality of Cocoons of the Larch Sawfly, Pristiphora erichsonii (Htg.), in Relation to Distance from Small-Mammal Tunnels

1959 ◽  
Vol 91 (9) ◽  
pp. 535-542 ◽  
Author(s):  
C. H. Buckner
Keyword(s):  
Small Mammals ◽  
Small Mammal ◽  
Natural Mortality ◽  
Mortality Factors ◽  
Forest Reserve ◽  
Pristiphora Erichsonii ◽  
Larch Sawfly ◽  
The Relationship

The relationship between the fate of cocoons of the larch sawfly, Pristiphora erichsonii (Htg.), and distance from small-mammal tunnels was studied during 1958 in the Whiteshell Forest Reserve of eastern Manitoba. The objects were to determine the distance that small mammals can detect cocoons and to observe possible effects of the interactions of small-mammal predation and other natural mortality factors of the insect. Additional analyses of the data provided information on the behaviour of the predators and the ecology of the prey insect.

Spatiotemporal Dynamics and Natural Mortality Factors of Myzus persicae (Sulzer) (Hemiptera: Aphididae) in Bell Pepper Crops

2020 ◽  
Vol 49 (3) ◽  
pp. 445-455
Author(s):  
J R S Soares ◽  
J da Silva Paes ◽  
V C R de Araújo ◽  
T A de Araújo ◽  
R S Ramos ◽  
...  
Keyword(s):  
Myzus Persicae ◽  
Spatiotemporal Dynamics ◽  
Bell Pepper ◽  
Natural Mortality ◽  
Mortality Factors

Post-infection changes in lipids of the roots of a cotton plant variety moderately resistant to Verticillium dahliae

1989 ◽  
Vol 25 (1) ◽  
pp. 50-54 ◽  
Author(s):  
S. G. Yunusova ◽  
S. D. Gusakova ◽  
Kh. T. Mirzaazimova ◽  
A. I. Glushenkova
Keyword(s):  
Cotton Plant ◽  
Verticillium Dahliae ◽  
Post Infection ◽  
Plant Variety ◽  
Moderately Resistant

DISPERSAL AND ESTABLISHMENT OF PLEOLOPHUS BASIZONUS (HYMENOPTERA: ICHNEUMONIDAE)

1970 ◽  
Vol 102 (9) ◽  
pp. 1102-1111 ◽  
Author(s):  
Peter W. Price
Keyword(s):  
Host Density ◽  
Jack Pine ◽  
Population Estimates ◽  
Natural Mortality ◽  
Mortality Factors ◽  
River Watershed ◽  
Parasitoid Complex ◽  
Important Addition ◽  
The Mean ◽  
Absolute Population

AbstractPleolophus basizonus (Gravenhorst) is a parasitoid from Europe introduced in Canada and liberated between 1939 and 1949 to supplement natural mortality factors of sawfly populations. Three recoveries reported in the literature show that the parasitoid has dispersed 81 km at 4.3 km per year in Ontario, between 109 and 161 km at 4.5 and 5.6 km per year in Quebec, and 172 km at 8.6 km per year in Michigan. Dispersal occurs by walking, possibly by short flights and by water while the parasitoid is within the host cocoon. Female parasitoids do not fly unless disturbed and dispersal by water cannot account for their movement in Quebec. In observation trays, the mean rate of travel on the ground by female parasitoids was 20.9 cm per minute. This speed is sufficient to account for the rates of dispersal recorded in the field. The parasitoid was present in every jack pine stand sampled between 1965 and 1968 in the western part of the St. Maurice River watershed in Quebec. The most abundant host was Neodiprion swainei Middleton. Absolute population estimates indicate that the parasitoid responds positively to host density and that it is an important addition to the native parasitoid complex.

NOTES ON THE BIOLOGY OF TETROPIUM PARVULUM (COLEOPTERA: CERAMBYCIDAE) IN ALBERTA

1973 ◽  
Vol 105 (5) ◽  
pp. 757-760 ◽  
Author(s):  
A. G. Raske
Keyword(s):  
Life Cycle ◽  
Early Summer ◽  
Natural Mortality ◽  
Mortality Factors ◽  
Excess Heat ◽  
Engelmann Spruce ◽  
Wood Borer

AbstractThe wood borer Tetropium parvulum Casey is an economically important borer of white and engelmann spruce logs in Alberta. It has a 1-year life cycle. The adults emerge in early summer, the larvae mature by September, overwinter in L-shaped galleries, and pupate in the spring. The L-shaped galleries penetrate the wood to an average of 25–35 mm. Four natural mortality factors were: a suspect disease, the parasite Rhimphoctona alaskensis (Ashmead), excess heat, and woodpeckers. Of these, the suspect disease was the most evident, killing 57% of the mature larvae in one sample.

Post-infectional changes in the phospholipids of the leaves of a cotton plant variety resistant toVerticillium dahliae

1997 ◽  
Vol 33 (2) ◽  
pp. 156-161 ◽  
Author(s):  
Kh. T. Mirzaazimova ◽  
S. D. Gusakova ◽  
A. I. Glushenkova
Keyword(s):  
Cotton Plant ◽  
Plant Variety

scholarly journals Natural mortality factors of tomato leafminer Tuta absoluta in open-field tomato crops in South America

2018 ◽  
Vol 75 (3) ◽  
pp. 736-743 ◽  
Author(s):  
Leandro Bacci ◽  
Ézio M Silva ◽  
Gerson A Silva ◽  
Laércio J Silva ◽  
Jander F Rosado ◽  
...  
Keyword(s):  
South America ◽  
Open Field ◽  
Tuta Absoluta ◽  
Natural Mortality ◽  
Mortality Factors ◽  
Tomato Leafminer
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