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Now showing items 31-40 of 63
Natural mortality of bollworm in northern Texas Blacklands cotton
(Texas A&M University, 1998)
To better understand the elects of natural mortality phics. on bookworm, Helicoverpa zea (Boddie), in short season cotton not receiving in-season insecticide applications, population data were collected for bookworm and ...
Overwintering survival and role of moisture in diapause termination and subsequent emergence of sorghum midge, (Diptera: Cecidomyiidae)
(Texas A&M University, 1995)
Time of emergence from overwintering and abundance of sorghum midge, Stenodiplosis sorghicola (Coquillett), that initiate the first spring generation dictate the seasonal abundance and subsequent severity of damage the ...
Selective broadcast of fenoxycarb bait on fire ant infested prairie: effect on native ant community
(Texas A&M University, 1994)
This research describes the effect of a fire ant (Solenopsis invicta Buren) infestation on the ant community of two north Texas blackland prairies, and the effect on the ant community when a bait formulation of the insect ...
Biosystematics of Encarsia pergandiella and Encarsia tabacivora: two cryptic species of whitefly parasitoids (Hymenoptera: Aphelinidae)
(Texas A&M University, 1996)
Field sampling for whitefly parasitoids in south Texas revealed two cryptic forms (light and dark) of Encarsia, both of which appeared to be similar to Encarsia pergandiella. In addition to differences in coloration, minute ...
Effects of sublethal methoprene dosages on egg rafts and reproductive tracts of female Culex quinquefasciatus say (Diptera: Culicidae)
(Texas A&M University, 1995)
Examination of egg rafts from Cx. quinquefasciatus using electron microscopy revealed that the surface of individual eggs is made up of a series of cone-like tubercles surrounded by a mesh network of tubercle extensions. ...
Evaluation of the ability of subterranean termites (Isoptera: Rhinotermitidae) to differentiate between termiticide treated and untreated soils in laboratory tests
(Texas A&M University, 1997)
The effect of untreated gaps within the chemical barrier was determined for permethrin, cypermethrin, fenvalerate, chlorpyrifos and imadacloprid at the termiticide concentrations of 1000 ppm, 500 ppm, and 100 ppm. Minimum ...
Natural control of Helicoverpa zea (Boddie) in Trans-Pecos cotton
(Texas A&M University, 1998)
During the summers of 1996 and 1997 Helicoverpa zea aphics. (Boddie) life stages were monitored in insedicide-free cotton, Gossypium hirsutum L., in the Trans-pecos physiogeographic region of Texas. zea in each of the two ...
Toxicity and histopathological effects of CGA-255'728 on different stages of the cat flea, Ctenocephalides felis (Bouche) (Siphonaptera:Pulicidae)
(Texas A&M University, 1998)
Not available
Surface activity of the red imported fire ant Solenopsis invicta Buren (Hymenoptera:Formicidae), in polygyne infested areas of Brazos Co., Texas
(Texas A&M University, 1996)
A method, introduced here as the Multiple Stick Array (MSA), was devised to calculate surface densities of Solenopsis iniicta scouts over time and space. Four sub arrays of six sticks each were deposited on the substrate ...
Chemical mediation of male mate location behavior in the parasitoid Cardiochiles nigriceps (Hymenoptera: Braconidae)
(Texas A&M University, 1992)
Not available