Effect of Temperature, Relative Humidity, and Free Water on the Number and Normalcy of Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae) Emerging from Eggs of Heliothis zea (Boddie) (Lepidoptera: Noctuidae)1

1988 ◽  
Vol 17 (3) ◽  
pp. 470-475 ◽  
Author(s):  
H. R. Gross
Keyword(s):  
Relative Humidity ◽  
Heliothis Zea ◽  
Free Water ◽  
Effect Of Temperature ◽  
Trichogramma Pretiosum ◽  
Lepidoptera Noctuidae

FIELD RELEASES OF TRICHOGRAMMA PRETIOSUM RILEY (HYMENOPTERA: TRICHOGRAMMATIDAE) FOR SUPPRESSION OF CORN EARWORM, HELIOTHIS ZEA (BODDIE) (LEPIDOPTERA: NOCTUIDAE), EGG POPULATIONS ON SWEET CORN IN NOVA SCOTIA

1990 ◽  
Vol 122 (6) ◽  
pp. 1259-1266 ◽  
Author(s):  
Kenneth A. Neil ◽  
H.B. Specht
Keyword(s):  
Nova Scotia ◽  
Sweet Corn ◽  
Heliothis Zea ◽  
Corn Earworm ◽  
Effective Control ◽  
Trichogramma Pretiosum ◽  
Chemical Treatments ◽  
Trap Catches ◽  
Lepidoptera Noctuidae ◽  
Spray Applications

AbstractTrichogramma pretiosum Riley was released in the field for suppression of corn earworm, Heliothis zea (Boddie), egg populations in Nova Scotia in 1985–1987. Trichogramma pretiosum reduced com earworm populations 7.4–53% compared with chemical treatments reductions of 19–100%. Trichogramma pretiosum were not as effective as insecticides, especially when populations of the corn earworm were low (less than five larvae per 1000 ears). Timing of T. pretiosum releases and spray applications were determined by blacklight trap catches and were considered critical for effective control.

Pollen as an Indicator of Long-distance Movement of Heliothis zea (Lepidoptera: Noctuidae)

1987 ◽  
Vol 16 (5) ◽  
pp. 1148-1151 ◽  
Author(s):  
W. H. Hendrix ◽  
T. F. Mueller ◽  
J. R. Phillips ◽  
O. K. Davis
Keyword(s):  
Heliothis Zea ◽  
Long Distance ◽  
Long Distance Movement ◽  
Lepidoptera Noctuidae

On the Use of Monolayers to Reduce Evaporation From Stationary Water Pools

1993 ◽  
Vol 115 (1) ◽  
pp. 209-214 ◽  
Author(s):  
T. D. Tang ◽  
M. T. Pauken ◽  
S. M. Jeter ◽  
S. I. Abdel-Khalik
Keyword(s):  
Experimental Investigation ◽  
Relative Humidity ◽  
Water Surface ◽  
Surface Film ◽  
Free Water ◽  
Vapor Concentration ◽  
Controlled Environment ◽  
Stearyl Alcohol ◽  
Water Pool ◽  
Evaporation Suppression

An experimental investigation has been conducted to quantify the extent by which monolayers of fatty alcohols can reduce evaporation from a deep stationary water pool within a controlled environment. Octadecanol (stearyl alcohol), C17H35–CH2–OH, was chosen as the surface film and ethanol was selected to be the spreading agent. Evaporation suppression of 60 percent was achieved at a water temperature of 25°C with an air temperature of 20°C and a relative humidity of 70 percent. The experimental techniques and data have been validated by comparing the measured evaporation rates for film-free water with earlier data published by other investigators. Data for the evaporation rates of water covered by octadecanol films were correlated as a function of vapor concentration differences between the water surface and air.

scholarly journals Biological parameters of three Trichogramma pretiosum strains (Riley, 1879) (Hymenoptera: Trichogrammatidae) on eggs Helicoverpa armigera (Hübner, 1805) (Lepidoptera: Noctuidae)

2017 ◽  
Vol 39 (3) ◽  
pp. 349 ◽  
Author(s):  
Gabriel dos Santos Carvalho ◽  
Luciana Barbosa Silva ◽  
Maisa Sousa Veras ◽  
Eliane Carneiro Bueno dos Santos ◽  
Mayra Layra dos Santos Almeida ◽  
...  
Keyword(s):  
Helicoverpa Armigera ◽  
Biological Parameters ◽  
Trichogramma Pretiosum ◽  
Helicoverpa Armígera ◽  
Lepidoptera Noctuidae

scholarly journals Effect of temperature and relative humidity on the stability of infectious porcine reproductive and respiratory syndrome virus in aerosols

2007 ◽  
Vol 38 (1) ◽  
pp. 81-93 ◽  
Author(s):  
Joseph Hermann ◽  
Steve Hoff ◽  
Claudia Muñoz-Zanzi ◽  
Kyoung-Jin Yoon ◽  
Michael Roof ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Effect Of Temperature ◽  
Respiratory Syndrome Virus ◽  
The Stability
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