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
1990 ◽  
Vol 122 (6) ◽  
pp. 1259-1266 ◽  
Author(s):  
Kenneth A. Neil ◽  
H.B. Specht

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.


1987 ◽  
Vol 16 (5) ◽  
pp. 1148-1151 ◽  
Author(s):  
W. H. Hendrix ◽  
T. F. Mueller ◽  
J. R. Phillips ◽  
O. K. Davis

1993 ◽  
Vol 115 (1) ◽  
pp. 209-214 ◽  
Author(s):  
T. D. Tang ◽  
M. T. Pauken ◽  
S. M. Jeter ◽  
S. I. Abdel-Khalik

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.


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 ◽  
...  

2007 ◽  
Vol 38 (1) ◽  
pp. 81-93 ◽  
Author(s):  
Joseph Hermann ◽  
Steve Hoff ◽  
Claudia Muñoz-Zanzi ◽  
Kyoung-Jin Yoon ◽  
Michael Roof ◽  
...  

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