Codling Moth: Field-Cage Mating Competitiveness of Radiosterilized Males123

1977 ◽  
Vol 70 (1) ◽  
pp. 64-65 ◽  
Author(s):  
L. D. White ◽  
M. Koslinska ◽  
Z. W. Suski
Keyword(s):  
Codling Moth ◽  
Field Cage ◽  
Mating Competitiveness

The Sterile Insect Release Method and the Importance of Thermal Conditioning Before Release - Field-Cage Experiments With Dacus-Tryoni in Spring Weather

1987 ◽  
Vol 35 (2) ◽  
pp. 197 ◽  
Author(s):  
HAC Fay ◽  
A Meats
Keyword(s):  
Target Population ◽  
Cold Weather ◽  
Large Field ◽  
Field Cage ◽  
Mating Competitiveness ◽  
Rate Of Increase ◽  
Conditioned State ◽  
Males And Females ◽  
Sterile Insect Release ◽  
Release Method

We present a rationale for the strategy of suppressing the fertility and hence the rate of increase of target populations in spring by the release of sterile insects. Insects for mass release are normally reared in warm conditions and are potentially unsuitable for use in cold weather. A comparison was made of the effectiveness of warm- and cold-conditioned sterile flies in experiments in large field-cages during three successive spring seasons. Sterile males and females, and wild males and females were released into the cages in the ratio 2:2:1:1, respectively. Warm-conditioned sterile flies survived poorly between release and mating. Their mating competitiveness was inferior to that of the wild flies, and they were relatively ineffective in reducing their fertility. Sterile flies released in a cold-conditioned state (equal to that of the wild flies), survived as well as wild flies, and suppressed their fertility to an extent which indicates that their mating competitiveness can be equal to that of the wild flies, if the weather is not too severe. The concept of total competitiveness is introduced. If competitiveness is calculated by means of the ratio of sterile to wild flies that exists at release (rather than at mating), the resulting value is a measure of the potential of the sterile flies to survive to mating age, and to mate in competition with the wild flies. This value is especially pertinent to situations such as a puparial release, when there is a delay between release and mating. In such circumstances, it is needed for calculating the required ratio of sterile to wild insects to achieve the desired reduction of fertility (and thus rate of increase) in the target population.

Mating Competitiveness of Culex tarsalis1 Double Translocation Heterozygote Males in Laboratory and Field Cage Trials3

1977 ◽  
Vol 70 (6) ◽  
pp. 849-854 ◽  
Author(s):  
H. A. Terwedow ◽  
S. M. Asman ◽  
P. T. McDonald ◽  
R. L. Nelson ◽  
W. C. Reeves
Keyword(s):  
Field Cage ◽  
Translocation Heterozygote ◽  
Mating Competitiveness

Diapause improves springtime mating competitiveness of male codling moth mass-reared for a sterile insect programme

2006 ◽  
Vol 120 (2) ◽  
pp. 161-166 ◽  
Author(s):  
Gary J.R. Judd ◽  
Sarah Cockburn ◽  
Chelsea Eby ◽  
Mark G.T. Gardiner ◽  
Susan Wood
Keyword(s):  
Codling Moth ◽  
Mating Competitiveness

scholarly journals Developing Field Cage Tests to Measure Mating Competitiveness of Sterile Light Brown Apple Moths (Lepidoptera: Tortricidae) in Western Australia

2016 ◽  
Vol 99 (sp1) ◽  
pp. 138-145 ◽  
Author(s):  
Bill Woods ◽  
Donald McInnis ◽  
Ernie Steiner ◽  
Alven Soopaya ◽  
Jeremy Lindsey ◽  
...  
Keyword(s):  
Western Australia ◽  
Field Cage ◽  
Mating Competitiveness

SUPPRESSION OF CODLING MOTH, LASPEYRESIA POMONELLA (LEPIDOPTERA: OLETHREUTIDAE), BY RELEASE OF STERILE AND PARTIALLY STERILE MOTHS

1978 ◽  
Vol 110 (10) ◽  
pp. 1095-1102 ◽  
Author(s):  
M.D. Proverbs ◽  
J.R. Newton ◽  
D.M. Logan
Keyword(s):  
British Columbia ◽  
Codling Moth ◽  
Apple Orchard ◽  
Field Cage ◽  
Small Areas ◽  
Azinphos Methyl ◽  
Laspeyresia Pomonella ◽  
Insecticide Sprays ◽  
Apple Fruits ◽  
Made In

AbstractBecause laboratory and field cage experiments had shown that partially sterile (25 krad dose) male codling moths were sexually more competitive than sterile (40 krad) ones, a study was made in a British Columbia orchard in 1970 to determine whether release of 25 krad moths of mixed sexes would suppress this pest more effectively than release of 40 krad moths. Approximately 75,000 moths/ha were released from 24 April to 25 September for each dose level. In the 25 krad moth release plot, the percentage of apple fruits damaged by this pest at harvest was reduced from 0.21 in 1969 to 0.08 in 1970, whereas in the 40 krad plot damage was reduced from 0.04 in 1969 to 0.02 in 1970.Release of 25 krad moths was also compared with insecticide sprays for codling moth suppression in two small areas at Cawston and Olalla, B.C. At Cawston, the percentage of apples damaged at harvest was reduced from 1.0 in 1969, after three sprays of phosalone, to 0.1 in 1970 after release of irradiated insects. In contrast, per cent damage in a nearby apple orchard, sprayed twice with azinphos-methyl in 1969 and 1970, increased from 2.0 in 1969 to 8.1 in 1970. At Olalla, per cent damage was about the same (0.5) in 1969, after three phosalone sprays, as in 1970 (0.6) after release of irradiated insects. In a neighboring apple orchard, sprayed twice with phosalone in 1969 and 1970, per cent damage was about the same (1.0–1.2) each year.

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