Field Cage Competition Tests with a Nonirradiated Wild and an Irradiated Laboratory Strain of the Codling Moth 1

1975 ◽  
Vol 4 (1) ◽  
pp. 166-167 ◽  
Author(s):  
A. S. Robinson ◽  
M. D. Proverbs
Keyword(s):  
Laboratory Strain ◽  
Codling Moth ◽  
Field Cage

Genetic control of Delia antiqua (Meigen) (Diptera: Anthomyiidae). Sensitivity to diapause interfering with a field-cage experiment using a homozygous chromosomal translocation

1980 ◽  
Vol 70 (1) ◽  
pp. 103-111 ◽  
Author(s):  
A. S. Robinson ◽  
M. Herfst ◽  
L Vosselman
Keyword(s):  
Emerging Adults ◽  
Chromosomal Translocation ◽  
Laboratory Strain ◽  
Standard Laboratory ◽  
Delia Antiqua ◽  
Field Cage ◽  
Control Techniques ◽  
Cage Population ◽  
Translocation Karyotypes ◽  
Homozygous Strain

AbstractA translocation homozygous strain (TT) of Delia antiqua (Mg) was released into a field cage in Wageningen, The Netherlands, together with a standard laboratory strain (++). During the course of the season, the fecundity and fertility of the adults were measured together with the karyotype frequencies (TT+; T+; ++) of the F1 progeny. No selective disadvantage of the translocation karyotypes was observed. However, only four F1 adults emerged in the field cage; therefore a sample of pupae was removed from the cage, and it was shown that nearly 100% of the surviving pupae had entered diapause. This figure was confirmed from the remainder of the pupae. The fertility of eggs from the emerging adults was reduced to 54%, compared with the standard fertility of nearly 90%, but because of the diapause response of the strains used, the effect of this reduced fertility in the field-cage population could not be followed. The reasons for the change in diapause response of the laboratory strains are discussed and suggestions made as to how this could be prevented. The report highlights the importance of quality in control techniques involving translocations.

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

scholarly journals Differences in the susceptibility of codling moth populations to Cydia pomonella granulovirus in the Czech Republic

2011 ◽  
Vol 38 (No. 1) ◽  
pp. 21-26 ◽  
Author(s):  
T. Zichová ◽  
V. Falta ◽  
F. Kocourek ◽  
J. Stará
Keyword(s):  
Czech Republic ◽  
Larval Mortality ◽  
Cydia Pomonella ◽  
Laboratory Strain ◽  
Codling Moth ◽  
Wild Populations ◽  
The Czech Republic ◽  
Registration Process ◽  
Cydia Pomonella Granulovirus ◽  
Laboratory Bioassays

The Cydia pomonella granulovirus is a very important agent for the biological control of the codling moth, Cydia pomonella, in both organic and integrated apple and pear production. Three populations of Cydia pomonella originating from three separate areas of the Czech Republic were tested for their susceptibility to Cydia pomonella granulovirus in laboratory bioassays at several concentrations of Cydia pomonella granulovirus. A sensitive laboratory strain was chosen as a control. The larval mortality was checked 14 days after the infection. The mortality of Cydia pomonella larvae was similar in specimens originating from both the wild populations and the laboratory strain. Decreased susceptibility to Cydia pomonella granulovirus was demonstrated neither in samples from locality without Cydia pomonella granulovirus treatment nor from a locality experimentally treated with Cydia pomonella granulovirus for several years during the registration process. However, one population experimentally treated for more than 10 years was partially resistant to Cydia pomonella granulovirus. Based on our findings; the Cydia pomonella granulovirus biopesticides will be efficient due to the high susceptibility of field codling moth populations to Cydia pomonella granulovirus in the Czech Republic.

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.

Negative cross resistance of Spodoptera litura Fabricius population of tomato to newer molecule spinetoram

ENTOMON ◽  
2019 ◽  
Vol 44 (2) ◽  
pp. 127-132
Author(s):  
M. Visnupriya ◽  
N. Muthukrishnan
Keyword(s):  
Spodoptera Litura ◽  
Laboratory Strain ◽  
Field Population ◽  
Resistance Ratio ◽  
Cross Resistance ◽  
In Vivo Toxicity

Field population of Spodoptera litura from tomato ( resistant to the majority of the conventional insecticide molecules) were subjected to the in vivo toxicity of spinetoram 12 SC to assess whether cross resistance exists or not. Untreated larvae of both field and laboratory strains showed no mortality during 48 hours of feeding. After 48 hours of feeding on spinetoram 12 SC treated leaves, LC50s of field larvae were 0.28, 0.93, 3.71 and 7.11 ppm for the 2nd, 3rd, 4th and 5th instars of S. litura respectively. However, in the laboratory strain these values were 1.12, 5.86, 36.72 and 91.55 ppm for 2nd, 3rd, 4th and 5th instars of S. litura respectively. Resistance ratio was 0.25, 0.16, 0.10 and 0.08 for the 2nd instar up to the 5th instar of S. litura.

Sign in / Sign up

Export Citation Format

Share Document