scholarly journals Effect of gamma radiation on the male sterility and other quality parameters of peach fruit fly, Bactrocera zonata (Saunders) (Diptera: Tephritidae)

2011 ◽  
Vol 38 (No. 2) ◽  
pp. 54-62 ◽  
Author(s):  
M.F. Mahmoud ◽  
M. Barta
Keyword(s):  
Sterile Insect Technique ◽  
Adult Emergence ◽  
Fruit Fly ◽  
Considerable Effect ◽  
Quality Parameters ◽  
Female Fecundity ◽  
European Continent ◽  
Air Atmosphere ◽  
Bactrocera Zonata ◽  
Insignificant Difference

Bactrocera zonata, a serious pest of fruits in many parts of the world, has recently been recorded in Northern Africa. Even though it has not been introduced to the European continent yet, a strong emphasis is being placed on developing effective measures to suppress this pest and to prevent it from establishing in neighbouring European countries. The sterile insect technique is widely used in integrated programmes against tephritid fruit flies and, in this paper, quality parameters of irradiated B. zonata were evaluated for possible use of sterile insect technique within the management of this pest. Pupae were irradiated (60Co) 48 h before adult emergence (in an air atmosphere) with doses of 10, 30, 50, 70 or 90 Gy. While adult emergence and egg hatch decreased with increasing dose, no significant differences in female fecundity were found among doses. Exposure of pupae to 90 Gy resulted in a total sterility of eggs laid by non-treated females crossed with treated males. Only insignificant difference in the radiation effect on female fecundity was found. Moderate effects on sex ratio and size were recorded, as they decreased gradually by increasing doses. No considerable effect on flying capability was observed, but generally, the percentage of fliers decreased with increasing radiation doses. Fried's competitiveness values of treated males (30 and 70 Gy) suggest that irradiated males compete successfully with non-irradiated ones.

Effect of Irradiating Puparia of Oriental Fruit Fly (Diptera: Tephritidae) on Adult Survival and Fecundity for Sterile Insect Technique and Quarantine Purposes

2019 ◽  
Vol 112 (6) ◽  
pp. 2808-2816 ◽  
Author(s):  
Suhana Yusof ◽  
Ahmad Zainuri Mohamad Dzomir ◽  
Salmah Yaakop
Keyword(s):  
Sex Ratio ◽  
Sterile Insect Technique ◽  
Adult Emergence ◽  
Fruit Fly ◽  
Bactrocera Dorsalis ◽  
Adult Survival ◽  
Adult Longevity ◽  
Oriental Fruit Fly ◽  
New Findings ◽  
Morphological Differences

Abstract The aim of this study was to investigate the effect of gamma irradiation on survivability (adult emergence, sex ratio, adult longevity), fecundity (eggs hatchability, number of eggs produced), and morphological differences in the size of the ovary and testes of unirradiated and irradiated adults of Oriental fruit fly [Bactrocera dorsalis (Hendel)]. A dose of 100 Gy was determined as the minimum needed for inhibitory effects against B. dorsalis that would not deter adult emergence, sex ratio (male:female), and adult longevity, with 82.6 ±7.02, 1:1.09, and 107 ± 24.5, respectively. Doses from 50 to 400 Gy range did not completely prevent the adult emergence; however, the emergence decreased by increasing the radiation dose. Adult survivability significantly decreased among all the treatment groups of B. dorsalis, except for the 50 Gy and unirradiated flies. At a dose of 50 Gy, fertile females showed a significant reduction in fecundity by not producing eggs after mating with the sterile males. Meanwhile, the number of eggs laid decreased with increasing dose and no fertile egg was hatched starting at 100 Gy of irradiation. Testes and ovaries of 20-d old flies irradiated as pupae were smaller than those of control flies. In this study, 100 Gy was concluded as the minimum effective dose for the disinfestation and sterilization of B. dorsalis puparia. Results represent new findings used as a basis for sterile insect technique and quarantine programs for managing B. dorsalis, particularly in Malaysia.

Visibility and Persistence of Fluorescent Dyes, and Impacts on Emergence, Quality, and Survival of Sterile Queensland Fruit Fly Bactrocera tryoni (Diptera: Tephritidae)

2020 ◽  
Vol 113 (6) ◽  
pp. 2800-2807
Author(s):  
Humayra Akter ◽  
Phillip W Taylor ◽  
Peter Crisp
Keyword(s):  
Sterile Insect Technique ◽  
Fluorescent Dyes ◽  
Survival Rates ◽  
Adult Emergence ◽  
Fruit Fly ◽  
Bactrocera Tryoni ◽  
Similar Dose ◽  
Monitoring Traps ◽  
Dose Levels ◽  
Dose Dependent

Abstract Tephritid flies released in sterile insect technique pest management programs are usually marked with fluorescent dyes so that they can be distinguished from wild flies in monitoring traps. Dyes can have adverse effects on emergence, quality, and survival, which can impact sterile insect technique (SIT) success, and so it is important to identify dyes and doses that maximize marking efficacy while minimizing deleterious effects on fly quality. This study examines the effects of five fluorescent dye products, Fluoro Pink, Fluoro Orange, Stella Green, Arc Chrome, and Astral Pink applied at four dose levels (1, 2, 3, and 4 g/liter) on Queensland fruit fly. All dye products caused a similar dose-dependent reduction in percentage of adult emergence. Incidence of morphological deformity of emerged adults increased with dose, and this trend was similar for all dye products. No effects of dye product or dose were found on survival rates over the first 35 d of adulthood, although females tended to have higher survival than males. Visibility varied with dose and dye product; 1 g/liter dye was less visible than 2, 3, or 4 g/liter, and Stella green had lower visibility than other dyes. All of the tested dyes except for Stella green were similar in all assessed metrics of fly performance and are recommended for use in SIT programs.

scholarly journals Genetic analysis of medfly populations in an area of sterile insect technique applications

2021 ◽  
Author(s):  
Rubén Sancho ◽  
Ana Guillem-Amat ◽  
Elena López-Errasquín ◽  
Lucas Sánchez ◽  
Félix Ortego ◽  
...  
Keyword(s):  
Genetic Markers ◽  
Sterile Insect Technique ◽  
Ceratitis Capitata ◽  
Natural Populations ◽  
Low Frequency ◽  
Fruit Fly ◽  
Wild Populations ◽  
Genetic Sexing ◽  
Environmental Implications ◽  
Genetic Sexing Strains

AbstractThe sterile insect technique (SIT) is widely used in integrated pest management programs for the control of the Mediterranean fruit fly (medfly), Ceratitis capitata. The genetic interactions between the released individuals from the genetic sexing strains (GSS), used for SIT applications worldwide, and wild individuals have not been studied. Under the hypothesis that a number of Vienna GSS individuals released to the field might not be completely sterile and may produce viable offspring, we have analyzed medfly Spanish field populations to evaluate the presence of Vienna strain genetic markers. To this goal, we have used contrasted nuclear and mitochondrial genetic markers, and two novel sets of nuclear polymorphisms with the potential to be markers to discriminate between Vienna and wild individuals. Nuclear Vienna markers located on the 5th chromosome of Vienna males have been found in 2.2% (19 from 875) of the Spanish wild medfly females captured at the area where SIT is applied. In addition, a female-inherited mitochondrial Vienna marker has been found in two from the 19 females showing nuclear Vienna markers. The detection of several of these markers in single individuals represents evidence of the introgression of Vienna strain into natural populations. However, alternative explanations as their presence at low frequency in wild populations in the studied areas cannot be fully discarded. The undesired release of non-fully sterile irradiated GSS individuals into the field and their interactions with wild flies, and the potential environmental implications should be taken into account in the application of the SIT.

Dynamics of oil quality parameters changes related to olive fruit fly attack

2010 ◽  
Vol 112 (9) ◽  
pp. 1033-1040 ◽  
Author(s):  
Olivera Koprivnjak ◽  
Ivana Dminić ◽  
Urška Kosić ◽  
Valerija Majetić ◽  
Sara Godena ◽  
...  
Keyword(s):  
Oil Quality ◽  
Fruit Fly ◽  
Quality Parameters ◽  
Olive Fruit Fly ◽  
Olive Fruit

Bactrocera zonata (peach fruit fly).

2021 ◽  
Author(s):  
Abdeljelil Bakri
Keyword(s):  
Plant Protection ◽  
Reproductive Potential ◽  
Fruit Fly ◽  
Dispersal Ability ◽  
South East Asia ◽  
Peach Fruit ◽  
Export Markets ◽  
Bactrocera Zonata ◽  
Control Programmes ◽  
Mediterranean Plant

Abstract Native to South and South-East Asia, B. zonata is now found in more than 20 countries. The potential risk of its introduction to a new area is facilitated by increasing international tourism and trade, and is influenced by changes in climate and land use. After introduction, it can easily adapt and spread as it is a polyphagous species and has a high reproductive potential (as many as 564 eggs in a lifetime), high biotic potential (several generations of progeny in a year), and a rapid dispersal ability. B. zonata is a strong flier and can be active throughout the year. Economic impacts may result primarily from the loss of export markets and the costly requirement of quarantine restrictions and eradication measures. Furthermore, its establishment may have a serious impact on the environment following the initiation of chemical and/or biological control programmes. B. zonata is of quarantine significance to EPPO (the European and Mediterranean Plant Protection Organization) countries. The pest is classified on the A1 List of Pests recommended for regulation as quarantine pests.

scholarly journals Mediterranean Fruit Fly Ceratitis capitata (Diptera: Tephritidae) Eggs and Larvae Responses to a Low-Oxygen/High-Nitrogen Atmosphere

Insects ◽  
2020 ◽  
Vol 11 (11) ◽  
pp. 802
Author(s):  
Farhan J.M. Al-Behadili ◽  
Manjree Agarwal ◽  
Wei Xu ◽  
Yonglin Ren
Keyword(s):  
Ceratitis Capitata ◽  
Insect Pests ◽  
Sex Ratios ◽  
Adult Emergence ◽  
Fruit Fly ◽  
Nitrogen Atmosphere ◽  
Mediterranean Fruit Fly ◽  
Low Oxygen ◽  
High Nitrogen ◽  
Complete Control

The Mediterranean fruit fly, Ceratitis capitata (Wiedemann) (Diptera: Tephritidae), is one of the most damaging horticultural insect pests. This study used a low-oxygen/high-nitrogen bioassay to control C. capitata. Two low-oxygen treatments were applied (0.5% O2 + 99.5 N2 and 5% O2 + 95% N2) to C. capitata eggs and 1st, 2nd and 3rd instar larvae from 0 to nine days on a carrot diet at 25 °C; 70—75% RH. The pupariation, adult emergence, and sex ratios of survived flies were examined. The results demonstrate that increased mortality of all tested life stages correlated with increased exposure times at both levels of low-oxygen treatments. Complete control of eggs was achieved after eight days and nine days for larvae using 0.5% O2 at 25 °C; 70–75% RH. The 3rd instar was the most tolerant stage, while the egg was the most susceptible stage to the low-oxygen environment. There were no significant differences in sex ratios between emerged adults after low-oxygen and control treatments. The present work demonstrates and confirms the mortalities of C. capitata caused by low-oxygen treatment, which may help develop new postharvest strategies to control this destructive fruit fly pest.

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