apple and sugar feeding in adult codling moths
Post on 23-Jun-2015
Embed Size (px)
- 1. Apple and sugar feeding in adult codlingmoths, Cydia pomonella : Effect on longevity,fecundity, and egg fertility
2. Attraction of adult codling moths to sweetbaits has been well documented. However,beneficial effects of sugar feeding on mothfitness have not been demonstrated. 3. Introduction C. pomonella larvae do not exhibit normaldevelopment on the flesh or seeds of ripeapples. Adults are attracted to traps baited with ripeapples or pears.* Codling moth response to ripe fruit might beexplained as the seeking of feeding sites. 4. Introduction Females fed honey water laid twice as manyeggs as starved moths. (Weisman) Neither fecundity nor egg fertility wasenhanced by access to water, but feeding didincrease longevity. (Howell) The number of fertile eggs laid by C.pomonella decreases with increased femaleage. (Deseo,Vickers) 5. Materials and methods Codling moths were held in 473 ml plastic cups with lidsmodified with a fine mesh screen placed 70 mm diameter piece of filter paper on thebottom Affixed yellow sticky note on the inside of wall of eachcup Obtained adult moths within 24 hours of enclosion 6. Treatments1. STARVED no food or water2. WATER deionized water3. SUCROSE SOLUTION4. HONEY WATER5. APPLE JUICE6. APPLE FLESH 7. Materials and Methods ANOVA Analysis of Variance Used to compare adult longevity among feedingtreatments and between the sexes Used to compare total number of eggs laid andthe percentage of eggs laid that were fertile 8. ResultsLongevitySucrose water, honey water, andapple juice yielded the highestoverall longevity. 9. ResultsFecundityTotal fecundity was highest formoths maintained on honeywater or apple juice 10. ResultsEgg fertility tended todecline with increasingfemale longevity. 11. ResultsThe interaction between feedingtreatment and time factordisplaying a decline in fecundityper day across all feedingtreatments over time. 12. Results Sugar feeding by females, enhance fecundity and eggfertility directly, and increased longevity fromfeeding extend oviposition periods. In males, enhanced longevity from feeding mightlead to more mating opportunities. Sugar consumption could enhance moth dispersal. Attraction of moths to sweet baits was because ofthe beneficial effects of adult feeding. 13. Cydia pomonella show enhanced longevityand reproductive output from sugar feeding.It explains that the attraction of adult mothsto sweet baits and odors from ripe fruit, whichmay be a natural source of food in the field.