POPULATION DYNAMICS OF FRUIT FLIES (TEPHRITIDAE) AND STUDY OF GUT BACTERIA OF Bactrocera dorsalis Hendel

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dc.contributor.advisorDr. Rakesh Kumar
dc.contributor.authorMANTHAN JARYAL
dc.date.accessioned2024-03-22T16:14:33Z
dc.date.available2024-03-22T16:14:33Z
dc.date.issued2023-11-04
dc.description.abstractThe present study entitled “Population dynamics of fruit flies (Tephritidae) and study of gut bacteria of Bactrocera dorsalis Hendel.” was carried out in the apple orchard of Dr. YSP UHF Nauni, Solan (HP) and in the mango and guava orchard of RHRT&S Jachh, Kangra, H.P. The gut bacteria study was conducted in Fruit Entomology Laboratory of the Department of Entomology, Dr. YSP UHF Nauni, Solan (HP), during 2022-23. Bactrocera dorsalis Hendel is one of the most destructive fruit fly pests globally. Its short life cycle, wide host range and adaptability make it difficult to control. The feeding activity of maggots leads to putrefaction of fruit pulp and hence direct loss of crop. The activity of fruit flies varies with the prevailing climatic conditions and thus parapheromone traps were installed to study population dynamics of fruit flies in apple, mango and guava orchards. A total of five species of fruit fly viz., B. dorsalis, B. zonata, B. divenderi, B. cucurbitae and B. zahadi were found in all the orchards. The highest mean population of fruit flies in apple orchard was found in the 1st fortnight of August (278.53 fruit flies/trap) with maximum mean population of B. dorsalis (191.56 fruit flies/trap). The highest mean population of fruit flies in mango and guava orchard was found in the 2nd fortnight of August (300.00 and 269.00 fruit flies/trap) respectively, with maximum mean population of B. dorsalis (234.65 and 241.26 fruit flies/trap) respectively. The population of fruit fly species in apple, mango and guava orchard was positively correlated with maximum temperature, rainfall and relative humidity. Among all the fruit flies reared on various fruit crops, maximum bacterial count of 3.91 (Log CFU/g) was found in the gut of B. dorsalis reared on guava whereas minimum bacterial count of 3.19 (Log CFU/g) was found in the gut of B. dorsalis reared on apple. Among all the different culture media used, BHIA resulted in highest bacterial count (4.71 Log CFU/g). Maximum bacterial diversity (21 bacterial isolates) was isolated from the gut of B. dorsalis reared on apple. Out of 31 total bacterial colonies, 11 were found to be morphologically and biochemically different from each other and were subjected for molecular identification. The most prominent genera obtained from gut of B. dorsalis reared on mango were Enterobacter and Klebsiella. However, Shigella and Klebsiella were prominent in the gut of B. dorsalis reared on guava and Bacillus whereas, Citrobacter and Microbacterium were obtained from gut of B. dorsalis reared on apple.
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810207645
dc.keywordsSTUDY OF GUT BACTERIA OF Bactrocera dorsalis Hendel.
dc.keywordsPOPULATION DYNAMICS OF FRUIT FLIES (TEPHRITIDAE)
dc.language.isoEnglish
dc.pages59+xii
dc.publisherUHF Nauni
dc.subEntomology
dc.theme“Population dynamics of fruit flies (Tephritidae) and study of gut bacteria of Bactrocera dorsalis Hendel.”
dc.these.typeM.Sc
dc.titlePOPULATION DYNAMICS OF FRUIT FLIES (TEPHRITIDAE) AND STUDY OF GUT BACTERIA OF Bactrocera dorsalis Hendel
dc.typeThesis
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