Survey and Monitoring of Chinese Citrus Fly (Bactrocera minax Enderlein) in Sweet Orange Orchards of Sindhuli, Nepal (original) (raw)
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Journal of Agriculture and Environment
Chinese citrus fly, Bactrocera minax (Enderlein) (Diptera: Tephritidae) is one of the important citrus pests in Nepal, India and Bhutan including China where it was originated. Since 2014/15, the problem of B. minax in sweet orange fruit is being faced by citrus growers in Sindhuli, Nepal. To mitigate the problem of B. minax, Chinese citrus fly in the orchards, afield practice of area wide control program (AWCP) was piloted in the selected 231 citrus orchards for the first time in Sindhuli in 2018 which has been adopted by 1153 citrus growers in 2019. The obvious recessions of mean fruit damage percentages due to B. minax in the sweet orange orchards at different locations in 2018 (range: 3.9 ± 1.1% to 29.7 ± 9.6%) and 2019 (range: 2.6 ± 0.8% to 7.5 ± 2.3%) have been achieved by virtue of B. minax management through AWCP with poisonous protein bait component and sanitation measure in the citrus orchards.
Journal of the Plant Protection Society
The study was conducted from October to December, 2020 to evaluate farmers' understanding of loss incurred by Bactrocera spp. on mandarin orange and practices adopted by farmers for their management. Eighty households of mandarin orange growers and 15 agro-vets were purposively selected and information was collected using a semi structured questionnaire. The findings indicated severe infestation of fruit fly in mandarin with 53% of the farmers having low (>15%), 36% having medium (15-30%) and 11% having high (>30%) level of fruit damage in their orchards. The survey identified several management practices like collection and destruction of fallen fruits, pruning, use of traps and chemical pesticides in controlling fruit fly. About two-third (61.25%) of the respondents used chemicals and 15% of the farmers collected and destroyed affected fallen fruits. Some farmers also practiced pruning in the study area for the control of fruit fly. The use of traps was a rarity and its ...
Archives of Agriculture and Environmental Science
Unlike other Tephrid flies, the Chinese citrus fly (Bactrocera minax Enderlein) is univoltine and oligophagous species strictly restricted to citrus fruits. It has been a serious threat to the citrus industry in China, Bhutan, India and Nepal causing up to 100% of fruit drop before the harvest. Citrus groves, especially tight-skinned cultivars, sweet orange (Citrus sinensis L. Osbeck) in mid-hill districts like Ramechhap, Sindhuli, Dolakha, Kavre, Syangja, Gulmi, etc. have been threatened while in some pockets, lemon, acid lime, and mandarin have vanished due to the Chinese citrus fly (CCF). The driver behind the spread of this invasive pest seems to be poor research works on the phenology of the pest, ill-equipped management practices, flying nature of adult fly and easy movement of infested fruits. Therefore, with reviewing published data, this study aimed to figure out the most appropriate management technology for curbing the CCF and make comprehensive material for safeguarding ...
Journal of the Plant Protection Society
Fruit flies (Diptera: Tephritidae) are devastating pests in citrus orchards of Nepal causing huge losses of fruits. A farmer's survey was carried from March to December, 2021 randomly selecting 40 citrus orchard owners, and at the same time, a field monitoring of fruit flies organised in randomized complete block design with 7 times replicated 3 treatments (Cue lure and malathion in Steiner trap, Methyl eugenol and malathion in Steiner trap and protein bait in McPhail trap) were conducted in Ramechhap district of Nepal. Survey revealed that Chinese citrus fly was the most problematic insect pest of citrus orchard. However, only few farmers were practising effective control measures against this pest. Nine species of fruit flies were trapped in different lures and protein bait, when the number of fruit flies differed significantly (p<0.05) except Bactrocera correcta and Zeugodacus cucurbitae, which were found attracted in negligible number in Methyl eugenol and Cue lure, respe...
Chinese Citrus fly, Bactrocera(Tetradacus) minax(Enderlein), univoltine fruit fly species, is a serious insect pest in Nepal, Bhutan, China, India causing 100% fruit drop in sweet orange (Citrus sinensis L.) orchards in severe case. Four elevation ranges: 1400-1474masl, 1475-1549masl, 1550-1624masl and >1624masl of Ramechhap district were taken for the study of severity of infestation by this fly species in November 2018. A subsequent rearing was conducted at Agriculture and Forestry University, Chitwan, Nepal upto April 2019 to assess various developmental parameters of Bactrocera minax starting from larval stage in infested sweet oranges to the adult flies. Elevation range had the most significant effect (P<0.05) on pest severity (2017/18). Pest severity had strong relationship on elevation of orchards (R 2 =0.6638). Maximum pest severity (37.12%) was found in 1550-1624masl and minimum (2.90%) in 1400-1474masl. Maximum mean maggots/fruit (6.40±1.25) at 1550-1624masl and minimum (3.95±0.92) at 1475-1549masl were recorded. Post-pupal mortality was higher than pre-pupal mortality. Maximum pre-pupal mortality (11.13±5.24%) at >1624masl and the minimum (2.08±1.46%) at 1550-1624masl were recorded while 1475-1549masl and 1400-1474masl had the respective minimum (25.81±7.59%) and maximum (36.08±9.17%) post-pupal mortality. Most adult flies emerged by 2 nd week of March lasting 115 days for adult eclosion. Sex ratio (male: female) was maximum (2.5) at 1400-1474masl and minimum (1.2) at >1624masl. Without feeding an adult fly survived upto 3 days. It can be speculated that besides other meteorological factors, elevation affects geographical distribution of fly and its subsequent biological parameters.
Journal of Natural History Museum
Protocol based fruit fly surveillance made in 2014-15 in citrus orchards in Sindhuli district revealed six species of Bactrocera flies, namely Bactrocera minax (Enderlein), B. cucurbitaeCoquillett, B. dorsalis (Hendel), B. zonata (Saunders), B. tau Walker and B. scutellaris (Bezzi),and one species of Dacus longicornis Weidman. Except B. minax, other fruit flies we recollected in male lure traps, while B. minax fruit flies were also reared to adults from infested sweet oranges. Each species of fruit flies has been morphologically identified up to species level for field identification purpose. D. longicornis is reported for the first time from Nepal.
Journal of the Institute of Agriculture and Animal Science
Chinese citrus fly is the major pest of sweet orange in citrus growing districts of Bagmati Province Nepal. Farmer’s production constrains and production problems such as Chinese citrus fly problem in sweet orange are not well documented and studied. This study was conducted in Sindhuli, Ramechhap, Dolakha and Kavre districts of Bagmati Province in 2021 with aim to understand the farmer’s perception, knowledge about CCF and their management practices using semi-structured questionnaire. Collected survey data was analyzed using the SPSS-20 and MS Excel. The survey results depicted that the intensity of Chinese citrus fly damage has been decreased in Sindhuli district with the infestation level of < 20% in sweet orange orchard. However, CCF population as well as their damage level was in increasing trend of > 50% in sweet orange orchard in Ramechhap, and > 80% in Dolakha and Kavre district. Chinese citrus fly loss has been recorded up to 25% in Mandarin orange in Dolakha and ...
Biology and management of Chinese citrus fly, Bactrocera minax (Enderlein) (Diptera: Tephritidae)
2022
The Chinese citrus fly, Bactrocera minax (Enderlein) (Diptera: Tephritidae) is an important insect pest of citrus species which causes significant fruit damage in Nepal, India, Bhutan and China. An attempt has been made to review the biological aspects and management measures of this pest compiling published literatures in the national and international journals, proceedings, reports, newsletter and books. This review highlights the findings on the nomenclature, morphology, distribution, biology of the Chinese citrus fly and provides potential prospect of pest management measures, which are useful to the researchers, policy-makers, citrus growers and extension workers.