Bactrocera dorsalis Hendel and Bactrocera zonata (Saunders) population fluctuations as influenced by various abiotic factors, at two different locations of North West Plain Zone of India

2016 ◽  
Author(s):  
Reena Sinha
Keyword(s):  
Abiotic Factors ◽  
Bactrocera Dorsalis ◽  
Population Fluctuations ◽  
North West ◽  
Bactrocera Zonata

scholarly journals Impact of abiotic factors on population dynamics of Bactrocera dorsalis Hendel and Bactrocera zonata (Saunders) at different ecological zones in NW Plains of India

2021 ◽  
Vol 22 (3) ◽  
pp. 250-257
Author(s):  
REENA ◽  
AMANDEEP KAUR ◽  
MAHENDER SINGH ◽  
BHAV KUMAR SINHA ◽  
ANIL KUMAR ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Fruits And Vegetables ◽  
Abiotic Factors ◽  
Economic Loss ◽  
Fruit Flies ◽  
Bactrocera Dorsalis ◽  
North West ◽  
Ecological Zones ◽  
Bactrocera Zonata ◽  
Trap Catches

In India, fruit flies have been identified as one of the ten most serious problems of agriculture because of their polyphagous nature and the huge economic loss it causes to the fruits and vegetables (2.5 to 100%). Study was carried to determine the population dynamics of fruit flies (Bactrocera dorsalis and Bactrocera zonata) and establish the correlation with abiotic factors in guava and citrus fruits crops in two agro ecological zones of North West India. Fruit flies population was recorded by installation of pheromone traps in different fruit crop ecosystems during the fruiting season of this zone. The data of trap catches of both the locations was correlated with the significantly influencing abiotic parameters. The peak fruit fly incidence varied between 31st to 34th standard weeks in guava ecosystem at both the locations. In citrus ecosystem, the incidence was highest during 35th and 39th standard weeks coinciding with the ripening of the fruits. At both the locations, trap catches of guava ecosystem were positively correlated with all the weather parameters, while under citrus ecosystem minimum temperature and rainfall showed negative correlation, but relative humidity was positively correlated. Information may be utilized in targeting suitable pest management techniques for respective zones.

Field response of three Tephritid fruit flies to three food-based attractants and suppression of Bactrocera zonata (Saunders) using Mazoferm–Spinosad in guava ecosystem in Sudan

2021 ◽  
Author(s):  
Mohammed E. E. Mahmoud ◽  
Mohammed ◽  
Fathya M. Khamis and ◽  
Sunday Ekesi ◽  
Keyword(s):  
Fruits And Vegetables ◽  
Fruit Flies ◽  
Bactrocera Dorsalis ◽  
Economic Losses ◽  
Horticultural Crops ◽  
Torula Yeast ◽  
Bactrocera Zonata ◽  
Male Annihilation ◽  
Environmentally Friendly Approach ◽  
Tephritid Fruit Flies

Abstract Fruit flies of the genus Bactrocera are the most damaging pests of horticultural crops, leading to severe economic losses hindered exportation. Bactrocera dorsalis (Hendel) and Bactrocera zonata (Saunders) were reported in Sudan in 2005 and 2011 respectively affecting most of the fruits and vegetables in Sudan threatening income of poor farmers. Only Male Annihilation Technique (MAT) is applied in Sudan to manage the two Bactrocera species. A filed experiment was conducted to evaluate the response of B. dorsalis, B. zonata and Zeugodacus cucurbitae to three food-based attractants using McPhail traps in two sites in Gezira state, Sudan. Also, other trial was undertaken to determine the effect of spray of Mazoferm and Spinosad combination to control B. zonata. The results showed that food-based attractants lured both sexes of the above mentioned fruit flies and females represented (55-86%). At the first site, B. zonata responded in high numbers to Mazoferm followed by Torula yeast and GF-120 respectively while it responded equally to the Mazoferm and Torula yeast in the second site. B. dorsalis responded positively to Mazoferm followed by Torula yeast and GF-120 while Z. cucurbitae was attracted to Mazoferm, GF-120 and Torula for each attractant respectively. Spray of Mazoferm combined with Spinosad significantly reduced population of B. zonata (FTD) population and suppressed infestation level of guava fruits (fruit flies/Kg of fruits) when compared to unsprayed orchard. Bait Application Technique is an environmentally friendly approach that reduces infestation levels, lessen contamination and safeguard produce.

Population Fluctuations and Reproduction of Rabbits in a Pastoral Area on the Coast North of Carnarvon, W. A.

1983 ◽  
Vol 10 (1) ◽  
pp. 97 ◽  
Author(s):  
DR King ◽  
SH Wheeler ◽  
GL Schmidt
Keyword(s):  
Breeding Season ◽  
Oryctolagus Cuniculus ◽  
Cost Effective ◽  
Effective Control ◽  
Population Fluctuations ◽  
North West ◽  
The North ◽  
Pastoral Area ◽  
Average Rainfall ◽  
Summer Rain

The population fluctuations and reproductive biology of rabbits, Oryctolagus cuniculus (L.), were studied in a coastal pastoral area in the north-west of Western Australia between 1974 and 1981. Numbers were highest in late 1975-early 1976 and declined during a period of below-average rainfall in 1976-79, but were still found in all landforms. The breeding season was more regular than that of rabbits in other pastoral areas, and appeared to be a response to winter rains which were relatively predictable in timing, if not amount. Successful summer breeding also followed heavy summer rain. There appears to be no opportunity for cost-effective control of rabbits in the area by techniques currently available, as even when numbers are low the rabbits are widespread.

scholarly journals Applying biomass and stem fluxes to quantify temporal and spatial fluctuations of an old-growth forest in disturbance

2009 ◽  
Vol 6 (9) ◽  
pp. 1839-1848 ◽  
Author(s):  
S. Liu ◽  
Y.-L. Li ◽  
G.-Y. Zhou ◽  
K. O. Wenigmann ◽  
Y. Luo ◽  
...  
Keyword(s):  
Abiotic Factors ◽  
Population Fluctuations ◽  
Old Growth ◽  
Old Growth Forest ◽  
Spatial Fluctuations ◽  
Closed Canopy ◽  
Average Biomass ◽  
Annual Biomass ◽  
Temporal And Spatial ◽  
Stem Mortality

Abstract. A subtropical old-growth forest was studied over a twelve-year period to investigate temporal and spatial fluctuations of biomass and stem fluxes under disturbances. Vegetations were categorized into three types according to disturbances caused by biotic and abiotic factors, including Castanopsis chinensis population, insect direct-influenced population, and insect indirect-influenced population according to disturbance scenarios. The biomass fluxes (growth and mortality) and stem fluxes (stem recruitment and mortality) were used to quantify population fluctuations. Annual average biomass growth rate was stable throughout the study while annual biomass mortality and stem fluxes increased consistently. C. chinensis population predominantly contributed to biomass fluxes of the community. Biomass and stem mortalities of insect direct-influenced population increased significantly during the whole study period (1992–2004). Results of indirect-influenced population showed that (1) the increase in biomass of the dominant species was well correlated between different intervals. Similar relationships were found in stem fluxes; (2) higher stem mortality occurred within the DBH range of 1 to 10 cm; (3) stem fluxes in the canopy gaps were remarkably higher than those in closed canopy.

scholarly journals Seasonal Population Abundance of Bactrocera Dorsalis Hendel (Diptera: Tephritidae) in Selected Districts of Northern KwaZulu Natal, South Africa

2021 ◽  
Vol 2 (1) ◽  
pp. 79-84
Author(s):  
Simphiwe Mnguni
Keyword(s):  
South Africa ◽  
Abiotic Factors ◽  
Management Strategies ◽  
Bactrocera Dorsalis ◽  
Invasive Potential ◽  
Management Options ◽  
Kwazulu Natal ◽  
Important Pest ◽  
Trap Catches ◽  
Seasonal Population

The fruitfly Bactrocera dorsalis is an economically important pest that requires management for the sustainability of agriculture in South Africa. This pest has spread from the country's Northern parts within a decade, where it has completely established and spread to other neighbouring provinces. The pest spreads at various rates due to different factors given biotic and abiotic factors. Understanding factors that influence pest prevalence will assist with practical management strategies. Temperature is one of the factors that assist the invasive potential of B. dorsalis. KwaZulu Natal province is among the hotspot provinces in the country besides Limpopo and Mpumalanga. Trap catches in Northern KwaZulu Natal, uMkhanyakude and King Cetshwayo districts show that the seasonal populations of B. dorsalis are continuously present all year round, even with the application of management options to reduce pest populations. Host availability plays a significant role in the invasion and total outcompeting of other native fruitflies e.g. Ceratitis punctata.

scholarly journals Fluktuasi Populasi Lalat Buah Bactrocera spp. (Diptera : Tephritidae) pada Pertanaman Cabai Merah (Capsicum Annuum) di Kabupaten Bandung, Jawa Barat

Agrikultura ◽  
2017 ◽  
Vol 28 (3) ◽  
Author(s):  
Agus Susanto ◽  
Yadi Supriyadi ◽  
Tohidin Tohidin ◽  
Nenet Susniahti ◽  
Vickri Hafizh
Keyword(s):  
Capsicum Annuum ◽  
Host Plants ◽  
Fruits And Vegetables ◽  
Abiotic Factors ◽  
Fruit Fly ◽  
Fruit Flies ◽  
Bactrocera Dorsalis ◽  
Survey Method ◽  
Biotic Factors ◽  
Rainy Days

ABSTRACTFluctuation population of fruit flies Batrocera spp. (Dipthera: Tephritidae) on chilli (Capsicum annuum) plantation areas in Bandung Regency, West JavaFruit flies (Bactrocera spp.) are destructive pest that cause damages to horticulture commodities such as fruits and vegetables. The purpose of this study was to investigate fluctuation population of fruit flies in relation to abiotic factors, such as temperature, rainfall, number of rainy days, and biotic factors, such as host phenology and natural enemies. The field experiment was conducted in Pulosari Village, Pangalengan, Bandung. This research used survey method by placing 20 fruit flies traps on host plants, in which 10 traps were being placed in the outside and the others were being placed in the inside within 10 meters distance per trap. Trapped flies were collected and their population was counted in every week. The results revealed that abiotitic factors (temperature, rainfall, number of rainy days) have non significant influence indicated by the regression analysis of each temperature (Y=-101.2+2298.7x; R2=0.253; P>0.05), rainfall (Y= 0.143+154.4x; R2 = 0.004; P> 0.05), and the number of rainy days (Y= 6.607+140.51x; R2 = 0.015; P>0.05). Meanwhile, fruit fly with the dominant population was Bactocera dorsalis which was included into sibling species of Bactrocera dorsalis Complex with number of population was 93% from specimen sample.Keywords: Fluctuation population, fruit flies, Batrocera dorsalis Complex, ChilliABSTRAKLalat buah (Bactrocera spp.) merupakan hama penting yang menyerang tanaman hortikultura baik buah-buahan ataupun sayuran buah. Penelitian ini bertujuan untuk mengetahui korelasi fluktuasi populasi lalat buah pada pertanaman cabai merah terhadap faktor abiotik berupa suhu, curah hujan, jumlah hari hujan dan faktor biotik berupa fenologi tanaman inang dan musuh alami. Percobaan ini dilaksanakan di Desa Pulosari, Kecamatan Pangalengan Kabupaten Bandung. Percobaan dilakukan menggunakan metode survei dengan memasang perangkap lalat buah pada lahan pertanaman cabai merah sebanyak 20 perangkap dengan 10 perangkap bagian luar dan 10 perangkap bagian dalam dengan jarak antar perangkap 10 meter. Hasil tangkapan dikumpulkan dan dihitung populasi lalat buah yang terperangkap setiap minggunya. Hasil penelitian menunjukan faktor abiotik (suhu, curah hujan, jumlah hari hujan) tidak memberikan pengaruh signifikan ditunjukan dengan analisis regresi masing-masing pada suhu ( Y= -101,2+ 2298,7x ; R2=0,253; P > 0,05), Curah hujan (Y= 0,143 + 154,4x ; R2= 0,004 ; P > 0,05), dan Jumlah hari hujan (Y= 6,607 + 140,51x ; R2=0,015 ; P > 0,05) Sedangkan lalat buah yang memiliki populasi paling dominan adalah Bactrocera dorsalis yang termasuk sibling dari spesies Bactrocera dorsalis Kompleks dengan jumlah populasi sebanyak 93% dari sampel spesimen.Kata kunci : Fluktuasi populasi, Lalat buah, Bactrocera dorsalis Kompleks, Cabai merah

A weekly study on Bactrocera zonata S. and Bactrocera dorsalis H. (Diptera: Tephritidae) against methyl eugenol, raspberry essence and GF-120 in persimmon orchards from Kohat, Pakistan

2017 ◽  
Author(s):  
Uzair Ahmad ◽  
Unab Begum
Keyword(s):  
Population Density ◽  
Fruit Fly ◽  
Fruit Flies ◽  
Methyl Eugenol ◽  
Population Trend ◽  
Bactrocera Dorsalis ◽  
Bactrocera Zonata ◽  
Number Of Males ◽  
Maximum Population Density ◽  
Over Time

A study was conducted to find out the efficacy of the lures viz methyl eugenol, raspberry essence and GF-120 in baited fruit fly traps at persimmon orchards in Kohat district, KPK. Three treatments: T1 (Methyl eugenol), T2 (Raspberry essence) and T3 (Gf-120) with nine replications treatment-1 were installed. Results revealed highest population density for fruit flies in T1 (382), following T3 (197.2) while the least population density was revealed in T2 (23.6). Population trend over time showed maximum population density for fruit flies at week 1, following week 2, week 4, week 3 and week 5. The number of fruit flies were observed with highest average number of Bactrocera zonata (700) in T1 (week 1), whereas Bactrocera dorsalis (250) in T1 (week 1), while the minimum average number of 08 in T2 (week 5) and 01 in T2 (week 5) was recorded for B. zonata and B. dorsalis, respectively. Maximum average numbers of males were recorded 950 in T1 (week 1), whereas the minimum average number of males revealed 09 in T2 (week 5). Average population density of fruit flies (gender) revealed 200.93 (male) while it revealed 0.0 for females.

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