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107 results for “Bactrocera dorsalis”
F I G U R E 3 in Oviposition by the oriental fruit fly, Bactrocera dorsalis (Hendel) (Diptera: Tephritidae), on five citrus types in a laboratory
F I G U R E 3 Mean (±1 SE) proportion of time female Bactrocera dorsalis spent on aggression, grooming, oviposition, probing, being inactive, and walking and tasting on (a) damaged and (b) undamaged citrus types and a positive control (Golden Delicious apple). Citrus types investigated were Golden Delicious apple, Delta Valencia orange, Eureka lemon, Glen Ora navel orange, Nadorcott mandarin and Star Ruby grapefruit. Each female was observed for 20 min.
F I G U R E 2 in Oviposition by the oriental fruit fly, Bactrocera dorsalis (Hendel) (Diptera: Tephritidae), on five citrus types in a laboratory
F I G U R E 2 First-order Markovian analyses showing the probability of transition from one behaviour to another by gravid female Bactrocera dorsalis on (a) damaged and (b) undamaged citrus (all types pooled). Transitions with p ≥ 0.10 are indicated by solid lines, and those with 0.09 ≥ p ≥ 0.03 are indicated by dashed lines. Values in parentheses indicate frequencies of each behaviour observed.
F I G U R E 1 in Oviposition by the oriental fruit fly, Bactrocera dorsalis (Hendel) (Diptera: Tephritidae), on five citrus types in a laboratory
F I G U R E 1 Non-metric multidimensional scaling (NMDS) ordination plot showing the relative similarity of essential oil composition of different citrus types and degrees of ripeness. Ellipses represent 95% confidence intervals. The treatments tested were degrees of ripeness denoted as Green, Colour Break, Ripe or Over Ripe and were tested on variants Eureka lemon, Nadorcott mandarin, Glen Ora Late navel orange, Delta Valencia orange and Star Ruby grapefruit.
Figure 1 in Ability of Sterile Males to Inhibit Female Remating in the Oriental Fruit Fly, Bactrocera dorsalis (Hendel) (Diptera: Tephritidae)
Figure 1. Numbers of rematings observed per cage for females first mated to fertile wild or sterile DTWP males at 3 intervals after the initial mating. Each cage held 10 test females. Symbols represent mean values + 1 SE; N = 8 in all cases.
Figure 7 in From Eradication to Containment: Invasion of French Polynesia by Bactrocera dorsalis (Hendel) (Diptera: Tephritidae) and Releases of Two Natural Enemies: A 17-Year Case Study
Figure 7. Annual percentage of individual guavas infested with fruit flies on Tahiti. Number of fruits incubated individually each year were: 172 in 2002, 348 in 2003, 539 in 2004, 607 in 2005, 98 in 2006, 4 in 2007, 237 in 2008, and 807 in 2009.
Figure 6a–d in From Eradication to Containment: Invasion of French Polynesia by Bactrocera dorsalis (Hendel) (Diptera: Tephritidae) and Releases of Two Natural Enemies: A 17-Year Case Study
Figure 6a–d. Quarterly emergences on Tahiti of B. dorsalis and F. arisanus per kg fruit for guava (a), Tahitian chestnut (b), tropical almond (c), and mango (d). See under
Figure 4 in From Eradication to Containment: Invasion of French Polynesia by Bactrocera dorsalis (Hendel) (Diptera: Tephritidae) and Releases of Two Natural Enemies: A 17-Year Case Study
Figure 4. Annual proportion of fruit fly (B. dorsalis, B. tryoni, B. kirki) and parasitoid (F. arisanus, D. longicaudata) emergences in guava, tropical almond, Tahitian chestnut, and mango fruits for selected years.
Figure 3a, b in From Eradication to Containment: Invasion of French Polynesia by Bactrocera dorsalis (Hendel) (Diptera: Tephritidae) and Releases of Two Natural Enemies: A 17-Year Case Study
Figure 3a, b. Coconut husk block (a) and BactroMAT-ME (b) bait stations used for eradication of B. dorsalis. (Photos: L. Leblanc).
Figure 1 in From Eradication to Containment: Invasion of French Polynesia by Bactrocera dorsalis (Hendel) (Diptera: Tephritidae) and Releases of Two Natural Enemies: A 17-Year Case Study
Figure 1. Monthly captures of B. dorsalis in methyl eugenol traps and quarterly percent parasitism on guava, Tahitian chestnut and tropical almond on Tahiti.
Figure 2 in Mark-Release-Recapture Experiments on the Effectiveness of Methyl Eugenol-Spinosad Male Annihilation Technique Against an Invading Population of Bactrocera dorsalis
Figure 2. Visual representation of the MAT-ME saturation hypothesis. Darker areas represent higher concentrations of attractant odor in the air column, represented from above. (A) A single sentinel trap baited with 6 ml of methyl eugenol under control conditions. A release of males around the center of the area would lead some of the males to find the plume and successfully follow it to the trap for capture. (B) A single sentinel trap with some MAT-ME spots (low rate). More attractant is available, but gradients to point sources are still clear; note that the MAT-ME spots have a lower overall concentration at the source. (C) A single sentinel trap with a high density of MAT-ME spots. A haze of attractant exists, making gradients shorter. The sentinel trap is still about as effective as before due to higher final concentration, but the less concentrated MAT-ME spots are harder to find.
Figure 5a–d in From Eradication to Containment: Invasion of French Polynesia by Bactrocera dorsalis (Hendel) (Diptera: Tephritidae) and Releases of Two Natural Enemies: A 17-Year Case Study
Figure 5a–d. Quarterly emergences on Tahiti of B. dorsalis and F. arisanus per fruit for guava (a), Tahitian chestnut (b), tropical almond (c), and mango (d). Numbers of fruits used for each host and each year (for guava, Tahitian chestnut, tropical almond and mango, respectively) were: 1998: 1634, 16238, 5314, 67; 1999: 264, 304, 993, 404; 2000: 37, 40, 154, 64; 2001: 52, 0, 20, 74; 2002: 492, 1204, 474, 268; 2003: 1531, 1539, 2685, 977; 2004: 2252, 1324, 810, 291; 2005: 1071, 904, 4373, 436; 2006: 1927, 3343, 3140, 1044; 2007: 1537, 1525, 4200, 1814; 2008: 3255, 2648, 5045, 2052; 2009: 1515, 1972, 5475, 549.
Figure 1 in Mark-Release-Recapture Experiments on the Effectiveness of Methyl Eugenol-Spinosad Male Annihilation Technique Against an Invading Population of Bactrocera dorsalis
Figure 1. Mean proportion recaptured by treatment. Whiskers indicate standard errors. Letters indicate statistically significant differences at α = 0.05 via two-sample z-test (see text for details)
Fig. 5 in Female remating inhibition and fitness of Bactrocera dorsalis (Diptera: Tephritidae) associated with male accessory glands
Fig. 5. Fecundities of Bactrocera dorsalis females of various mating statuses. A. Lifetime mean number (± S.E.) of eggs laid per female, and B. Mean oviposition rates per week of Bactrocera dorsalis females of various mating statuses. G1, virgin females housed alone (n = 30); G2, females mated once (n = 26); G3, females mated twice with different virgin males (n = 32); G4, females mated with males that had mated on the previous day (n = 29); G5, females housed with males at a sex ratio of 1: 1 (n = 23); G6, females housed with males at a sex ratio of 1♀: 23 (n = 24). Different letters indicate significant differences.
Fig. 1 in Female remating inhibition and fitness of Bactrocera dorsalis (Diptera: Tephritidae) associated with male accessory glands
Fig. 1. Male accessory glands of Bactrocera dorsalis. One pair of long tube mesodermal accessory glands (MAG) and 3 pairs of long, convoluted, complex and fragile ectodermal accessory glands (EAG).
Fig. 6 in Female remating inhibition and fitness of Bactrocera dorsalis (Diptera: Tephritidae) associated with male accessory glands
Fig. 6. Fertilities of Bactrocera dorsalis females of various mating statuses. A. Lifetime mean percent hatch of eggs laid by females of G2 – G6 mating statuses, B. Mean percent hatch of eggs laid each week by females of G2 – G6 mating statuses. G2, females mated once (n = 18); G3, females mated twice with virgin males (n= 20); G4, females mated with non-virgin males (n = 18); G5, females housed with males with a sex ratio of 1: 1 (n = 18); G6, females housed with males with a sex ratio of 1♀: 23 (n = 19). Data for the unfertilized eggs laid by virgin females in group G1 and for females that produced fewer than 5 eggs in total were not analyzed. Different letters indicate significant differences.
Fig. 3 in Female remating inhibition and fitness of Bactrocera dorsalis (Diptera: Tephritidae) associated with male accessory glands
Fig. 3. Mean percentage of successful matings among Bactrocera dorsalis of different mating statuses. M1, matings of 8-day old virgin females with of 8-day old virgin males on day 1; M2, matings of 9-day old virgin females with 9-day old virgin males on day 2; M3, matings of 10-day old virgin females with 10-day old males on day 3; M4, matings on day 2 of virgin females with males that had mated on day 1; M5, both first and second matings with virgin males; M6, first mating to non-virgin male and remating to virgin male. Different letters indicate significantly different proportions.
Fig. 6 in Identification and characterization of three juvenile hormone genes from Bactrocera dorsalis (Diptera: Tephritidae)
Fig. 6. Effects of starvation on the expression of BdJHEH2, BdJHEH3, and BdJH- DK in Bactrocera dorsalis. The 2-d-old 3rd instars were fed or starved for 24 and 48 h before collection. The re-fed larvae were initially starved for 24 h, then refed for an additional 24 h prior to collection. F24: feeding 24 h; F48: feeding 48 h; S24: starvation 24 h; S48: starvation 48 h; RF: re-fed. Different letters indicate significant differences based on 1-way ANOVA followed by an LSD test (P <0.05).
Fig. 3 in Identification and characterization of three juvenile hormone genes from Bactrocera dorsalis (Diptera: Tephritidae)
Fig. 3. Relative expression levels of BdJHEH2, BdJHEH3, and BdJHDK in developmental stages of Bactrocera dorsalis. Expression levels at 19 time points in (A) 3rd instar larvae and pupae and (B) adults were detected by qPCR. 3L1: 1-d-old 3rd instar larvae; P1: 1-d-old pupae. Females or males were collected for qPCR analysis at 1, 4, 7, and 10 d afer eclosion. Different letters indicate significant differences among females or males based on 1-way ANOVA followed by an LSD test (P <0.05). Significant differences between the females and males determined with a t-test are indicated by * (P <0.05).
Fig. 4 in Identification and characterization of three juvenile hormone genes from Bactrocera dorsalis (Diptera: Tephritidae)
Fig. 4. Relative expression levels of BdJHEH2, BdJHEH3, and BdJHDK in tissues of Bactrocera dorsalis. Expression levels in the head (HD), thorax (TH), midgut (MG), Malpighian tubules (MT), and fat body (FB) were detected by qPCR. Different letters indicate significant differences among tissues based on 1-way ANOVA followed by an LSD test (P <0.05).
Fig. 2 in Identification and characterization of three juvenile hormone genes from Bactrocera dorsalis (Diptera: Tephritidae)
Fig. 2. Multiple sequence alignment and phylogenetic analysis of JHDK from Bactrocera dorsalis and other insects. (A) Sequence alignment. The sequence of B. dorsalis JHDK is compared to SCP2 from Drosophila melanogaster (Dm), and JHDK from Leptinotarsa decemlineata (Ld), Manduca sexta (Ms), Plutella xylostella (Px), and Spodoptera litura (Sl). The α-helices (H1-8) and EF hands are indicated above the alignment according to results from B. mori (Li et al. 2005).Three predicted GTP-binding motifs (Σ1–3) are labeled with an arrow. (B) Phylogenetic analysis of JHDK homologs. The tree was generated with MEGA 5 using the neighbor-joining method. Nodes with>50% bootstrap values (1,000 replicates) are indicated on branches. GenBank accession numbers of all sequences are listed in the tree.
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