Evaluation of Efficacy on Area-wide Control of Oriental Fruit Fly (Bactrocera dorsalis (Hendel)) in Ilan Area by Population Fluctuation and Fruit Damage Rate Assessments
Date Issued
2006
Date
2006
Author(s)
Lin, Ren-Wei
DOI
zh-TW
Abstract
The improved McPhail traps baited with a poisoned methyl eugenol (ME) board or Nu-lure were used in the orchards to monitor the fruit fly population where the area-wide control fruit fly in major fruit production townships in Ilan was conduced. Meanwhile we investigated the damage rate of fruits in these area as well as farmers’ opinion about the area-wide control. The results showed that the male and female population of flies fluctuated synchronously. There was a high correlation between the number of male flies (X) captured by ME and the number of females (Y) captured by the Nu-Lure traps (r = 0.74, p < 0.01). Preliminary analysis revealed that these variables can be expressed as ln = 0.10 – 0.29lnX + 0.15lnX2 (R2 = 0.70, p < 0.001). Results showed that control efficiency reached 95% by 1 and 2 years after guava tree removal. Data analysis indicated that the male fly numbers between Dongshan and other township without area-wide control (AWC) since 2003 were not significantly different (F = 4.7, df = 1.0, p < 0.08). Similarly, the male fly numbers between major fruit production townships with AWC and other townships without AWC since 2003 were not significantly different (F = 3.4, df = 1.0, p = 0.07). The damage rate of pomelo orchards in Dongshan township was below 4.4%. However, the damage rate in abandoned wax apple orchards was higher than 90%. Preliminary analysis reveals that the number of females (X) captured by Nu-Lure trap and the average damage rate of pomelo (Y) can be expressed as = 1.12ln(lnX) + 1.61 (R2 = 1.0, p = 0.03). And, in 2004 the mean number of females (X) and the average damage rate of wax apple (Y) captured by Nu-Lure traps can be expressed as sin-1 = 0.07ln(lnX) + 1.37 (R2 = 1.0, p = 0.001). The validity of these equations needs further test in the future. According to the result of questionnaires, farmers considered that the most efficient methods to control fruit flies were bagging (53.2% farmers) and sanitation (60.6%). Though farmers generally satisfied with the result of area-wide control, the numbers of insecticide used were not reduced (61.6% farmers).
Subjects
東方果實蠅
區域防治
蛋白質水解物
甲基丁香油
捕獲蟲數
果實受害率
Bactrocera dorsalis
area-wide control
protein hydrolysate
methyl eugenol
captured fly number
damage rate of fruits
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-95-D84624103-1.pdf
Size
23.53 KB
Format
Adobe PDF
Checksum
(MD5):aa220c1a56c3cde441c358129bc407a1