Showing papers on "Dacus published in 2003"
TL;DR: Favorable microclimate, created by a standing water pool, appeared to be responsible for increased trap captures during the hot summer months, and the positive role of the olive tree fruit load is discussed.
Abstract: The spatial distribution of olive fruit flyBactrocera (Dacus) oleae (Gmelin) (Diptera: Tephritidae) field captures with McPhail traps within an experimental orchard was evaluated. Contour maps were constructed to examine the patterns in the 3-year trapping data. Captures varied widely inside the olive orchard, with traps suspended on wild olive trees exhibiting the poorest performance. Favorable microclimate, created by a standing water pool, appeared to be responsible for increased trap captures during the hot summer months. The positive role of the olive tree fruit load is also discussed.
26 citations
TL;DR: Fruit-survey data indicated that there were only four economic species in the Solomon Islands: Bactrocera frauenfeldi was identified as the only generalist fruit fly species present, and many potential export crops were not hosts for any fruitFly species.
Abstract: Tephritid fruit flies were surveyed using male lure Steiner traps and by collection of host fruits over a 4-year period (June 1994-June 1998) throughout the nine provinces of the Solomon Islands. The purpose of the survey was to determine which species were present, which were most abundant, and which commercial and non-commercial fruits were hosts for fruit flies. A total of 1 051 493 fruit fly specimens were collected in 1726 trap collections from 117 sites. Sixty-three per cent of trap collections were made on the island of Guadalcanal. Overall, 37 fruit fly species were recovered from trap samples, with 79% and 21% of specimens from cuelure and methyl eugenol traps, respectively. The species most common in cuelure traps were Bactrocera frauenfeldi (Schiner) (mango fly), B. moluccensis (Perkins), B. simulata (Malloch), Dacus solomonensis Malloch and B. redunca (Drew). The species most common in methyl eugenol traps were B. umbrosa (Fabricius), B. froggatti (Bezzi) and B. pepisalae (Froggatt). With the exception of B. cucurbitae (Hendel), all common species were recovered in all provinces. B. cucurbitae was the only non-indigenous fruit fly species collected. The number of fruit fly species recovered in each island group was significantly and positively related to trapping intensity. A total of 2527 fruit samples were collected to determine host relationships for fruit flies. Tephritid fruit flies were reared from fruits of 25 of the 67 commercial plant species sampled. However, fruit-survey data indicated that there were only four economic species in the Solomon Islands: (i) B. frauenfeldi; (ii) B. umbrosa; (iii) B. cucurbitae; and (iv) D. solomonensis. Bactrocera frauenfeldi was identified as the only generalist fruit fly species present, and many potential export crops were not hosts for any fruit fly species. These facts emphasise the importance of effective quarantine measures to prevent the accidental introduction of exotic fruit fly pests that might limit or complicate the development of an export industry for fruits and vegetables.
15 citations
3 Sep 2003
TL;DR: Fruits were taken soon after they fell off or at their normal harvest time, whichever came first, then were weighed and incubated in the laboratory to observe the fruit fly emergence and showed that fruit wrapping significantly reduced the fruitFly infestation and suppressed the Fruit fly population on cucumber or peria fruits.
Abstract: Dacus cucurbitae ( Diptera: Trypetidae) attacks on cucumber and peria fruits wrapped at cherelle stage. The fruit flies were important pests of cucumber (Cucumis sativus L) and peria (Memordica charantia L.). The flies attacked fruits by laying egg on the fruit surface and their developing immatures caused serious damages from the inside. The objective of this experiment was to determine the effect of the fruit wrapping at cherelle stage on fruit fly infestation on cucumber or peria fruits. The experiment was conducted in villages of Terbanggi Besar (Central Lampung) and Jati Agung (South Lampung) during October—November 2001. A set of cherelle stage fruits, i.e. those just shed off their florescence, were wrapped using plastic bags while another set of adjacent fruits were left unwrapped. Fruits (treated or untreated) were taken soon after they fell off or at their normal harvest time, whichever came first, then were weighed and incubated in the laboratory to observe the fruit fly emergence. The results showed that fruit wrapping significantly reduced the fruit fly infestation and suppressed the fruit fly population on cucumber or peria fruits. The wrapped fruits weighed more than unwrapped fruits
6 citations