Yeast or no?: the attractiveness of yeast-based baits to fruit flies (Bactrocera spp. (Diptera: Tephritidae)

Issue Date

10-2011

Abstract

The effect of baits prepared from brewery waste, Brewer's yeast, Baker's yeast and autolysed yeast on fruit flies, Bactrocera occipitalis and B. philippinensis, was studied under laboratory and field conditions. In the laboratory, protein-deprived flies were subjected to an attractancy experiment in a choice test and a feeding experiment in a no-choice test. Field test was conducted in the UPLB fruit orchard using an improvised trap to evaluate the respective baits in capturing wild population of fruitflies. Baits in the laboratory and field tests were correlated to their protein crude content and pH. The attractancy experiment showed that the response of B. occipitalis and B. philippinensis varied with age and sex. Young female and old male flies of both species were attracted most to baker's yeast while the young male counterparts to brewer's yeast. Old female flies of B. philippinensis, on the other hand, were most attracted to autolysed yeast. The feeding experiment showed that baker's yeast has a potential as bait for both occipitalis and B. philippinensis and that sex and age to bait was not much of a factor. In the field test, autolysed yeast outperformed baker's yeast in capturing wild population of fruit flies of both sexes, followed by baker's yeast. The variation in the results of the laboratory and field trials could not be attributed to the differences in crude protein content and pH of the baits. Autolysed yeast had the lowest crude protein content while baker's yeast had the highest. All bait formulations were basic except for brewery waste.

Source or Periodical Title

Philippine Entomologist

ISSN

0048-3753

Volume

25

Issue

2

Page

203-204

Document Type

Article

Frequency

semi-annually

Language

English

En – AGROVOC descriptors

BACTROCERA; TEPHRITIDAE; BAITS; ATRRACTANTS; PEST CONTROL BAITS; BREWERS' YEAST; YEAST

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