Development of 8-armed airflow olfactometers for measuring olfactory responses of insect predators
1994
Liu, B. (Bonn Univ. (Germany). Inst. of Phytopathology) | Sengonca, C.
In the present study two types of 8-armed airflow olfactometers are developed, one is for individual test, called the individual olfactometer, another is for population test, called the population olfactometer. Both of them consist of an exposure chamber, 8 odour arms, 8 odour chambers and a sample plate or a sample chamber. In the former, the odour chamber is movable for regulating the distance between an odour source and the exposure chamber. In the latter, the sample chamber can be driven up and down to control the predator population under test to be exposed to the exposure chamber at the same time, and the odour chambers are designed for two functions viz., for placing odour sources and for catching the predator reaching them. By means of NH4CL smoke tests, it is clear that the odour airflows in both apparatus are separated in the outward area of the exposure chamber and gradually unified around the center to form the combination of the odour fields, from which the predator under test begins searching the odours. The control tests for random distribution in both apparatus have been conducted to provide the evidence that the same odour source in all odour chambers causes the random selection by the predator. The one-odour tests have been executed to prove the sensitivity of both apparatus for testing insect kairomone responses
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