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1) Fourarm olfactometer experiments further showed that the plant volatiles of S. nodiflora played a repellent effect on P. xylostella.

2) In the Y-shaped olfactometer, the rate(34.38%)of P. pseudoannulata females choosing prey direction was significantly higher than that of choosing without preys(6.25%).

3) Methods In laboratory Y-shape olfactometer was used under dynamic airflow in this study.

4) A specially designed two-choice olfactometer that joined to air filter with activated charcoal was utilized in judging the preference of insects between two materials.

5) The repellency percentages of 12 spices and the agaropectins from their CH2Cl2 extracts to the adults of Callosobruchus chinensis in a two-choice olfactometer were tested in the laboratory.

6) Methods Ethanol extractions of five plants were tested for repellence against the female adults of Cx. pipiens pallens with a "Y" olfactometer.

7) Methods:Food attractants to Blattella germanica were screened using four arm olfactometer,(http://sentencedict.com/olfactometer.html) and different baits which contained food attractants and pesticides were assessed in laboratory.

8) The host selection and development of Oligonychus perditus on 4 species of cypresses were studied with Y-tube olfactometer and subculture.

9) The orientational behavior of the 1st- and 3rd- instar larvae of the striped stem borer (SSB, Chilo suppressalis) to the volatiles emitted from rice plants was studied with a Y-tube olfactometer.

10) Provided with additional fresh hosts at emergence and the early stage of adult, the females showed no increased preference to volatiles in the Y-tube olfactometer .

11) The learning behavior of Scleroderma sichuanensis Xiao fed on the fictitious hosts Tenebrio molitor L. in the process of host foraging was studied using Y-tube olfactometer .

12) The odor preference of adult M. domestica was measured using a Y-tube olfactometer.