We evaluated three previously known repellents of Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), i.e., carvacrol, cis-jasmone, and methyl jasmonate for the attraction of commercialized predators, Orius laevigatus (Fieber) (Hemiptera: Anthocoridae), and native predator, O. minutus (L.), in Y-tube olfactometer. Higher proportion of O. laevigatus (mated unfed adult females) moved to the arm of methyl jasmonate or cis-jasmone than the arm of clean air. However, O. minutus did not show any significant preference to the chemicals tested. These results suggest that, among the tested chemicals, methyl jasmonate or cis-jasmone would be a good attractant for O. laevigatus.

The western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), is an important pest of horticultural and agricultural crops worldwide. The repeated use of chemical insecticides resulted in the development of insecticide resistance. We evaluated response of F. occidentalis to three synthetic herbivore-induced plant volatiles (HIPVs), methyl salicylate, methyl anthranilate, and nonanal known as attractants of thrips’ natural enemy, in Y-tube olfactometer. Mated fed adult females of F. occidentalis showed lowest response rate to methyl salicylate than methyl anthranilate, and nonanal. These results show that methyl salicylate may act as repellent to F. occidentalis, and can be used as a component of push-pull strategies for the management of F. occidentalis.

Orius spp. (Heteroptera: Anthocoridae) prey on small arthropods such as aphids, thrips, whitefly, and mites both in greenhouse and field. Use of chemical attractants to natural enemies can improve the efficacy of biological control through push-pull strategy. We compared attractiveness of three synthetic herbivore-induced plant volatiles (HIPVs), i.e., nonanal, methyl anthranilate, and methyl salicylate for thrips natural enemies, O. laevigatus (Fieber) and O. minutus (L.), in Y-tube olfactometer. Mated unfed adult females of O. laevigatus showed higher choice rate to methyl anthranilate or methyl salicylate than nonanal. Orius minutus showed higher choice rate to methyl anthranilate than methyl salicylate or nonanal. These results suggest that, among the three HIPVs, methyl anthranilate can be used for the attractant of both O. laevigatus and O. minutus.

Frankliniella intonsa (Trybom) (Thysanoptera: Thripididae) is an important pest of field and greenhouse crops such as pepper and strawberry. Chemical attractants are commonly used for monitoring thrips, but few are available for F. intonsa. Thus, we evaluated three attractants of Frankliniella occidentalis known from literatures for their attraction of F. intonsa in Y-tube olfactometer. Fed unmated adult females of F. intonsa showed higher initial response to (S)-(−)-verbenone than other attractants, i.e. aggregation pheromone of F. occidentalis and methyl isonicotinate. Unfed mated adult females of F. intonsa showed similar initial response. These results suggest that (S)-(−)-verbenone also can be used for monitoring and further in behavioral control tactics of F. intonsa.

알락수염노린재의 주요 페로몬 성분을 찾기 위하여 알락수염노린재 헥산추출물에 대하여 GC-MS 및 GC-EAD 반응을 분석하였고, GC-EAD에 반응한 물질에 대하여 Y-tube Olfactometer로 알락수염노린재의 유인반응을 조사하였다. 알락수염노린재의 주요 헥산추출물은 (E)-2-hexenal, 4-Oxo-(E)-2-hexenal, (E)-2-hexenyl acetate, (E)-2-octenal, n-undecane, n-dodecane, (E)-2- decenal, n-tridecane, (E) and (Z)-2-decenyl acetate, pentadecane, tetradecyl isobutanoate, (Z)-9-octadecenoic acid methyl ester 및 기타 미동정 물질 등이 다수 존재하였다. 특히 암컷 알락수염노린재에는 수컷 노린재에는 없는 E-5-decenyl acetate의 함량이 매우 많았다. 알락수염노린재 헥산추출물에 대한 알락수염노린재 암․수의 안테나 반응은 retention times 4.1～ 4.2(retention index 850～860 : E-2-hexenal), 4.7 부근(retention index 960 : 4-oxo-E-2-hexenal)과 6.8 부근(retention index 1290～1305 : Tridecane)의 화합물에 대해 암․수 모두 동일한 안테나 반응을 보였다. 알락수염노린재에 대한 Y-tube Ocfactometer 시험에서 알락수염노린재의 최초 이동방향이 수컷은 E-2-decenal(100%), E,E,Z-2,4,6-decatrienoate(80%), n-tridecane (70%) 및 E-2-hexenal(60%) 순이었고, 암컷은 n-tridecane(80%), 4-oxo-E-2-hexenal (60%), E-2-decenyl acetate(60%), Z-2-decenyl acetate(60%), E,E,Z-2,4,6-decatrienoate (60%) 등의 순이었다. 특히 Tridecane과 갈색날개노린재 집합페로몬인 E,E,Z-2,4,6-decatrienoate는 알락수염노린재 암․수 모두에서 높은 유인효과를 나타내었다.