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Effect of fruit damage on infestation of Drosophila suzukii (Diptera: Drosophilidae)
Md. Arefur Rahman,Seung-Hwan Yun,Jingu Lee,Eunhye Ham,Jun-Seok Lee,Un Taek Lim 한국응용곤충학회 2018 한국응용곤충학회 학술대회논문집 Vol.2018 No.10
Drosophila suzukii (Matsumura) is one of the most destructive pest of thin-skinned fruits such as blueberry, strawberry, raspberry, and cherry. We tested effect of fruit damage on the infestation of D. suzukii by using partially peeled blueberry fruits in assays of behavioral choice and development. In choice test, D. suzukii preferred partially peeled blueberry fruit than normal. But in development test, we did not found difference in adult emergence rate between normal and partially peeled blueberry fruit.
Prey Preference of Native Minute Pirate Bug Orius minutus (L.)
Md. Arefur Rahman,Souvic Sarker,Eunhye Ham,Jun-Seok Lee,Un Taek Lim 한국응용곤충학회 2018 한국응용곤충학회 학술대회논문집 Vol.2018 No.04
A native minute pirate bug, Orius minutus (L.), is a generalist predator of small insect pests such as thrips, mites, scale, etc. By comparing with Tetranychus urticae Koch in choice test, we evaluated the prey preference by counting number of prey killed for 4 hours on Amphitetranychus vienensis (Zacher), Frankliniella intonsa (Trybom), Stephanitis pyrioides Scott, and Eriococcus sp. nymph. Among them F. intonsa was the only one killed more than T. urticae by O. minutus. In no choice test, mean number of prey killed was highest in F. intonsa (7.2) followed by T. urticae (3.0), A. vienensis (2.4), Eriococcus sp. (2.0), and S. pyrioides (0.0) for 4 hours. This experiment shows that O. minutus could be a good predator for F. intonsa and T. urticae.
Rahman Md. Arefur,Sarker Souvic,함은혜,Lee Jun-Seok,Lim Un Taek 한국응용곤충학회 2022 Journal of Asia-Pacific Entomology Vol.25 No.2
Orius species (Hemiptera: Anthocoridae) are generalist predators of small insects, including thrips, mites, aphids, and scales. Here, we evaluated the prey preference of Orius minutus (L.) on five prey species by comparing it with Tetranychus urticae Koch (Acari: Tetranychidae) as a standard prey. Among five prey species tested, Frankliniella intonsa (Trybom) (Thysanoptera: Thripidae) and Hyalopterus pruni (Geoffroy) (Hemiptera: Aphididae) were preyed on more than T. urticae by O. minutus in a four hour choice test. In a four hour no-choice test, F. intonsa was the most frequently consumed prey, followed by H. pruni, T. urticae, Amphitetranychus viennensis (Zacher) (Acari: Tetranychidae), Eriococcus sp. (Hemiptera: Eriococcidae), and Stephanitis pyrioides Scott (Hemiptera: Tingidae). The functional response of O. minutus in response to various densities of adult T. urticae on kidney bean leaf was compared with that of the commercialized species Orius laevigatus (Fieber). Different numbers of adult T. urticae (5, 10, 20, 40, 80, and 120) were offered to females of both predators for 24 h in a controlled environment of 25.0 ± 0.5 ◦ C, 71.2 ± 5.0% RH, and a 16: 8 h (L: D) photoperiod. Both O. minutus and O. laevigatus exhibited a Type III response according to a logistic regression model. Despite the similar attack rate or handling time found between the two species, predation rate was higher on O. minutus than on O. laevigatus. These results indicate that O. minutus could also play an important role in the biological control of T. urticae as well as F. intonsa and H. pruni.
Md. Arefur Rahman,Eunhye Ham,Jun-Seok Lee,Un Taek Lim 한국응용곤충학회 2019 한국응용곤충학회 학술대회논문집 Vol.2019 No.04
Minute pirate bug, Orius minutus (L.), is a native predator of many small insects such as aphid, scale, thrips, and mites in Korea. Seven chemical pesticides with lower ecotoxicity being used to control those pests were evaluated for acute toxicity against adult female O. minutus in glass scintillation vial assay. In the 1st batch experiment with three pesticides, flonicamid and buprofezin were least toxic whereas in the 2nd batch experiment with four pesticides spirotetramat and spiromesifen showed least toxicity. The corrected mortality of buprofezin and flonicamid became 100% on 55 and 47 h of exposure in 1st batch and that of spirotetramat and spiromesifen became 100% on 75 and 71 h of exposure in 2nd batch, respectively. In conclusion, flonicamid, buprofezin, spirotetramat, and spiromesifen was least toxic among the seven pesticides tested against adult female of O. minutus.
Bikash Bhusal,Md. Arefur Rahman,Un Taek Lim 한국응용곤충학회 2018 한국응용곤충학회 학술대회논문집 Vol.2018 No.04
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.