본 연구는 쌀을 비롯한 저장곡물을 가해하는 어리쌀바구미(Sitophilus zeamais) 성충에 대해서 8종의 식물정유의 훈증독성과 Y-tube를 이용한 후각반응으로 기피효과를 조사하였다. 10㎕/L air의 농도에서 훈증독성시험 결과 pennyroyal과 tea tree 오일에서 각각 97%, 63%의 높은 살충효과를 보였다. 특히, pennyroyal oil(LT50, hour=3.87)은 tea tree oil((LT50, hour=4.09)보다 높고 빠른 살충력을 보였다. 10㎕/filter paper의 농도에서 후각계를 이용한 기피효과는 Cedarwood(80%), Cinnamon(83.3%), Cypress(81.1%), pennyroyal(97.1%) oil이 높은 기피활성을 보였으며, 이보다 낮은 1㎕/filter paper의 농도에서도 Cinnamon(82.4%), Cypress(80.0%), pennyroyal(86.7%) 오일은 높은 기피활성을 나타냈다.

본 연구는 쌀을 비롯한 저장 곡물을 가해하는 어리쌀바구미(Sitophilus zeamais) 성충에 대해서 8종의 식물정유의 훈증독성과 후각계(ID 1.5cm, arm 12cm, stem 15cm)를 이용한 기피효과를 조사하였다. 10㎕/L air의 농도에서 훈증독성시험 결과 pennyroyal과 tea tree의 오일에서 각각 97%, 63%의 높은 살충효과를 보였다. 특히, pennyroyal oil(LT50, hour=3.87)은 tea tree oil((LT50, hour=4.09)보다 높고 빠른 살충력을 보였다. 10㎕/filter paper(∅ 5.5cm)의 농도에서 후각계를 이용한 기피효과는 Cedarwood(80%), Cinnmon(83.3%), Cypress(81.1%), pennyroyal(97.1%) oil이 높은 기피활성을 보였으며, 이보다 낮은 1㎕/filter paper(∅ 5.5cm)의 농도에서도 Cinnmon(82.4%), Cypress(80.0%), pennyroyal(86.7%) 오일은 높은 기피활성을 나타냈다.

This study was conducted at rearing room to investigate the feeding behavior of fruits in the firefly (Pylocoelia rufa) larvae and the ovipositional characteristics of the adults. As a result, the pear, apple, melon, persimmon, mandarin, grape and peach were shown the feeding behavior of larvae the average 6.40, 3.25, 2.50, 2.20, 2.00, 1.40 and 1.25, respectively. However, the larvae were not shown at all feeding behavior to banana. The hours feeding behavior of firefly larvae was primarily from 8:00 pm until 2:00 am. In addition, the time at which the voracious feeding behavior was until 8:00 pm to 12:00 pm. The 6:00 pm began whisking all the larvae are hiding in the shelter. In the case of the firefly larvae fed only the edible snail, the adults were oviposition an average 49 ± 6 eggs. At that time larva stage, adults of the firefly eating the pears, apples, melon and eat edible snail at the same time there were oviposition the 53 ± 7 on average. In the case of fruits, the pears, apples, and melons has been considered worthy to take the firefly larva fed with the current land snails.

In the growth of the Rubus coreanus Miquel fruits, the unripened (10 days) and ripened (25 days) fruits after flowering were harvested. The chemical characteristics of different maturational stages of the unripened and ripened fruits were investigated. Total amount of phenolic compounds was 4.00-7.56% in the unripened fruits and 3.78-5.57% in the ripened fruits, respectively. Furthermore, total amounts of organic acids such as malic, citric, succinic, and oxalic acids were 16.40 mg/ 100 g in the unripened fruits and 28.82 mg/100 g in the ripened fruits, respectively. In organic acids of the unripened and the ripened fruits, citric acid (8.76-15.47 mg/100 g) was the highest amount among other organic acids. Soluble sugars were significantly increased from 11.07 to 21.54% in the unripened and ripened fruits. Therefore, ripened fruits had the high levels of phenolic compounds, organic acids and soluble sugars. For the biological studies of R. coreanus, methanol extracts of R. coreanus leaves, fruits, and stems were evaluated for their insecticidal activities against Myzus persicae (Hemiptera: Aphididae), Plutella xylostella (Lepioptera: Plutellidae) and Spodoptera litura (Lepioptera: Noctuidae) by leaf dipping method. From these results, the extract of R. coreanus leaves revealed potent insecticidal activity against P. xylostella. However, the methanol extracts of R. coreanus fruits and stems had no any insecticidal activity against M. persicae, P. xylostella and S. litura. The R. coreanus leaves have promising potential as new insecticidal agent against P. xylostella.