최근 3년간 알락하늘소(Anoplophora malasiaca = A.chinensis)는 2020년 제주 감귤 농장을 시작으로 2023년에는 블루베리 농장에서 대량으 로 발생하여 이를 생물학적으로 방제방법을 개발하고자 알락하늘소의 기초생태와 인공증식 방법을 연구하였다. 충청남도 천안시 블루베리 시설하 우스 기준 6월에 대량 발생하였으며, 암컷보다 수컷이 많이 채집되었다. 산란은 나무 기저부에서 발견되었다. 인공사육 결과 26°C 사육 후 10°C 월동자극 30일 투입 시 유충 207~243일, 번데기 14~15일, 성충 37~64일로 263~338일의 생활사를 가지며 유충은 5°C에서 30일 월동자극으로 번데기 용화를 촉진할 수 있었다. 성충은 바닥재와 나뭇가지 하단부가 만나는 지점의 수피와 목질부사이에 산란하였으며, 블루베리 나뭇가지의 하 단 기준 2cm 직경에서 산란량이 가장 많았으며, 수종별 산란량은 새순 급이 버드나뭇가지에서 산란량이 가장 많았다. 본 연구에서는 알락하늘소의 산란, 유충 성장, 월동자극 조건을 구명하였으며, 이 결과는 향후 생물학적 방제 및 인공사육 효율 향상에 기초 자료로 활용될 수 있다.

The two-spotted spider mite, Tetranychus urticae Koch, is one of the economically important agricultural pests globally, as it attacks a wide range of vegetable and horticultural crops. In this study, we evaluated spatial repellent and oviposition deterrent activities of T.urticae in response to fifteen compounds derived from ester-containing natural products. To evaluate the tests, we used bridge two-choice test and host two-choice test in laboratory conditions. Among the eight compounds showed spatial repellent and oviposition deterrent activities against T. urticae at the 20 mg dose and some compounds had the activities at lower dose. We also conducted two-choice test with a blend and single compounds to determine which showed stronger spatial repellent and oviposition deterrent activities. In host two-choice test, we evaluate repellence between distance of compounds. This study concluded that series compounds from ester-containing natural products have the potential to be used managing T. urticae in the field.

The oriental fruit fly, Bactrocera dorsalis, is one of important agricultural pests that attack a wide range of fruits and vegetables. Adult female can cause direct damage by laying eggs under the skin of fruits and vegetables. The eggs hatch into larvae that feed in the decaying flesh of the agricultural crops. Damaged fruits and vegetables quickly become inedible or dropto the ground. We investigated the oviposition characteristics of B. dorsalis on twelve fruits and seven vegetables. B. dorsalis marked the oviposition places on every crop tested. B. dorsalis laid eggs into the fruits and vegetables except lemon and passionfruit. We examined the adult emergence from infested crops.

The two-spotted spider mite, Tetranychus urticae Koch, is one of the most important agricultural pests. Therefore, we screened fifteen compounds from natural products for their spatial repellent and oviposition deterrent activities against T. urticae in the laboratory by using two-choice and no-choice tests. In the bridge two-choice test, nine compounds showed the spatial repellent effects on T. urticae at 20 mg dose, resulting in reduced numbers of eggs. Among the nine compounds, at 2 mg dose, two compounds were selected as having more spatial repellent activity than the others. The two compounds also showed spatial repellent and oviposition deterrent effects in the two-choice test from hosts. In the no-choice test from a host, the spatial repellent effects of the two compounds to T. urticae were significantly stronger than that of controls. These results suggest that the findings can be used as potential agents for the prevention and population control of T. urticae in the field.

The effect of five different constant temperatures (18, 21, 24, 27, and 30±1°C) and a photoperiod of 14 : 10 (L : D) h on the reproduction parameters of Spodoptera frugiperda was studied. The longevity of adult female S. frugiperda decreased with increasing temperature (22.4 days at 21°C and 13.9 days at 30°C) but not at 18°C. The pre-oviposition period and oviposition period was the shortest at 30°C compared to the other temperatures. The total fecundity egg count was 887.4, 1,246.4, 1,348.9, 1,154.9, and 1,034.2 at 18, 21, 24, 27 and 30°C, respectively, during its life span. The survival rate of female S. frugiperda decreased rapidly after 13 days at 18°C, after 14 days at 21°C, after 15 days at 27°C, and after 9 days at 24°C, and 30°C. On the third day after the start of oviposition, 50% of the total fecundity was accomplished. In corn fields at less than the 10-leaf stage, the distribution of S. frugiperda egg masses was observed in the middle and lower plant regions, corresponding to 46.8% and 41.4% of the total egg masses, respectively. Egg masses were mostly found on the underside of the leaf blade (abaxial) of corn (66.7%). After releasing S. frugiperda adults on May 12, May 17, May 25, and May 30, the number of eggs per egg mass was 89.9, 88.5, 126.6, and 127.9, respectively. Egg masses of the subsequent generations of S. frugiperda were observed from late June, and the number of eggs per egg mass was 155.8 in late June, 270.7 in early July, and 303.5 in mid-July.