국내 자생종인 긴털이리응애(Amblyseius womersleyi Schica)와 도입종인 Amblyseius fallacis Garman, Typhlodromus occidentalis Nesbit 등 3종 이리응애의 감귤원 귤응애에 대한 포식능력과 피식자에 대한 밀도억제효과를 사육실(, RH 65%, 16L : 8D)에서 조사한 결과는 다음과 같다 귤응애 알에 대한 포식량은 A. fallacis 20: 1개, 긴털이리응애와 T. occidentalis는 각각 1.1개와 9.1개였다. 귤응애 유충과 제1약충 그리고 제2약충에 대해 긴털이리응애는 각 23.8, 16.5, 9.0마리, A. fallacis는 각 26.1, 18.2, 7.4마리 그리고 T. occidentalis는 각 7.8, 4.2, 4.2마리를 포식하였다. 20:1의 비율에서 귤응애 밀도억제효과는 긴털이리응애와 A. fallacis는 효과가 좋았으나 T. occidentalis는 효과가 매우 낮았다. 에서 알에서 우화까지의 발육기간은 긴털이리응애는 6.1일, A. fallacis는 5.9일로 두 종간에 유의차는 없었다

날개가 없는 몇몇 절지동물들은 공중이동을 하기 위한 수단으로써 이륙행동 보이는 종들이 있다. 본고는 포식성 이리응애류중에서 이륙행동을 보이는 종(Neoseiulus fallacis (Carman)) 과 이륙행동은 보이지 않으나, 공중이동률이 높은 종(Phytoseiulus persimilis Athias-Henriot),이륙행동이 없고 공중이동률이 중간치인 종(N. ca1ifornicus(McGregor))간에 공기역학적 측면에서 어떠한 메커니즘이 작용하는 지에 관한 연구이다. 위 종들의 도보이동 자세와 공주 이동 이륙행동 자세의 몸체의 수직적 위치, 몸체의 크기, 다리의 길이 등의 자료를 가지고 공기역학적 파라미터를 계산한 결과, P. persimilis는 도보이동 자세에서도 N. fallacis가 이륙행동을 보여야만 얻을 수 있는 양의 항력을 얻을 수 있음이 밝혀졌다. 이러한 관점에서 포식성 이리응애류의 이륙행동 진화에 대한 고찰하였다.

점박이응애(Tetranychus urticae Koch)를 먹이로 제공하여 3종 이리응애의 발육 및 포식량을 조사한결과는 다음과 같다. 20, 23, 25, 0.5에서 발육기간은 Amblyseius womerslryi Schica 각 11.5, 7.7, 6.7, 5.6일이었으며, Amblyseius fallacis Garman과 Typhlodromus occidentalis Nesbit는 약간 짧았으나 큰 차이는 없었으며, 에서 보다 1/2이하로 짧았다. 이리응애의 발육임계온도와 유효적산 온도는 암.수간에 차이가 없었고, 암컷을 기준으로 볼 때 A. womersleyi가 각 , 111.6일도, A. fallacis는 각 , 86.0일때도, T. occidentalis는 각 , 94.1 일도였다. 에서 3종이리응애 암성충의 평균수명은 A. womersleyi 8.67일, A. fallacis 7.81일, T. occidentalis 5.66일이었고, 총산란수는 각 11.93, 12.64, 8.86개였다. 이리응애의 전발육기간 동안 점박이응애 난 포식량은 20, 23, 25, 에서 A. womersleyi가 각 2.49, 2.00, 9.72.61, 2.33개로 온도별로 차이가 없었고, A. fallacis는 비슷하였으며, T. occidentalis는 2~5개 많은 경향이었다. 3종 이리응애 암성충의 점받이응애 나과 전약충에 대한 포식량은 온도별.먹이 태별로 별 차이가 없었다.

The differential susceptibility of the two spotted spider mite, Tetranychus urticae and its predator, Phytoseiulus persimilis against extracts of Gleditsia japonica var. koraiensis, Camellia sinensis, Cinnamomum cassia, Lantana camara and their mixtures was evaluated. The plant extracts tested were much less toxic to P. persimilis than to T. urticae. The plant extracts tested had little effect on the survival of P. persimilis adult females. Moreover, reproduction of P. persimilis adult females and eclosion of eggs deposited by treated predators were not seriously affected. The treatments of the plant extracts tested showed no serious toxic effect on P. persimilis eggs and exhibited 84∼100% hatchability. The treatments with mixtures 3 and 1 were effective against the adult females of T. urticae and yielded 76.0% and 72.7% adulticidal activity at 7 days after treatment, respectively. The treatment of mixture 2 revealed 63.3% adulticidal activity. Generally, the acaricidal activity of the individual treatment of each plant extract was lower than the mixtures. The adult females of T. urticae treated with mixtures 3 and 1 produced only 29.5∼31.3% as many eggs as the control females did. All the plant extracts tested exhibited no noticeable toxic effect to the eggs of T. urticae. These results suggest that mixtures 3 and 1 might be used for the control of T. urticae, and expected to be promising candidates for use in integrated mite management program with P. persimilis.

The susceptibility of the predatory mite, Neoseiulus californicus to extracts of Melia azedarach, Piper nigrum, Syringa velutina and their mixtures was evaluated in laboratory bioassays. In treatments with plant extracts tested, 76-86% of adult female predators survived after 7 days after treatment. Adult female predators treated with plant extracts tested produced 68.3-81.1% as many eggs as did control females and eclosion of eggs deposited by treated predators was not affected. Moreover, treatment of plant extracts tested showed no toxic effect on N. californicus eggs and produced 100% hatchability. Survival of N. californicus nymphs was not seriously affected by exposure to the plant extracts tested. Immatures of N. californicus survived on the leaf disc treated with plant extracts tested and 78-90% of immature predators reached adulthood. These results suggest that extracts of Melia azedarach, Piper nigrum, Syringa velutina and their mixtures expected to be promising candidates for use in integrated mite management program with N. californicus.

The susceptibility of the twospotted spider mite, Tetranychus urticae and the predatory mite, Phytoseiulus persimilis to extracts of Melia azedarach, Piper nigrum, Syringa velutina and their mixtures was evaluated in laboratory bioassays. Treatments of mixture 1 and 2 were effective against adult females of T. urticae and yielded 73.3 and 70.7% adulticidal activity at 7 days after treatment, respectively. Treatment of mixture 3 revealed 62.7% adulticidal activity. However, M. azedarach, P. nigrum and S. velutina had lower adulticidal activity than the other treatments. Adult females of T. urticae treated with mixture 1 and 2 produced only 11.1-16.7% as many eggs as control females did. All the plant extracts tested were ineffective to against the eggs of T. urticae. Plant extracts tested had little effect on the survival of P. persimilis adult females. Moreover, reproduction of P. persimilis adult females and eclosion of eggs deposited by treated predators were not seriously affected. Treatment of plant extracts tested showed no toxic effect on P. persimilis eggs and produced 100% hatchability. These results suggest that mixture 1 and 2 might be used for the control of T. urticae, and expected to be promising candidates for use in integrated mite management program with P. persimilis.