Horticulture, Environment, and Biotechnology : HEB

Korean Society of Horticultural Science (한국원예학회)
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Application of an IPM-based Spray Program to Protected Cultivation of Strawberry in Korea

Nam, Myeong-Hyeon;Kim, Hyeon-Suk;Lee, Won-Keun;Seong, Yeol-Kyu;Gleason, Mark. L.;Song, Jeong-Young;Kim, Hong-Gi

  • Published : 20081000
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Abstract

An IPM-based spray program (ISP), based on ecological and agronomic information, is necessary for reducing pesticide sprays and producing strawberries safely. In this study, the applicability of ISP to safe production of strawberries was compared with a conventional spray program (Con-SP) during the 2005-2006 and 2006-2007 seasons in plastic houses in Nonsan, Korea. The ISP program consisted of fungicide, insecticide, and miticide treatments as well as release of natural enemies before and after harvest. The ISP treatment schedule was as follows: dipping transplants in azoxystrobin before transplanting (mid-September); spraying with abamectin and thiacloprid when black mulch was applied (early October); spraying with pyraclostrobin + acetamiprid and tetraconazole + abamectin before blooming in early and mid-November, respectively; transplanting banker plants colonized by Aphidius colemani in mid-February (2005-2006 season) or November (2006-2007 season); and releasing Phytoseiulus persimilis in mid-March. Number of pesticide sprays per season for ISP and Con-SP was five and nine, respectively. Anthracnose crown rot, caused by Colletotrichum gloeosporioides, did not occur in ISP in either season, but incidence was ≤ 3.3% in Con-SP during the 2005-2006 season. Powdery mildew (Sphaerotheca aphanis var. aphanis) did not occur during harvest in ISP, but occurred during early and late harvest stages in Con-SP in both years. Incidence of Botrytis fruit rot did not differ between ISP and Con-SP. Two-spotted spider mite (Tetranychus urticae) did not appear until March in ISP; subsequently, spider mite density remained at ≤-0.5 mite per leaf until the last harvest period in both years. The number of spider mites in ISP and Con-SP during the harvest did not differ. Populations of cotton aphids (Aphis gossypii) were also higher in ISP than Con-SP but decreased from March to April, accompanied by production of aphid mummies by A. colemani. The results showed that ISP was more effective than Con-SP, and required fewer pesticide sprays.

Keywords

References

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