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Issue:ISSN 2095-1353
           CN 11-6020/Q
Director:Chinese Academy of Sciences
Sponsored by:Chinese Society of Entomological;institute of zoology, chinese academy of sciences;
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Your Position :Home->Past Journals Catalog->2013年50 No.4

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Key Words:biodiversity, organic paddy, parasitic enemies, pests
Abstract:The movement of natural enemies into organic rice fields beside a ridge on which soybean and maize were planted was compared to that into a control rice field with no soybean or maize crops nearby. We found that significantly more natural enemies moved into rice fields from soybean than from maize habitat. Parasitism rates of the eggs of Chilo suppressalis, Tryporyza incertulas, Cnaphalocrocis medinalis cnienee, and Nilaparvata lugens in the organic rice field adjacent to soybeans were 178%, 203%, 102%and 124%, respectively, which were 43%,75%,21%and 34%higher than those observed in the control. Parasitism rates on eggs of the four pests in the organic rice field adjacent to maize were 103%, 44%, 86%and 93%, respectively, which were 32%, 16%, 05%and 03%lower than in the control. The rates of occurrence of larvae or nymphs of the four pests in rice adjacent to maize were 103%, 194%, 175%and 26%, respectively, which were differences of +09%, -25%, +19%and -19%respectively, compared with the control. These results provide important information for the biological control of crop pests.
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