Journal
PEST MANAGEMENT SCIENCE
Volume 77, Issue 3, Pages 1452-1464Publisher
JOHN WILEY & SONS LTD
DOI: 10.1002/ps.6164
Keywords
Isaria javanica; Nilaparvata lugens; entomopathogenic fungus; brown planthopper; rice; sustainable pest control
Categories
Funding
- Science and Technology Planning Project of Guangzhou City [202002020029]
- National Key R&D Program of China [2018YFD0200305]
- Science and Technology Planning Project of Guangdong province [2019B020217003, 2016A050502049]
- National Key Technology Support Program China [201303019-02]
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Isaria javanica fungus shows good control efficacy against brown planthopper, serving as an alternative to common insecticides. The granular formulation of I. javanica demonstrates prolonged field persistence and improved pest control coverage.
BACKGROUND The brown planthopper (Nilaparvata lugens) is an insect pest of rice (Oryza sativa) that is distributed worldwide and is responsible for significant crop yield losses. Of particular concern, N. lugens has developed high resistance to several commonly used insecticides. The entomopathogenic fungus, Isaria javanica, offers an alternative to insecticides for the control of rice plant pests. RESULTS We show that I. javanica caused high mortality of N. lugens nymphs and reduced the survival and fecundity of newly emerged adults in I. javanica-treated insects. I. javanica persisted on plants up to 17 days after its inoculation under greenhouse conditions carried out in summer and autumn. Rice metabolites supported conidial germination and mycelia growth of I. javanica. A granular formulation of I. javanica conidia controlled N. lugens populations in a field experiment. The granular formulation promoted fungal survival and growth in the field up to 28 days post inoculation, resulting in increased fungal persistence and greater pest control coverage. CONCLUSION These data indicate that a granular formulation of I. javanica is able to control N. lugens populations in rice fields. Therefore, this granular formulation can be an alternative to insecticides and can be used in organic fields.
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