Entomologia Generalis (2022) 42, 549-557

Hao Liu, Xiao-Yun Su, Ze Sun, Chao Wang, Jin-Hua Shi, Caroline Ngichop Foba, Huanan Jin and Man-Qun Wang (2022)
Nitrogen and plant pathogens alter rice plant volatiles mediating host location behavior of Nilaparvata lugens and its parasitoid Anagrus nilaparvatae
Entomologia Generalis 42 (4), 549-557
Abstract: Nitrogen and phytopathogen alter plant organic volatiles that attract insect herbivores and their natural enemies. However, the interactive effects of nitrogen input and pathogen infection on volatile-mediated insect behavior are poorly understood. This study evaluates the impact of nitrogen application and bacterial blight Xanthomonas oryzae pv. oryzae (Xoo) on tri-trophic interactions involving rice plant, the brown planthopper Nilaparvata lugens, and its egg parasitoid Anagrus nilaparvatae on a temporal scale. Both N. lugens and A. nilaparvatae showed an obvious preference for Xoo-infected rice plants, but such preferences depended on nitrogen application. With prolonged Xoo infection and nitrogen fertilizer input, N. lugens and A. nilaparvatae preferred Xoo-infected plants. One possible mechanism was that the input nitrogen increased plant resistance to Xoo, which thus delayed the impact of Xoo infection on behavior of N. lugens and A. nilaparvatae. Further analyses indicated that the plant phytohormone JA regulated rice volatiles composition altering N. lugens preference, while SA regulated N. lugens-induced rice volatiles composition altering A. nilaparvatae preference. Moreover, with the development of the disease, Xoo infection had greater effects on plant volatiles and phytohormones than nitrogen fertilizer. Together, this finding provides new insights into how nitrogen application interacts with Xoo infection to modulate interactions among rice plants, N. lugens, and A. nilaparvatae.
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Link to article at publishers website
Database assignments for author(s): Man-Qun Wang

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Nilaparvata lugens	Rice (Oryza)
	Xanthomonas oryzae	Rice (Oryza)
Anagrus nilaparvatae (parasitoid)	Nilaparvata lugens