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Phytopathogenic infection alters rice–pest–parasitoid tri‐trophic interactions
Author(s) -
Sun Ze,
Shi JinHua,
Liu Hao,
Yin LeTong,
Abdelnabby Hazem,
Wang ManQun
Publication year - 2021
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.6491
Subject(s) - biology , pest analysis , parasitoid , rhizoctonia solani , trophic level , herbivore , salicylic acid , integrated pest management , biological pest control , brown planthopper , host (biology) , oryza sativa , botany , agronomy , horticulture , ecology , biochemistry , gene , genetics
BACKGROUND Plant pathogens and pests often occur together, causing damage while interfering with plant growth. The effects of phytopathogenic infections on plant–herbivore–natural enemy tri‐trophic interactions (TTIs) have been extensively investigated, but little is known about how the interval of infection influences such relationships. Here, the effect of rice plants infected by the phytopathogen Rhizoctonia solani on the herbivorous rice brown planthopper (BPH) and associated egg parasitoid Anagrus nilaparvatae over a temporal scale was examined. RESULTS Our results showed that rice plants infected by R. solani showed increased volatile profiles and significantly attracted BPH and A. nilaparvatae at 5–15 days post infection (DPI) and 5–10 DPI, respectively, when compared with healthy plants. Jasmonic acid and salicylic acid content decreased significantly in BPH‐damaged plants after 15 DPI, whereas oxalic acid accumulated soon after 5 DPI when compared with healthy plants. To adapt to adverse environment, BPH laid more eggs and developed into macropterous adults. Under field conditions, R. solani infection had no substantial effect on the arthropod community when compared with healthy plants. CONCLUSION Taken together, R. solani infection altered rice–pest–parasitoid TTIs over a temporal scale. This result will shed more light on our understanding of plant pathogen–insect cross‐talk essential for developing novel pest management strategies. © 2021 Society of Chemical Industry.