TY - JOUR
T1 - Long-term virulence monitoring of differential cultivars in Japan's immigrant populations of Nilaparvata lugens (Hemiptera
T2 - Delphacidae) in 2001–2019
AU - Fujii, Tomohisa
AU - Yoshida, Kazuhiro
AU - Kobayashi, Tetsuya
AU - Myint, Khin Khin Marlar
AU - Yasui, Hideshi
AU - Sanada-Morimura, Sachiyo
AU - Matsumura, Masaya
N1 - Funding Information:
We thank R. Yamada, K. Abe, E. Kawano, I. Kawasaki, M. Tanaka and Y. Soshino for rearing the insects for experiments, and F. Sakamoto and H. Itoh for managing the paddy field at our institute. This work is supported by grants-in-aid for Scientific Research (C) (nos. 17580007, C20580007, C23580009), and Scientific Research (B) (no. 15H04438) to HY and MM, and Scientific Research (C) (no. C17K07687) to TK, MM and SS from the Japanese Society for the Promotion of Science.
Publisher Copyright:
© 2021, The Japanese Society of Applied Entomology and Zoology.
PY - 2021/8
Y1 - 2021/8
N2 - Resistant rice cultivars are an alternative of insecticide control for one of the major rice pests: the brown planthopper, Nilaparvatalugens (Hemiptera: Delphacidae). However, N.lugens has obtained virulence to resistant rice cultivars as same as insecticide resistance. The monitoring of virulence to differential cultivars is important for detections of the breakdown of resistance genes ‘BPH’ owned by the cultivars. We conducted long-term virulence monitoring (2001–2019) of differential cultivars in N. lugens immigrant populations in Japan. The virulence to the cultivars IR26 (BPH1), Mudgo (BPH1), and ASD7 (BPH2) was higher than that to other differential cultivars. The virulence to Babawee (BPH4) was lower than that to IR26, Mudgo, and ASD7, but it fluctuated over the immigrant years. The virulence to Kanto-PL7 (BPH3), Rathu Heenati (BPH3, BPH17) and Balamawee (BPH27, Three QTLs) was lower than that to other differential cultivars. The immigrant populations have therefore not developed virulence to three differential cultivars. These results suggest that N. lugens continued to develop virulence to differential cultivars that possess BPH1 and BPH2 after the breakdown. However, our results indicate that N.lugens could not break through the efficacy of differential cultivars possessing multiple BPH resistance genes.
AB - Resistant rice cultivars are an alternative of insecticide control for one of the major rice pests: the brown planthopper, Nilaparvatalugens (Hemiptera: Delphacidae). However, N.lugens has obtained virulence to resistant rice cultivars as same as insecticide resistance. The monitoring of virulence to differential cultivars is important for detections of the breakdown of resistance genes ‘BPH’ owned by the cultivars. We conducted long-term virulence monitoring (2001–2019) of differential cultivars in N. lugens immigrant populations in Japan. The virulence to the cultivars IR26 (BPH1), Mudgo (BPH1), and ASD7 (BPH2) was higher than that to other differential cultivars. The virulence to Babawee (BPH4) was lower than that to IR26, Mudgo, and ASD7, but it fluctuated over the immigrant years. The virulence to Kanto-PL7 (BPH3), Rathu Heenati (BPH3, BPH17) and Balamawee (BPH27, Three QTLs) was lower than that to other differential cultivars. The immigrant populations have therefore not developed virulence to three differential cultivars. These results suggest that N. lugens continued to develop virulence to differential cultivars that possess BPH1 and BPH2 after the breakdown. However, our results indicate that N.lugens could not break through the efficacy of differential cultivars possessing multiple BPH resistance genes.
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U2 - 10.1007/s13355-021-00749-3
DO - 10.1007/s13355-021-00749-3
M3 - Article
AN - SCOPUS:85107563294
VL - 56
SP - 407
EP - 418
JO - Applied Entomology and Zoology
JF - Applied Entomology and Zoology
SN - 0003-6862
IS - 3
ER -