We evaluated the suppressive effect of prohydrojasmon (PDJ) on Frankliniella occidentalis and tom... more We evaluated the suppressive effect of prohydrojasmon (PDJ) on Frankliniella occidentalis and tomato spotted wilt virus (TSWV) in chrysanthemums under semi-commercial conditions. Overhead sprinkling of plants with PDJ did not suppress initial colonization by released adult thrips. However, it significantly reduced subsequent feeding damage on leaves and reproduction of larval offspring. Rates of 1 and 2 L/m2 0.8 mM PDJ equally suppressed F. occidentalis and feeding damage without phytotoxic effect on chrysanthemums, although 3 L/m2 reduced plant growth. The PDJ had a residual effect of at least 8 days. Weekly applications suppressed the occurrence of TSWV transmitted by viruliferous adults dispersed from infection-source plants to a degree consistent with that of feeding damage, so PDJ might inhibit primary infection via disruption of feeding behavior. All our findings suggest that PDJ may offer a powerful option for the control of F. occidentalis and Orthotospovirus diseases transm...
The effect of a thrips‐non‐transmissible Tomato spotted wilt virus (TSWV) on insect–host interact... more The effect of a thrips‐non‐transmissible Tomato spotted wilt virus (TSWV) on insect–host interactions between thrips and Arabidopsis thaliana was analysed. A wild‐type TSWV virulent isolate and a TSWV isolate that induces mild symptoms on inoculated plants (TSWV‐Mo) were used in this study, and TSWV‐Mo isolate was obtained by single local lesion isolation using Petunia x hybrid after several passages on Nicotiana rustica plants. In transmission test, although wild‐type TSWV (TSWV‐wt) was transmitted by two thrips species (transmission ratio; Frankliniella occidentalis, 25%; Thrips tabaci, 10%; and T. palmi, 0%), none of the thrips transmitted TSWV‐Mo. Feeding damage by F. occidentalis in A. thaliana plants was more extensive on TSWV‐wt‐infected plants than on TSWV‐Mo‐infected plants, despite comparable preference. Among the markers of plant defences, salicylic acid‐regulated genes were upregulated threefold to sixfold by TSWV‐wt or TSWV‐Mo infection. In contrast, jasmonate‐regulated genes and jasmonate/ethylene‐regulated genes were not affected by the infections. Pull assays showed that adjacent TSWV‐Mo‐infected plants were preferred over uninfected plants. In conclusion, our results showed that the transmissibility by thrips of TSWV is not related to preference of vector thrips and suggested that TSWV‐Mo‐infected plants may be used as attractants for behaviour control of thrips.
... Nature 194: 252-253. Manning, A. (1967) The control of sexual receptivity in female Drosophil... more ... Nature 194: 252-253. Manning, A. (1967) The control of sexual receptivity in female Drosophila. Animal Behaviour 15: 239-250. McLain, DK (1980) Sperm precedence and prolonged copulation in the southern green stink bug, Nezara viridula. ...
We evaluated the suppressive effect of prohydrojasmon (PDJ) on Frankliniella occidentalis and tom... more We evaluated the suppressive effect of prohydrojasmon (PDJ) on Frankliniella occidentalis and tomato spotted wilt virus (TSWV) in chrysanthemums under semi-commercial conditions. Overhead sprinkling of plants with PDJ did not suppress initial colonization by released adult thrips. However, it significantly reduced subsequent feeding damage on leaves and reproduction of larval offspring. Rates of 1 and 2 L/m2 0.8 mM PDJ equally suppressed F. occidentalis and feeding damage without phytotoxic effect on chrysanthemums, although 3 L/m2 reduced plant growth. The PDJ had a residual effect of at least 8 days. Weekly applications suppressed the occurrence of TSWV transmitted by viruliferous adults dispersed from infection-source plants to a degree consistent with that of feeding damage, so PDJ might inhibit primary infection via disruption of feeding behavior. All our findings suggest that PDJ may offer a powerful option for the control of F. occidentalis and Orthotospovirus diseases transm...
The effect of a thrips‐non‐transmissible Tomato spotted wilt virus (TSWV) on insect–host interact... more The effect of a thrips‐non‐transmissible Tomato spotted wilt virus (TSWV) on insect–host interactions between thrips and Arabidopsis thaliana was analysed. A wild‐type TSWV virulent isolate and a TSWV isolate that induces mild symptoms on inoculated plants (TSWV‐Mo) were used in this study, and TSWV‐Mo isolate was obtained by single local lesion isolation using Petunia x hybrid after several passages on Nicotiana rustica plants. In transmission test, although wild‐type TSWV (TSWV‐wt) was transmitted by two thrips species (transmission ratio; Frankliniella occidentalis, 25%; Thrips tabaci, 10%; and T. palmi, 0%), none of the thrips transmitted TSWV‐Mo. Feeding damage by F. occidentalis in A. thaliana plants was more extensive on TSWV‐wt‐infected plants than on TSWV‐Mo‐infected plants, despite comparable preference. Among the markers of plant defences, salicylic acid‐regulated genes were upregulated threefold to sixfold by TSWV‐wt or TSWV‐Mo infection. In contrast, jasmonate‐regulated genes and jasmonate/ethylene‐regulated genes were not affected by the infections. Pull assays showed that adjacent TSWV‐Mo‐infected plants were preferred over uninfected plants. In conclusion, our results showed that the transmissibility by thrips of TSWV is not related to preference of vector thrips and suggested that TSWV‐Mo‐infected plants may be used as attractants for behaviour control of thrips.
... Nature 194: 252-253. Manning, A. (1967) The control of sexual receptivity in female Drosophil... more ... Nature 194: 252-253. Manning, A. (1967) The control of sexual receptivity in female Drosophila. Animal Behaviour 15: 239-250. McLain, DK (1980) Sperm precedence and prolonged copulation in the southern green stink bug, Nezara viridula. ...
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