Association between Temperature and Reproductive Fitness of <i>Diaphorina citri</i> Infected with <i>Candidatus</i> Liberibacter Asiaticus
2022
Mubasher Hussain | Summyya Bano | Muhammad Qasim | Jing Gao | Steven P. Arthurs | Liande Wang | Dongliang Qiu | Runqian Mao
<i>Diaphorina citri</i> is a serious insect pest of citrus and an insect vector of <i>Candidatus</i> Liberibacter asiaticus (CLas) that causes Huanglongbing disease (citrus greening). In this study, we investigated the effect of the CLas pathogen on the life history parameters of <i>D. citri</i> at different temperature regimes. Our results demonstrated that the survival rate of first to fifth instar CLas-positive and CLas-negative <i>D. citri</i> fluctuate with the change in temperature over the range of 16–35 °C. Meanwhile, the mean developmental time (52.5 d) (d = day(s)) and adult longevity (5.2 d) of the CLas-positive psyllids was longer as compared to CLas-negative psyllids mean developmental time (32.81 d) and adult longevity (3.50 d) at the low- and high-temperature regimes (16 and 35 °C). However, at high temperature regimes, the significant effect of CLas-bacteria on <i>D. citri</i> fecundity was higher than the corresponding non-significant effect on their survivorship when compared to non-vectored psyllids. These results indicate a long-term, stable evolutionary relationship among vector-pathogen and climate change.
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