The Asian citrus psyllid, Diaphorina citri Kuwayama, is the insect vector of the pathogen causing huanglongbing. We selected three botanical oils to evaluate behavioral activity against D. citri. In laboratory olfactometer assays, fir oil was repellent to D. citri females, while litsea and citronella oils elicited no response from D. citri females. In choice settling experiments, D. citri settl...

wayama (Hemiptera: Liviidae), has emerged as the most important exotic insect pest of citrus in California. Damage is two-fold. First, psyllids cause direct injury to citrus through feeding on phloem juice in immature foliage, deforming the leaves (Halbert and Manjunath 2004); and second, and more importantly, they vector the bacterium Candidatus Liberibacter asiaticus (CLas), which causes the ...

BACKGROUND Chemical control is the method most used for management of Diaphorina citri, the vector of the phloem-limited bacteria associated with citrus huanglongbing (HLB) disease. The objectives of this study were to determine the influence of soil-drench applications of neonicotinoids (thiamethoxam and imidacloprid) on the probing behaviour of D. citri on citrus nursery trees, using the elec...

Abstract Background The Asian citrus psyllid, Diaphorina citri Kuwayama (Hemiptera: Liviidae) is an insect pest species responsible for damages of fruit quality and tree health. This a vector bacteria ‘ Candidatus Liberibacter’ spp . putative causal agent greening disease known as Huanglongbing (HLB), considered one the most destructive diseases orchards worldwide. Disease management mainly bas...

Diaphorencyrtus aligarhensis (Hymenoptera: Encyrtidae) was first released in California for biological control of Diaphorina citri (Hemiptera: Liviidae) December 2014. The establishment and parasitism rates D. aligarhensis, along with those another introduced species, Tamarixia radiata Eulophidae), 2011, were assessed at 15 release 24 no-release sites over the period 2016–2018. Study citrus tre...

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The Asian citrus psyllid, Diaphorina citri Kuwayama (Hemiptera: Liviidae), is a primary pest of citrus due to its status as a vector of the citrus disease, huanglongbing. We evaluated the effects of light of specific wavelength and polarization on phototactic behavior of D. citri using a horizontal bioassay arena. Wavelength-associated positive phototaxis was associated with short wavelength UV...