Huanglongbing symptoms of the inoculated plants.

Abstract

<p>Healthy grapefruit rootstocks graft-inoculated with HLB-affected lemon scions treated with ampicillin at a concentration of 1.0 g/L (<b>Amp</b>), gentamicin at a concentration of 100 mg/L (<b>Gm</b>), and a water control (disease control, <b>CK₁</b>); The healthy plants were graft-inoculated with Las-free lemon scions (healthy control, <b>CK₂</b>).</p