Thiamethoxam and imidacloprid drench applications on sweet orange nursery trees disrupt the feeding and settling behaviour of Diaphorina citri (Hemiptera: Liviidae)

• DOI: 10.1002/ps.4213
• Publication Date: 2015-12-23T06:44:40Z
• Authors: Marcelo P Miranda; Pedro T Yamamoto; Rafael B Garcia; João PA Lopes; João RS Lopes
• Keywords: Diaphorina citri; Citrus × sinensis; Indoxacarb

Abstract BACKGROUND Chemical control is the method most used for management of Diaphorina citri , vector phloem‐limited bacteria associated with citrus huanglongbing ( HLB ) disease. The objectives this study were to determine influence soil‐drench applications neonicotinoids (thiamethoxam and imidacloprid) on probing behaviour D. nursery trees, using electrical penetration graph EPG technique, measure settling after trees that had received these neonicotinoid treatments. RESULTS drench disrupt probing, mainly variables related phloem sap ingestion, a significant reduction (≈90%) in duration activity compared untreated plants all assessment periods (15, 35 90 days application). Moreover, both insecticides have repellent effect resulting dispersal psyllids from treated plants. CONCLUSIONS This clearly demonstrates interference soil‐applied feeding during ingestion phase. These findings reinforce recommendation application before planting as useful strategy management. © 2015 Society Industry