Title: Management of Asian citrus psyllid in California.
Abstract: Asian citrus psyllid (ACP), Diaphorina citri, was first detected in southern California (USA) in 2008 and the putative causal bacterium of huanglongbing (HLB), 'Candidatus Liberibacter asiaticus', was first found in a single residential tree in 2012. Studies of insecticide efficacy for ACP control indicate that many active ingredients are effective following direct contact with the insect. However, insecticides that leave persistent residues are needed to control nymphs as they emerge from eggs tucked within foliage and to protect trees from incursions of ACP adults. Residual control by foliar insecticides has proved longest for the pyrethroids and thiamethoxam and shortest for insecticides approved for organic production. These results, as well as observations of ACP population responses to insecticides applied to commercial orchards, have shaped ACP management strategies in various regions of California as described in this chapter. The goal for California ACP management is to reduce psyllids to extremely low densities and thus slow the spread of HLB, allowing time for the research community to develop better disease management tools and eventually a cure for the disease. The difficulties in achieving this goal are physical, sociological and economic and, as a result, grower participation varies around the state, but progress has been made in slowing the spread of the disease relative to other regions around the world. It remains to be seen whether this strategy will provide the desired result of maintaining the viability of the California citrus industry in the face of HLB.
Publication Year: 2020
Publication Date: 2020-01-01
Language: en
Type: book-chapter
Indexed In: ['crossref']
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Cited By Count: 5
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