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Control citrus pests all season long

June 8, 2016

CALIFORNIA: As the threat of spider mites in citrus crops begin to wane in June, the threats of the Asian citrus psyllid (ACP) and citrus leafminer are still very prevalent.

In the San Joaquin Valley, California, the citrus leafminer typically starts to become active in early-June. It infests leaves and succulent shoots, often leaving young leaves damaged. To help growers identify the citrus leafminer, University of California, Davis outlines identification tips:

  • Pale or dark (excrement-filled) winding tunnels under the leaf surface
  • Distorted, galled, or rolled young leaves

ACP is a season-long, aphid-like insect that sucks phloem, distorting leaves and shoots while simultaneously spreading Huanglongbing, also known as citrus greening. Citrus greening attacks the tree’s vascular system and leads to decline in tree health and fruit production. Ultimately, it will kill the tree. As citrus greening continues its spread across California, it’s important to understand the danger ACP poses as a vector of this disease.

It’s also important to follow proper techniques and application timings in efforts to manage ACP. Syngenta recommends the following:

  • Make ACP applications at beginning of new growth flushes
  • Use products or combinations of products (tank-mixes/pre-mixes) that also address other insect pests that may be present at time of application
  • Utilize an insecticide such as Agri-Flex® insecticide, a pre-mix containing abamectin and thiamethoxam, that has activity against ACP and other pests

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