What does cooling weather do to citrus leafminer?

The nights are finally cooling down and this in combination with shortening daylength, signals pests to slow down their development and in some cases go into diapause.  Citrus leafminer will stop development soon and just sit in leaves in various stages through the winter.  The youngest larval instars will die due to the cold.  The older larval instars and pupae will become prey to predators and parasites.  The leafminer population will survive primarily as a few pupae and adults, which is why it will start out in very low numbers in the spring.

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