University of Maryland Extension

larvae

Early Season Insect Management: Flea Beetles

Timely Viticulture: Pre Bloom
Identification and Biology Grape Flea beetles, Altica spp. (Coleoptera: Chrysomelidae), are small (4-5 mm), oval shaped, metallic blue-purple beetles that jump when disturbed. Grape flea beetles overwinter as adults and become active on warm April days when grape buds begin to swell. Adult beetles...

The Spotted Wing Drosophila (SWD) - Part 2: Management

Timely Viticulture: Pre Harvest
The Spotted Wing Drosophila (SWD) is a small vinegar fly with the potential to damage many fruit crops, particularly thin-skinned fruit. SWD was first detected in the western United States in 2008 and has already become a major pest of many fruit and berry crops in Maryland, with potential to cause...

The Spotted Wing Drosophila (SWD) - Part 1: History, Background, and Damage

Timely Viticulture: Pre Harvest
History The Spotted Wing Drosophila (SWD) is a small vinegar fly with the potential to damage many fruit crops, especially thin-skinned fruit. SWD, or Drosophila suzukii, is native to eastern Asia. Most species of vinegar flies attack overripe or damaged fruit. However, SWD is unique as the female...
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