Dolycoris penicillatus

Dolycoris penicillatus is a member of the Hemiptera order and the Pentatomidae family. Commonly known as a type of shield bug or stink bug, this species is a significant pest in agricultural ecosystems, recognized for its hairy body and distinctively pointed shoulders which differentiate it from similar species in the region.

This pest infests a wide range of agricultural commodities. Its primary targets include cereal crops like wheat and barley, leguminous crops such as peas and beans, and various horticultural crops including tomatoes and eggplants. The bug causes damage throughout its nymph and adult stages by piercing plant tissues with its specialized mouthparts.

The life cycle of Dolycoris penicillatus follows a hemimetabolous development process: egg, five nymphal instars, and the adult stage. The insect overwinters as an adult, typically seeking shelter under debris, leaf litter, or in field margins. As temperatures rise in spring, the adults migrate to crops, where they begin mating and oviposition on the foliage.

The damage caused by this pest is primarily physiological. By injecting saliva into the plant, the insect disrupts cellular function, leading to shriveled grains, necrotic spots on leaves and fruit, and stunted plant development. In cereal crops, this leads to significant weight loss in kernels and poor technological properties, often rendering the harvest unsuitable for milling.

Effective management strategies for controlling Dolycoris penicillatus include several integrated pest management practices:

• Regular field monitoring during the critical stages of grain development.
• Application of selective insecticides when population levels exceed the economic threshold.
• Cultural control, such as eliminating wild hosts and weeds surrounding crop fields.
• Post-harvest soil cultivation to disrupt the overwintering sites of the bugs.