Red sawfly

Systematic position: Dolerus haematodes belongs to the order Hymenoptera, family Tenthredinidae. This species is recognized as a specific insect pest of cereal crops, commonly found across temperate regions and capable of causing economic losses in agricultural production.

Host crops: This pest primarily targets small grain cereals. Winter wheat and rye are the most common hosts, although the larvae can occasionally be found on other cultivated cereals and wild grasses that act as alternative food sources during the early spring season.

Biology and life cycle: The adult sawflies emerge in early spring, synchronized with the active growth phase of winter cereals. Eggs are deposited within the plant tissues. Upon hatching, the larvae, which resemble caterpillars, feed aggressively on foliage. After completing their larval development, they burrow into the soil to form cocoons, where they overwinter until the next season.

Damage and economic impact: The larvae feed on the leaf blades, creating ragged holes or feeding along the margins. High infestation densities can cause significant defoliation. This loss of photosynthetic area restricts the plant's ability to fill grain heads properly, leading to reduced yields and lower grain quality, especially if the infestation coincides with drought stress.

Protection measures: Integrated pest management strategies are crucial for controlling Dolerus haematodes:

• Implementing crop rotation to break the pest's lifecycle.
• Deep plowing in autumn to disrupt the pupation sites in the soil.
• Scouting for larvae during the stem elongation stage of cereals.
• Applying registered insecticides when population thresholds exceed economic levels.