The barley thrips (Limothrips denticornis) – pest management

barley thrips pest management

The barley thrips, Limothrips denticornis are specific to rye cultures. It is widespread throughout Europe, Africa, and North America and it prefers gramineous plants.

Description. The adult has a body that is 1.3-1.6 mm long, colored in dark yellow-brown. The last abdominal segment is sharp. The ovipositor is short, consisting of two pairs of toothed valves.

Biology and ecology. The barley thrips produce 2 annual generations, the first developing on the pods of cereal leaves in autumn, and the second in the spikes of cereals, in spring.

Attacked plants and damages. It feeds on various cultivated grasses (wheat, barley, rye, etc.) and spontaneous plants as well. The attack is manifested at the spikes level, causing partial atrophies (terminal or basal), or total atrophies. At the stem level, the attack is manifested in the form of bends and twists, on the upper region of the last internode and the spike pod, leading to the apparition of white spots with reddish hues.

Control: The deep plowing at 20-25 cm ensures the destruction of 90% of the larvae that are hidden with the vegetal remains in the soil. Chemical treatments should be carried out with various approved products such as:

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The barley thrips (Limothrips denticornis) – pest management
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