The winter rapeseed crops in Poland have suffered from the significant spread of cruciferous fleas.

Many rapeseed crops in Poland have been affected by a significant number of cruciferous fleas. The cabbage fly also poses a threat to the crop, writes Farmer.pl. It is noted that at the early stages of rapeseed development, the flea can cause significant damage to the plants. It does not just eat holes in the leaves—in smaller plants, the leaves are sometimes completely destroyed. In some places, the damage is so severe that the leaves, deprived of their assimilation surface, die. Visually, the impact of the pests is easiest to notice on the leaves. However, one should not forget about the flea larvae, which settle in the plant and burrow tunnels inside—in the petioles, leaf veins, and in the shoots. As for the cabbage fly, it develops three to four generations. The warmer the weather, the higher the likelihood of a fourth generation. In the context of rapeseed, the larvae of the third or fourth generation pose the greatest threat. The flies that are currently appearing on ...