The caterpillars are also the larvae of various night butterflies from the large family of owls (Noctuidae). The species found in viticulture eat among other things on Rebstock, The four to six centimeters long tracked (they are meaty and thicker than that of the Rhombenspanners ) of reddish brown to brown-black color hibernate in the ground. At the beginning of the bud swelling, they migrate to the bud and eat it at night. In contrast to other caterpillars, the buds are so deeply eaten that they are completely destroyed. During the day, they hide on the ground near the trunk. After a few days, they withdraw into the ground to pupate, but new generations are constantly emerging from it. It will also be the leaves infested, which are eaten from the edge.
The moths are by means of pheromone traps monitored and the necessary measures derived from them. The caterpillars are made by special pesticides (Molluscicides) or also or by means of the soil bacteria Bacillus thuringiensis fought. A simple method is to leave weeds in the vineyard, as caterpillars eat them first before climbing onto the vines. Excellent results have been obtained from keeping chickens in vineyards, which provide effective reduction. As part of the Biological crop protection will too nematodes (Roundworms) used. Natural enemies are caterpillar flies, earwigs and brack wasps, See a list of all pests below Vine enemies,