Cabbage plants contain large amounts of wax in the surface of the leaves. This wax makes it very difficult for pesticides to stay on the leaf surface. It is recommended to use spreader stickers to increase pesticide coverage and persistency. The majority of DBM caterpillars live under the leaf surface. For this reason, it is very important to have an excellent pesticide coverage under the leaves.
Hydraulic nozzles are the best to use with backpack or tractor sprayers.
The use of electrostatic sprayers improves pesticide coverage and reduces pesticide use. Andrews K. L. 1984. Zimbabwe Horticultural Crops Pest Management. You may also contact one of our collaborators in your geographic region who may have more specific technical information on the topic. If you have made an improvement or a new system to control this pest we will be happy to publish it here.