The cochineal looks like thin whitish lamellae or shields that smear especially old branches and little exposed trunks of climbing plants. They can lead to even sensitive weakening of the plant. They have a body protected by a waxy patina for which treatment with products that act by contact becomes difficult.
Curative actions : the best time to intervene preventively is during the winter months, by distributing white oil, so in the absence of vegetation there is no damage to the plant (it is phytotoxic) and the parts without vegetation are better sprayed. Currently there are also summer oils, which do not damage the vegetation often associated with Imidacloprid, which has a systemic action.