Mealybugs and scales
). They suck the sap of plants and are mostly host plant specific. Apart from the damage they cause by sucking plant sap, mealybugs and soft scales also [...] on the aerial parts of the plant, some species extract their nourishment from roots, whilst others are gall-formers. A few species can also transmit harmful [...] inflict damage on the crop in various ways: nymphs and females extract the sap from the plant, stunting growth and causing deformation and/or yellowing of leaves