Cowbugs

Triệu chứng

Corky calluses are formed on the stem due to the sap sucking of the bugs. Feeding marks can be seen on stems. The affected part dries up and defoliates if infestation is severe. The plant appears wilted and has reduced vigor. Foliar distortion can be noticed due to the sucking of cell sap and injection of toxins through saliva by the insects. In addition to this, sooty mould, Capnodium spp., develops on honey secreted by cow bugs on plant parts which results in the production of poor quality of leaves. The bugs usually sucks from the green stems. Heavy infestations can result in the formation of corky calluses, wilting and reduced plant vigor.