OLB is a sap-sucking insect that feeds on the underside of leaves. It is considered a low risk pest, but if ignored for a long periods of time, it can eventually reduce photosynthesis and cause defoliation. OLB creates tiny yellow dots on the front side of leaves. Infested leaves exhibit large yellow areas and will eventually drop as time progresses.
Infestations begin in springtime. It is easier and more cost effective to overcome infestations during the initial stage, such as in the nymphal stage. Make it a routine to monitor the field regularly and search plants for the above signs on younger foliage.
Maintain a healthy canopy and avoid long periods of time when trees are under stress due to lack water\proper irrigation or fertilization; healthier canopies are less likely to be attacked.
When drought conditions are present, adjust the size of canopy to with a water regime and prune the trees accordingly.
The following insecticides used in one or more parts of the world: dimethoate, dinotefuran, imidacloprid, and clothianidin.
Mineral oil can be applied.
*Names marked in red are considered to be highly poisonous to beneficial insects.
*Names marked in green are considered to be organic and IPM (integrated pest management) compatible.