Description: Scale pest vary dramatically. Some are very small organisms that grow beneath wax covers( some shaped like oyster shells others like mussels shells) to shiny pearl objects. Others look like creatures covered in mealy wax. Adult females are immobile and attached to plant. They secrete waxy coating for defense; this coating causes them to resemble reptilian scales or fish scales.
*They are the sucking insect pest
*Some problems caused by scale include leaf yellowing, needle stunting, branches die or fall off depending on populations.
*Symptoms caused by scale include curled leaves, yellow waxy bumps on leaves, poor growth, and white waxy spots on stems where scale deposit eggs.
*If untreated leaves will fall off prematurely, branches may die and fall off, black mold with grow on leaves attacked by scale, and the without treatment the whole plant will die.
*Cultural Control: -labor costs -provide plants with proper growing conditions, prune infested branches, open tree canopies to eliminate black scale.
*Biological control: the best control - $7.12 per 10sq meter - small parasitic wasps, beetles, bugs, ladybugs, and mites are predators of scale
*Chemical Control: $10.00 - bottle of fungicide and $22.59- bottle of Insecticide - Insecticides, horticulture oil ( in spring or summer) - inject the tree trunks with insecticide
*Mechanical Control: Labor cost- $1.79 scotch tape -put piece of tape on the branch above the scale inffestation -pick off each scale individually
*Isolation -Quarantine infested plants so more dont become infested