California Pest Rating for English Ivy, Irish Ivy & Algerian Ivy | Hedera spp. Pest Rating: None PEST RATING PROFILE Initiating Event: This plant is subject to a petition to the Secretary to list English ivy (Hedera helix) as a noxious weed. History & Status: True ivies (Hedera spp.) are vining, evergreen plants with dark, … Continue reading English Ivy, Irish Ivy & Algerian Ivy | Hedera spp.
California Pest Rating for Pseudaulacaspis cockerelli (Cooley): Magnolia White Scale Hemiptera: Diaspididae Pest Rating: A PEST RATING PROFILE Initiating Event: Pseudaulacaspis cockerelli is frequently intercepted by CDFA and requires a pest rating proposal to support its pest rating. History & Status: Background: Pseudaulacaspis cockerelli is a highly polyphagous armored scale insect that is a pest of … Continue reading Pseudaulacaspis cockerelli (Cooley): Magnolia White Scale
Plant diseases can be caused by several pathogenic microorganisms including fungi, bacteria, viruses, viroids, phytoplasmas and plant parasitic nematodes. In California, several plant pathogens have evolved with native plants and consequently, caused little damage. However, many other pathogens are either not present or have only been newly discovered within the State. Without effective regulations in … Continue reading Plant Pathogens
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