Biological-control-subject
Guides
Aleurocanthus woglumi
Citrus blackfly
Aleurocanthus woglumi is a whitefly species in the family Aleyrodidae, native to India and widely distributed across tropical and subtropical regions. It is a significant agricultural pest of citrus and over 300 other host plants, causing damage through sap feeding and honeydew excretion that promotes sooty mold growth. The species has been introduced to the Americas, Africa, and Pacific islands, where biological control using parasitic wasps has been implemented.
Coleophora laricella
Larch Casebearer Moth, Western Larch Case-bearer
Coleophora laricella is a case-bearing moth native to Central and Northern Europe, where it feeds on European larch (Larix decidua). Introduced to North America in the mid-19th century, it has become a significant invasive pest of Larix species, particularly western larch (L. occidentalis) and tamarack (L. laricina). The species produces one generation annually, with larvae that mine inside larch needles and construct portable cases from hollowed-out foliage. Severe infestations can reduce annual tree growth by 97% after five years, causing substantial economic losses and increasing host susceptibility to secondary pests and diseases.
Monellia
Blackmargined aphid, Yellow pecan aphid
Monellia is a genus of aphids in the family Aphididae, native to North America. The genus includes notable pecan pest species, particularly Monellia caryella (blackmargined aphid) and Monellia costalis (yellow pecan aphid). These aphids feed on phloem sap from pecan and hickory trees, causing direct damage through sap removal and indirect damage via honeydew production that supports sooty mold growth. The genus is subject to significant biological control pressure from diverse natural enemy communities including lacewings, lady beetles, parasitoid wasps, and entomopathogenic fungi.
Phytomyza ilicis
holly leaf miner, European Holly Leafminer
Phytomyza ilicis is a small agromyzid fly whose larvae create distinctive pale leaf mines in European holly (Ilex aquifolium). Native to Europe, it has been introduced to western North America where it became a significant pest of ornamental holly. The species is univoltine, with highly synchronized phenology: adults emerge in late spring to oviposit into the soft tissue of newly expanding leaves, and larvae feed internally until completing development the following spring. It has been extensively studied as a model system for understanding population regulation, density dependence, and multi-trophic interactions including parasitism and predation.