Helen E. Roy

Field Guide to the Ladybirds of Great Britain and Ireland

2019

Field Guide to the Ladybirds o

Field Guide to the Ladybirds of Britain and Ireland

2018

Natural History of Ladybird Be

Natural History of Ladybird Beetles

2016

Field Guide to Invasive Plants

Field Guide to Invasive Plants and Animals in Britain

2015

Invasive Plants and Animals of Britain Helm Field Guides

2014

The Ecology of Fungal Entomopathogens

2014

Invasive Alien Arthropod Predators and Parasitoids

2013

Invasive Alien Arthropod Predators And Parasitoids An Ecological Approach

2011

The ladybirds (Coccinellidae) of Britain and Ireland

2011

From biological control to invasion

2010

Guide to Ladybirds of the Brit

Guide to Ladybirds of the British Isles

2006