Lu, Y. 1989a The probability of interspecific competition between two citrus armoured scales: red scale and circular black scale.. Studies on the Integrated Management of citrus insect pests. Academic Book & Periodical Press Guangzhou, Guangdong, China

Notes: Abstract: Controlled experiments showed that when two scales, red scale, Aonidiella aurantii (Mask.) and circular black scale, Chrysomphalus aonidum (Homoptera: Diaspididae) occurred sympatrically on orange trees, their crawlers chose colonization sites and settling nymphs grew without interfering with each other; when mixed species were reared on lemon, the population growth of each of these two scale species were not affected by the presence of the ot