TY - JOUR
AU - Jaenike, John
AB -  Insects are by far the most diverse group of organisms on Earth; estimates of their current diversity range as high as 30 million species (58). A large fraction of these species feed on plants (154, 214), and Mitter et al (134) have shown that plant-feeding clades are consistently much more diverse than their nonphytophagous sister groups. By feeding at the base of the food chain, these insects have access to a potentially enormous supply of resources; these are extensively subdivided among species, as most phytophagous insects are highly host specific (55, 56, 133, 154). Investigations of the causes of host specialization in insects could therefore contribute substantially to our un­ derstanding of the origin and maintenance of diversity in this group. The evolution of plant-insect associations has been guided to a large extent by plant chemistry in some, but not all, insect groups (26, 55, 57, 153). For instance, related species of butterflies often use plants that are chemically similar, even if taxonomically distant (23, 57, 188, 190). Cladistic analyses of papilionid butterflies and Ophraella leaf beetles and their host plants have revealed that host shifts are most likely to occur among chemically similar plants, even though cladograms 
TI - Host Specialization in Phytophagous Insects
JF - Annual Review of Ecology, Evolution, and Systematics
DO - 10.1146/annurev.es.21.110190.001331
DA - 1990-11-01
UR - https://www.deepdyve.com/lp/annual-reviews/host-specialization-in-phytophagous-insects-VOIh8tCbxO
SP - 243
EP - 273
VL - 21
IS - 1
DP - DeepDyve
ER -