caa a22 4500 388092858 CHVBK 20180307125256.0 cr unu---uuuuu 161130e199908 xx s 000 0 eng 10.4039/Ent131475-4 doi S0008347X00010099 pii (NATIONALLICENCE)cambridge-10.4039/Ent131475-4 OVIPOSITION AND LARVAL ESTABLISHMENT OF SITODIPLOSIS MOSELLANA (DIPTERA: CECIDOMYIIDAE) ON WHEAT (GRAMINEAE) AT DIFFERENT GROWTH STAGES [Elektronische Daten] The wheat midge, Sitodiplosis mosellana (Géhin), infests wheat, Triticum aestivum L., heads only up to anthesis when pollination occurs. The termination of infestation might be due to a deterrence of oviposition or to a suppression of larval growth on developing seeds. These hypotheses were tested in the laboratory by measuring oviposition preference, larval development, and larval preference for plants at different growth stages. Females showed no preference for ovipositing on heads at any stage from the onset of heading up to and including anthesis, and continued to lay eggs at a reduced rate 10 days after anthesis. Survival of newly hatched larvae was reduced on seeds 3-1 days after anthesis and survival and development was greatly reduced on seeds 5 or 6 days after anthesis. Larvae moved away from older seeds and fed on younger seeds in a choice test. Given a hatching time of 5-6 days, a failure to infest wheat after anthesis is not due to oviposition deterrence at anthesis, but to suppression of larval growth and development which begins soon after anthesis. Copyright © Entomological Society of Canada 1999 Ding H. Cereal Research Centre, Agriculture and Agri-Food Canada, 195 Dafoe Road, Winnipeg, Manitoba, Canada R3T 2M9 Lamb R.J. Cereal Research Centre, Agriculture and Agri-Food Canada, 195 Dafoe Road, Winnipeg, Manitoba, Canada R3T 2M9 The Canadian Entomologist Cambridge University Press 131/4(1999-08), 475-481 0008-347X 131:4<475 1999 131 TCE https://doi.org/10.4039/Ent131475-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.4039/Ent131475-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ding H. Cereal Research Centre, Agriculture and Agri-Food Canada, 195 Dafoe Road, Winnipeg, Manitoba, Canada R3T 2M9 NATIONALLICENCE 700 1- Lamb R.J. Cereal Research Centre, Agriculture and Agri-Food Canada, 195 Dafoe Road, Winnipeg, Manitoba, Canada R3T 2M9 NATIONALLICENCE 773 0- The Canadian Entomologist Cambridge University Press 131/4(1999-08), 475-481 0008-347X 131:4<475 1999 131 TCE CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge