caa a22 4500 386360995 CHVBK 20180307111915.0 cr unu---uuuuu 161130e198901 xx s 000 0 eng 10.4039/Ent12147-1 doi S0008347X00028480 pii (NATIONALLICENCE)cambridge-10.4039/Ent12147-1 RESISTANCE TO PYRAZOPHOS IN THE SERPENTINE LEAFMINER LIRIOMYZA TRIFOLII (BURGESS) (DIPTERA: AGROMYZIDAE) IN ONTARIO GREENHOUSES [Elektronische Daten] In 1986 a greenhouse population of Liriomyza trifolii (Burgess) was shown to be highly resistant (155-fold at LC50) to the organophosphorus compound pyrazophos. However in 1987, the same population had only 35-40% resistant individuals remaining. A survey in 1986 of five other greenhouses reporting leafminer control failures indicated three other resistant populations in southern Ontario. Resistance was not affected by the addition of the synergists diethyl maleate or triphenyl phosphate to pyrazophos. Cross-resistance to the phosphorothioate insecticides demeton, chlorpyrifos, and triazophos was indicated. Copyright © Entomological Society of Canada 1989 Broadbent A.B. Agriculture Canada Research Station, Vieland Station, Ontario, Canada L0R 2E0 Pree D.J. Agriculture Canada Research Station, Vieland Station, Ontario, Canada L0R 2E0 The Canadian Entomologist Cambridge University Press 121/1(1989-01), 47-53 0008-347X 121:1<47 1989 121 TCE https://doi.org/10.4039/Ent12147-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.4039/Ent12147-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Broadbent A.B. Agriculture Canada Research Station, Vieland Station, Ontario, Canada L0R 2E0 NATIONALLICENCE 700 1- Pree D.J. Agriculture Canada Research Station, Vieland Station, Ontario, Canada L0R 2E0 NATIONALLICENCE 773 0- The Canadian Entomologist Cambridge University Press 121/1(1989-01), 47-53 0008-347X 121:1<47 1989 121 TCE CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge