caa a22 4500 397572018 CHVBK 20180308164844.0 cr unu---uuuuu 161202e19960801xx s 000 0 eng 10.1093/ee/25.4.853 doi (NATIONALLICENCE)oxford-10.1093/ee/25.4.853 Intra- and Interspecific Predation Among Adult Female Phytoseiid Mites (Acari: Phytoseiidae): Effects on Survival and Reproduction [Elektronische Daten] [B. A. Croft, M. B. Croft] We tested whether the oligophagous phytoseiid mites Metaseiulus occidentalis (Nesbitt) and Neoseiulus fallacis (Garman) differed in predation, survival, and reproduction from the polyphagous mites Typhlodromus pyri Scheuten and Amblyseius andersoni Chant when cohorts of adult females (no immatures) of each were held without food at a ratio of 40:0 or in all combinations at 20:20 or 10:10:10:10. When alone, mean survival was 5-10 d: T. pyri > A. andersoni > M. occidentalis > N. fallacis. Of the 4, only M. occidentalis did not feed interspecifically on live adult females, all 4 scavenged dead mites. At 20:20, A. andersoni killed T. pyri least rapidly, M. occidentalis most rapidly. Both T. pyri or N. fallacis killed a few M. occidentalis. A. andersoni survived longer with either M. occidentalis or N. fallacis than with T. pyri. A. andersoni adult females when held with 20 M. occidentalis adult females (replaced daily) produced 33-50% fewer progeny than with twospotted spider mite, Tetranychus urticae Koch, adult females; this was much more than with T. pyri or N. fallacis adult females. Neither T. pyri nor N. fallacis adult females produced new adults when held with M. occidentalis adult females. It is clear that some adult female phytoseiids can feed on others and add to their survival and reproduction. No clear patterns were seen in the predation responses of oligophagous versus polyphagous species. © 1996 Entomological Society of America Biological Control nationallicence Typhlodromus pyri nationallicence Metaseiulus occidentalis nationallicence Neoseiulus fallacis nationallicence Amblyseius andersoni nationallicence competition nationallicence predator complex nationallicence Croft B. A. Department of Entomology, Oregon State University, Corvallis, OR 97331-2907 aut Croft M. B. Department of Entomology, Oregon State University, Corvallis, OR 97331-2907 aut Environmental Entomology Oxford University Press 25/4(1996-08-01), 853-858 0046-225X 25:4<853 1996 25 ee https://doi.org/10.1093/ee/25.4.853 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.4.853 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Croft B. A. Department of Entomology, Oregon State University, Corvallis, OR 97331-2907 aut NATIONALLICENCE 700 1- Croft M. B. Department of Entomology, Oregon State University, Corvallis, OR 97331-2907 aut NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/4(1996-08-01), 853-858 0046-225X 25:4<853 1996 25 ee Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford