caa a22 4500 39757231X CHVBK 20180308164845.0 cr unu---uuuuu 161202e19960601xx s 000 0 eng 10.1093/ee/25.3.688 doi (NATIONALLICENCE)oxford-10.1093/ee/25.3.688 Melon Aphid (Homoptera: Aphididae) Control by Inundative Convergent Lady Beetle (Coleoptera: Coccinellidae) Release on Chrysanthemum [Elektronische Daten] [Steve H. Dreistadt, Mary Louise Flint] Convergent lady beetles, Hippodamia convergens Guérin-Méneville, collected from aggregations in California were released for control of melon aphids, Aphis gossypii Clover, infesting potted chrysanthemum, Dendranthema grandiflora (Tzvelev) ‘Hurricane', outdoors. Most beetles dispersed from plants within 1-3 d after a single release during May 1993 and July and September 1993 and 1994. Most dispersing beetles left the study area, although some moved within release plots to adjoining plants or dispersed to nearby plots within ≈40 m. Aggregation-collected beetles that were allowed to drink and fly in a screen tent for 7-10 d before release and insectary-reared beetles dispersed more slowly than aggregation-collected beetles that were stored at 4-10°C until the day of release. Although beetles dispersed within days, releases significantly reduced aphid densities during all trials. A single release of 34-42 adult H. convergens per pot provided 25-84% aphid control, calculated according to the Abbott method. Each beetle consumed ≈25-170 melon aphids per day. There was a density-dependent functional response in predation; beetles consumed more aphids when released on plants with higher aphid densities. Release of commercially available convergent lady beetles can provide augmentative control of relatively high aphid densities on small potted plants. © 1996 Entomological Society of America Biological Control nationallicence Hippodamia convergens nationallicence Aphis gossypii nationallicence Dendranthema grandiflora nationallicence inundative control nationallicence Dreistadt Steve H. IPM Education and Publications, State wide IPM Project, University of California, Davis, CA 95616-8620 aut Flint Mary Louise IPM Education and Publications, State wide IPM Project, University of California, Davis, CA 95616-8620 aut Environmental Entomology Oxford University Press 25/3(1996-06-01), 688-697 0046-225X 25:3<688 1996 25 ee https://doi.org/10.1093/ee/25.3.688 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.3.688 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dreistadt Steve H. IPM Education and Publications, State wide IPM Project, University of California, Davis, CA 95616-8620 aut NATIONALLICENCE 700 1- Flint Mary Louise IPM Education and Publications, State wide IPM Project, University of California, Davis, CA 95616-8620 aut NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/3(1996-06-01), 688-697 0046-225X 25:3<688 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