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Titolo:
ENTOMOPATHOGENIC NEMATODES FOR CONTROL OF CODLING MOTH, CYDIA-POMONELLA (LEPIDOPTERA, TORTRICIDAE) - EFFECT OF NEMATODE SPECIES, CONCENTRATION, TEMPERATURE, AND HUMIDITY
Autore:
LACEY LA; UNRUH TR;
Indirizzi:
ARS,YAKIMA AGR RES LAB,USDA,5230 KONNOWAC PASS RD WAPATO WA 98951
Titolo Testata:
Biological control (Print)
fascicolo: 3, volume: 13, anno: 1998,
pagine: 190 - 197
SICI:
1049-9644(1998)13:3<190:ENFCOC>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
STEINERNEMA-FELTIAE; SEX-PHEROMONE; HETERORHABDITIS; DESICCATION; SURVIVAL; REPRODUCTION; NEOAPLECTANA; CARPOCAPSAE; INFECTIVITY; TOLERANCE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
42
Recensione:
Indirizzi per estratti:
Citazione:
L.A. Lacey e T.R. Unruh, "ENTOMOPATHOGENIC NEMATODES FOR CONTROL OF CODLING MOTH, CYDIA-POMONELLA (LEPIDOPTERA, TORTRICIDAE) - EFFECT OF NEMATODE SPECIES, CONCENTRATION, TEMPERATURE, AND HUMIDITY", Biological control (Print), 13(3), 1998, pp. 190-197

Abstract

The susceptibility of codling moth diapausing larvae to three entomopathogenic nematode species was assessed in the laboratory using a bioassay system that employed cocooned larvae within cardboard strips. TheLC50 values for Steinernema carpocapsae, S. riobrave, and Heterorhabditis bacteriophora were 4.7, 4.8, and 6.0 infective juveniles/cm(2), respectively. When a discriminating concentration of 10 infective juveniles/ cm(2) of each of the three nematode species was evaluated at 15,20, 25, and 30 degrees C, S. carpocapsae was the most effective nematode with mortalities ranging from 66 to 90%. Mortalities produced by S. riobrave and H. bacteriophora at the four temperatures were 2-94 and25-69%, respectively. Studies were also conducted to test infectivityat 10, 35, and 40 degrees C. No mortality was produced by any of the nematode species at 10 degrees C. S. riobrave was the most infective nematode at 35 degrees C producing 68% mortality which was more than twice that observed for S. carpocapsae or H. bacteriophora. Codling mothlarvae treated with 10 infective juveniles/cm2 of S. carpocapsae and kept in 95+% RH at 25 degrees C for 0-24 h followed by incubation at 25-35% RH indicated that more than 3 h in high humidity was needed to attain 50% mortality. Trials of S. carpocapsae, S. riobrave, and H. bacteriophora at 50 infective juveniles/cm2 against cocooned larvae on pear and apple logs resulted in reductions of codling moth adult emergence of 83, 31, and 43%, respectively, relative to control emergence. Trials of the three entomopathogenic nematodes at 50 infective juveniles/cm2 against cocooned larvae in leaf litter resulted in 99 (S, carpocapsae), 80 (S. riobrave), and 83% (H. bacteriophora) mortality, respectively. Our results indicate good potential of entomopathogenic nematodes, especially S. carpocapsae, for codling moth control under a variety of environmental conditions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/09/20 alle ore 22:48:12