Idaea inquinata develops on dried plants with a preference for medicinal plants. The survival of second and fourth instars larvae of I. inquinata exposed to 6 and -18±1 °C, for different periods of time, was observed. Groups of 20 larvae were placed at 6±1 °C 60±5% R.H. for periods of 15, 18, 20 and 25 days and then put in thermostatic chamber at 26±1 °C, 70±5% R.H. Tests were controlled after 1, 2, 3, 8, 15 and 23 days until adults emergence. The same procedure was used for tests at -18 °C with exposure times of 4, 8 and 24 hours. For all the tested periods at 6±1 °C, a mortality higher than 95% was observed in second instar larvae after 1 day at 26 °C. A 100% mortality was observed on the second day at 26°C after treatment at 6 °C for 18, 20, 25, on the third day for 15 days treatment. Few fourth instar larvae, placed for 25 days at 6 °C, were alive after 8 days at 26 °C, but they didn’t emerge as adult; when exposed for 15, 18 and 20 days few individuals developed to adult. Larvae of I. inquinata were susceptible to the treatment at -18 °C. A 100% mortality was observed after 24 hours, when second and fourth instar larvae were treated for 4 hours at -18 °C.
Effects of temporary cooling on larvae of Idaea inquinata (Scopoli) (Lepidoptera Geometridae) / L. Limonta, D.P. Locatelli. - In: IOBC/WPRS BULLETIN. - ISSN 1027-3115. - 81:(2012), pp. 215-219. (Intervento presentato al convegno Integrated Protection of Stored Products tenutosi a Volos, Greece nel 2011).
Effects of temporary cooling on larvae of Idaea inquinata (Scopoli) (Lepidoptera Geometridae)
L. LimontaPrimo
;D.P. LocatelliUltimo
2012
Abstract
Idaea inquinata develops on dried plants with a preference for medicinal plants. The survival of second and fourth instars larvae of I. inquinata exposed to 6 and -18±1 °C, for different periods of time, was observed. Groups of 20 larvae were placed at 6±1 °C 60±5% R.H. for periods of 15, 18, 20 and 25 days and then put in thermostatic chamber at 26±1 °C, 70±5% R.H. Tests were controlled after 1, 2, 3, 8, 15 and 23 days until adults emergence. The same procedure was used for tests at -18 °C with exposure times of 4, 8 and 24 hours. For all the tested periods at 6±1 °C, a mortality higher than 95% was observed in second instar larvae after 1 day at 26 °C. A 100% mortality was observed on the second day at 26°C after treatment at 6 °C for 18, 20, 25, on the third day for 15 days treatment. Few fourth instar larvae, placed for 25 days at 6 °C, were alive after 8 days at 26 °C, but they didn’t emerge as adult; when exposed for 15, 18 and 20 days few individuals developed to adult. Larvae of I. inquinata were susceptible to the treatment at -18 °C. A 100% mortality was observed after 24 hours, when second and fourth instar larvae were treated for 4 hours at -18 °C.File | Dimensione | Formato | |
---|---|---|---|
IOBC 2012 Idaea.pdf
accesso aperto
Tipologia:
Publisher's version/PDF
Dimensione
65.15 kB
Formato
Adobe PDF
|
65.15 kB | Adobe PDF | Visualizza/Apri |
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.