Using onion conditioned by Delia (=Hylemya) antiqua larvae for four different periods of time and larvae of four different ages, the effect of conditioned or fresh onion on larval preference was studied. It was shown that of the sixteen combinations tested, nine larval groups showed a preference for conditioned onion, five showed no preference and two showed a preference for fresh onion. Significantly, it was the older larvae which preferred the fresh onion. Further, it was demonstrated that the inoculation of a larval macerate to fresh onion prior to the addition of 1st-instar larvae significantly reduced larval developmental time. Using these data and also information from the literature a scenario was constructed of the interaction of larval preference and onion damage in the field.
Onion conditioning pertaining to larval preference, survival and rate of development in Delia (=Hylemya) antiqua Meigen
ZURLINI, Giovanni;
1978-01-01
Abstract
Using onion conditioned by Delia (=Hylemya) antiqua larvae for four different periods of time and larvae of four different ages, the effect of conditioned or fresh onion on larval preference was studied. It was shown that of the sixteen combinations tested, nine larval groups showed a preference for conditioned onion, five showed no preference and two showed a preference for fresh onion. Significantly, it was the older larvae which preferred the fresh onion. Further, it was demonstrated that the inoculation of a larval macerate to fresh onion prior to the addition of 1st-instar larvae significantly reduced larval developmental time. Using these data and also information from the literature a scenario was constructed of the interaction of larval preference and onion damage in the field.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
