אסיף מאגר המחקר החקלאי

Behavioural response of the fruit tree bark beetle, Scolytus mediterraneus, to host and non-host plants

Year:

1972

Source of publication :

Authors :

Volume :

15

Co-Authors:

Gurevitz, E., Division of Entomology, Volcani Institute of Agricultural Research, Bet Dagan, Israel
Ishaaya, I., Division of Entomology, Volcani Institute of Agricultural Research, Bet Dagan, Israel

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Abstract:

The response of beetles to various host extracts obtained by different solvents of a wide range of polarity have been examined by a bioassay method. Ether as a low-polar solvent was more effective than ethanol. The effectiveness of the ethanol decreases with an increase in its polarity. Extracts from infested hosts elicited a greater response than those from uninfested hosts. This has been demonstrated by ether and ethanol extracts, with plum and apricot hosts. Ether extract from an infested host was about four times more active than that from an uninfested host. These results were in accordance with those obtained in situ in which beetles were attracted to infested twigs more strongly than to uninfested twigs. An extract from a non-host plant (orange) was ineffective and its response value resembled that of untreated control. There is a strong indication that after an initial attack, beetle secretions together with plant material are responsible for a mass attraction of the beetles in the field. © 1972 Kluwer Academic Publishers.

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