Sammanfattning

Four barley varieties with no significant difference in aphid acceptance were sown in pure stands and in pairwise combinations with varieties side by side in separate rows. Settling tests were done in situ in the field plots with apterae of Rhopalosiphum padi (L.) (Homoptera:Aphididae) and showed that aphid acceptance was changed in some combinations of cultivars. In a laboratory test, in which plants of one cultivar were exposed to air from the other cultivars, aphid acceptance was significantly reduced in three of the four cultivars when treated with air from certain other cultivars. Two of these three cultivars showed the same reduction under field conditions. This supports the hypothesis that plant/plant communicationmay release responses in neighbouring plants that change aphid host plant acceptance. The results also show that this mechanism is not restricted to optimal growing conditions in the laboratory, although it may be modified under field conditions depending on plant genotype.

Nyckelord

allelopathy; aphids; mixing barley cultivars; plant/plant communication; Rhopalosiphum padi

Publicerad i

Entomologia Experimentalis et Applicata
2002, Volym: 102, nummer: 2, sidor: 177-182

SLU författare

• Ninkovic, Velemir

  • Institutionen för entomologi, Sveriges lantbruksuniversitet
    

• Olsson, Ulf

  • Institutionen för biometri och informatik, Sveriges lantbruksuniversitet
    

• Pettersson, Jan

  • Institutionen för entomologi, Sveriges lantbruksuniversitet
    

Associerade SLU-program

Framtidens lantbruk (tom Jan 2017)


UKÄ forskningsämne

Jordbruksvetenskap
Ekologi


Publikationens identifierare

DOI: https://doi.org/10.1046/j.1570-7458.2002.00937.x

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/74949