2 research outputs found
Field evaluation of biocontrol agents against black-foot and Petri diseases of grapevine
[Background] Blackâfoot and Petri diseases are the main fungal diseases associated with young grapevine decline. Two field experiments were established to evaluate the preventive effect of two potential biocontrol agents (BCAs), that is Streptomyces sp. E1â+âR4 and Pythium oligandrum Po37, and three BCAâcommercial products containing Trichoderma atroviride SC1, Trichoderma koningii TK7 and Pseudomonas fluorescensâ+âBacillus atrophaeus on fungal infection in grafted plants and plant growth parameters.
[Results] The effectiveness of some BCA in reducing the incidence and severity of both diseases was dependent on the plant part analyzed and the plant age. No single BCA application was able to control both diseases. Streptomyces sp. E1â+âR4 were able to reduce significantly the infection of the most prevalent blackâfoot disease fungi while P. oligandrum Po37 and Trichoderma spp. were able to reduce significantly Phaeomoniella chlamydospora and Phaeoacremonium minimum (Petri disease) infection. BCA treatments had no effect on the shoot weight, and root weight was significantly lower in all BCA treatments with respect to the control.
[Conclusions] The combination of the diseaseâsuppressive activity of two or more beneficial microbes in a biocontrol preparation is required to prevent infection by blackâfoot and Petri disease fungi in vineyards.Peer reviewe
Field evaluation of biocontrol agents against blackâfoot and Petri diseases of grapevine
[Background] Blackâfoot and Petri diseases are the main fungal diseases associated with young grapevine decline. Two field experiments were established to evaluate the preventive effect of two potential biocontrol agents (BCAs), that is Streptomyces sp. E1â+âR4 and Pythium oligandrum Po37, and three BCAâcommercial products containing Trichoderma atroviride SC1, Trichoderma koningii TK7 and Pseudomonas fluorescensâ+âBacillus atrophaeus on fungal infection in grafted plants and plant growth parameters.
[Results] The effectiveness of some BCA in reducing the incidence and severity of both diseases was dependent on the plant part analyzed and the plant age. No single BCA application was able to control both diseases. Streptomyces sp. E1â+âR4 were able to reduce significantly the infection of the most prevalent blackâfoot disease fungi while P. oligandrum Po37 and Trichoderma spp. were able to reduce significantly Phaeomoniella chlamydospora and Phaeoacremonium minimum (Petri disease) infection. BCA treatments had no effect on the shoot weight, and root weight was significantly lower in all BCA treatments with respect to the control.
[Conclusions] The combination of the diseaseâsuppressive activity of two or more beneficial microbes in a biocontrol preparation is required to prevent infection by blackâfoot and Petri disease fungi in vineyards.Peer reviewe