#phytophthora

[her-mosaic-monet]

phytophthora

The roots that hold my

family tree in place are sunk

in acid and ash.

[oaresearchpaper]

This study aimed at selecting cocoa tree endophytic bacteria antagonistic to Phytophthora spp. in view to produce a new biofungicide capable of controlling black pod disease. Endophytic bacteria were isolated from healthy organs (roots, leaves and stems) of young nurseries of two clones NA32 and P7. These isolates were confronted in vitro with two Phytophthora species (Phytophthora palmivora and Phytophthora megakarya). Leaf and detached pod tests were carried out in a four-factor split-plot randomized experimental design. At total, 116 endophytic bacteria were isolated. These bacteria inhibited the radial growth of Phytophthora by 25.3±1.5 to 70.54±2.14%. Four isolates 48P, 60P, 23P and 18N were more effective in in vitro tests. The susceptibility index of the clone NA32 was reduced from 3.0 to 0.97 on leaf discs and from 7.57 to 1.27 on detached pods. These endophytic bacteria induced resistance to clone NA32 and increased the intrinsic resistance of clones PA150 and SCA6. Endophytic bacteria can be used for biocontrol of black pod disease. However, field trials are needed to confirm the stability of these laboratory results.

[oaresearchpaper]

This study aimed at selecting cocoa tree endophytic bacteria antagonistic to Phytophthora spp. in view to produce a new biofungicide capable of controlling black pod disease. Endophytic bacteria were isolated from healthy organs (roots, leaves and stems) of young nurseries of two clones NA32 and P7. These isolates were confronted in vitro with two Phytophthora species (Phytophthora palmivora and Phytophthora megakarya). Leaf and detached pod tests were carried out in a four-factor split-plot randomized experimental design. At total, 116 endophytic bacteria were isolated. These bacteria inhibited the radial growth of Phytophthora by 25.3±1.5 to 70.54±2.14%. Four isolates 48P, 60P, 23P and 18N were more effective in in vitro tests. The susceptibility index of the clone NA32 was reduced from 3.0 to 0.97 on leaf discs and from 7.57 to 1.27 on detached pods. These endophytic bacteria induced resistance to clone NA32 and increased the intrinsic resistance of clones PA150 and SCA6. Endophytic bacteria can be used for biocontrol of black pod disease. However, field trials are needed to confirm the stability of these laboratory results.

[oaresearchpaper]

Biocontrol of black pod disease in Côte d’Ivoire through the selection of cocoa tree (Theobroma cacao L.) endophytic bacteria antagonist of Phytophthora spp.

This study aimed at selecting cocoa tree endophytic bacteria antagonistic to Phytophthora spp. in view to produce a new biofungicide capable of controlling black pod disease. Endophytic bacteria were isolated from healthy organs (roots, leaves and stems) of young nurseries of two clones NA32 and P7. These isolates were confronted in vitro with two Phytophthora species (Phytophthora palmivora and Phytophthora megakarya). Leaf and detached pod tests were carried out in a four-factor split-plot randomized experimental design. At total, 116 endophytic bacteria were isolated. These bacteria inhibited the radial growth of Phytophthora by 25.3±1.5 to 70.54±2.14%. Four isolates 48P, 60P, 23P and 18N were more effective in in vitro tests. The susceptibility index of the clone NA32 was reduced from 3.0 to 0.97 on leaf discs and from 7.57 to 1.27 on detached pods. These endophytic bacteria induced resistance to clone NA32 and increased the intrinsic resistance of clones PA150 and SCA6. Endophytic bacteria can be used for biocontrol of black pod disease. However, field trials are needed to confirm the stability of these laboratory results.

[oaresearchpaper]

PPT - Biocontrol of black pod disease in Côte d’Ivoire through the selection of cocoa PowerPoint Presentation - ID:12979280

This study aimed at selecting cocoa tree endophytic bacteria antagonistic to Phytophthora spp. in view to produce a new biofungicide capable of controlling black pod disease. Endophytic bacteria were isolated from healthy organs (roots, leaves and stems) of young nurseries of two clones NA32 and P7. These isolates were confronted in vitro with two Phytophthora species (Phytophthora palmivora and Phytophthora megakarya). Leaf and detached pod tests were carried out in a four-factor split-plot randomized experimental design. At total, 116 endophytic bacteria were isolated. These bacteria inhibited the radial growth of Phytophthora by 25.3±1.5 to 70.54±2.14%. Four isolates 48P, 60P, 23P and 18N were more effective in in vitro tests. The susceptibility index of the clone NA32 was reduced from 3.0 to 0.97 on leaf discs and from 7.57 to 1.27 on detached pods. These endophytic bacteria induced resistance to clone NA32 and increased the intrinsic resistance of clones PA150 and SCA6. Endophytic bacteria can be used for biocontrol of black pod disease. However, field trials are needed to confirm the stability of these laboratory results.

[oaresearchpaper]

This study aimed at selecting cocoa tree endophytic bacteria antagonistic to Phytophthora spp. in view to produce a new biofungicide capable of controlling black pod disease. Endophytic bacteria were isolated from healthy organs (roots, leaves and stems) of young nurseries of two clones NA32 and P7. These isolates were confronted in vitro with two Phytophthora species (Phytophthora palmivora and Phytophthora megakarya). Leaf and detached pod tests were carried out in a four-factor split-plot randomized experimental design. At total, 116 endophytic bacteria were isolated. These bacteria inhibited the radial growth of Phytophthora by 25.3±1.5 to 70.54±2.14%. Four isolates 48P, 60P, 23P and 18N were more effective in in vitro tests. The susceptibility index of the clone NA32 was reduced from 3.0 to 0.97 on leaf discs and from 7.57 to 1.27 on detached pods. These endophytic bacteria induced resistance to clone NA32 and increased the intrinsic resistance of clones PA150 and SCA6. Endophytic bacteria can be used for biocontrol of black pod disease. However, field trials are needed to confirm the stability of these laboratory results.

[melangle]

the dead trees are Karri Eucalyptus diversicolor, killed by dieback phytopthora cinnamoni 

[johnkempf]

Fungal mycelium and shutting down phytophthora in peppers

A pepper field had Phytophthora problems. Ridomil Gold treatments were known to be completely ineffective. Instead of anti-biotics, we applied pro-biotics, microbial inoculants of mycorrhizal fungi, a range of bacterial species, and biostimulants through the drip irrigation system. Within weeks the soil is filled with these thick strands of mycelium/plant roots and the crop recovered completely. The phytophthora symptoms disappeared. What have you seen something similar to this in the soil? What do you think this might be? Read the full article