Australia

Downy mildew of Grapes

Plasmopara viticola

The first symptom to occur includes irregular, yellow spots on the surface of the leaves. Over time, if one follows these spots through a cross-section of the leaf to the bottom, bunches of sporangia will be found. Sporangia will form the “white downy” appearance of the leaves, giving the pathogen it’s common name. As the disease progresses, the yellow surface spots turn brown due to necrosis, death, of the plant tissue. Furthermore, the underside of the leaves progress from a white color to grey. The ultimate result is premature defoliation, when the infected leaves detatch from the stem. Moving from symptoms of the leaves to that of the grapes, when the pathogen is present, the growing fruit become covered with the sporangiophores. This results possible thickening of the fruit “skin” or distortion of shape. A color change from purple to a reddish brown can be noted as well as a mosaic pattern when the grapes are infected.

Pesticides
Acrobat
intensity: ★★★
Acrobat MZ 690
intensity: ★★★
Acrobat SC
intensity: ★★★
Acrobat WDG
intensity: ★★★
Affix 250 SC
intensity: ★★★
Amistar 250 SC
intensity: ★★★
Aprisco 900 WG
intensity: ★★★
Axiom MZ 720
intensity: ★★★
Axiom Plus
intensity: ★★★
Az 250
intensity: ★★★
Azaka
intensity: ★★★
Bravo Weather Stik
intensity: ★★★
Cabrio
intensity: ★★★
Cabrio WG
intensity: ★★★
Captan 800 WG
intensity: ★★★
Cavalry Weatherguard
intensity: ★★★
Cherokee 900
intensity: ★★★
Conan 500
intensity: ★★★
Conan 720 SC
intensity: ★★★
Crop Culture Azoxy 250
intensity: ★★★
Cupro Isagro 375 WG
intensity: ★★★
Cuprofix Bordeaux Mixture
intensity: ★★★
Cuprofix Disperss Bordeaux Mixture
intensity: ★★★
Cuprofix Plus
intensity: ★★★
Custodia 320 SC
intensity: ★★★
Delan 700 WG
intensity: ★★★
Dithane Rainshield Neo Tec
intensity: ★★★
FMC Captan 900
intensity: ★★★
FMC Chlorothalonil 720
intensity: ★★★
FMC Chlorothalonil Bond 720
intensity: ★★★
Frenta 750 WG
intensity: ★★★
Galben M
intensity: ★★★
Isacop
intensity: ★★★
Kocide Blue Xtra
intensity: ★★★
Kocide Opti
intensity: ★★★
Manzate DF
intensity: ★★★
Mirador 250 SC
intensity: ★★★
Neoram 375 WG
intensity: ★★★
Novofix
intensity: ★★★
Ospray Captan WG
intensity: ★★★
Ospray Copper Oxychloride-WP
intensity: ★★★
Penncozeb
intensity: ★★★
Penncozeb 750 DF
intensity: ★★★
Polyram DF
intensity: ★★★
Revus
intensity: ★★★
Ridomil Gold MZ WG
intensity: ★★★
Ridomil Gold Plus
intensity: ★★★
Rotam Aprisco
intensity: ★★★
Rotam Escudo 250 SC
intensity: ★★★
Rotam Milor 720 WP
intensity: ★★★
Rotam Winner Mancozeb WP
intensity: ★★★
Sphinx
intensity: ★★★
tradewyns Blu-Cop 400DF
intensity: ★★★
Uniguard 500 WP
intensity: ★★★
Unizeb Disperss 750 DF
intensity: ★★★
Zampro
intensity: ★★★
Zee-Mil Plus Systemic
intensity: ★★★
Zeemil 720 WG Systemic and Protective
intensity: ★★★
Zeemil MZB 720 WP Systemic and Protective
intensity: ★★★
Flint 500 WG
intensity: ★
Amicus Blue
intensity: N/A
Amistar WG
intensity: N/A
Arysta LifeScience Copper Oxychloride 50 WP Fungicide/Bactericide
intensity: N/A
Arysta LifeScience Copper Oxychloride WP Fungicide/Bactericide
intensity: N/A
Arysta LifeScience Mancozeb 750 WG
intensity: N/A
Azoxyguard 250 SC
intensity: N/A
Barmac Copper Oxychloride
intensity: N/A
Barrack 720
intensity: N/A
Barrack Betterstick
intensity: N/A
Blue Shield DF
intensity: N/A
Capitaine 900 WG
intensity: N/A
Captan 800WG
intensity: N/A
Captan 900WG
intensity: N/A
Captan WG
intensity: N/A
Chlornil 720 SC
intensity: N/A
Chloronil Pro
intensity: N/A
Chlorothalonil
intensity: N/A
Clash Dry 900 WG
intensity: N/A
Clash Storm Guard 720 SC
intensity: N/A
Copman
intensity: N/A
Copper Oxychloride
intensity: N/A
Cuprofix Crop Care Australasia
intensity: N/A
Dragon 700 WG
intensity: N/A
Duplex WG
intensity: N/A
Echo 720
intensity: N/A
Isagro Neoram 375 WG
intensity: N/A
Liquicop
intensity: N/A
Manco 750 WG
intensity: N/A
Mancoflo
intensity: N/A
Mancoflo 420 SC
intensity: N/A
Mankocide DF
intensity: N/A
Manzeb
intensity: N/A
Maxyl
intensity: N/A
Medley Mz
intensity: N/A
Medley Plus
intensity: N/A
Metal-Man Mz 720
intensity: N/A
Metalaxyl+Copper oxychloride WP
intensity: N/A
Orthocide WG
intensity: N/A
Pacific Echo 500 SC
intensity: N/A
Spartacus 250 SC
intensity: N/A
Spartacus 500 WG
intensity: N/A
Supernova 250SC
intensity: N/A