Australia

Late blight (potato blight, foliar blight)

Phytophthora infestans

Description

Late blight of potato is identified by black/brown lesions on leaves and stems that may be small at first and appear water-soaked or have chlorotic borders, but soon expand rapidly and become necrotic. In humid conditions, Phytophthora infestans produces sporangia and sporangiophores on the surface of infected tissue. This sporulation results in a visible white growth at the leading edge of lesions on abaxial (lower) surfaces of leaves. As many lesions accumulate, the entire plant can be destroyed in only a few days after the first lesions are observed.

Pesticides
Acrobat
intensity: ★★★
Acrobat MZ 690
intensity: ★★★
Acrobat SC
intensity: ★★★
Acrobat WDG
intensity: ★★★
Aero
intensity: ★★★
Affix 250 SC
intensity: ★★★
Alto 100 SL
intensity: ★★★
Amistar 250 SC
intensity: ★★★
Amistar Top
intensity: ★★★
Antracol
intensity: ★★★
Aprisco 900 WG
intensity: ★★★
Axiom MZ 720
intensity: ★★★
Az 250
intensity: ★★★
Azaka
intensity: ★★★
Bravo
intensity: ★★★
Bravo Weather Stik
intensity: ★★★
Cavalry Weatherguard
intensity: ★★★
Cherokee 900
intensity: ★★★
Conan 720 SC
intensity: ★★★
Crop Culture Azoxy 250
intensity: ★★★
Cupro Isagro 375 WG
intensity: ★★★
Dithane Rainshield Neo Tec
intensity: ★★★
FMC Chlorothalonil 720
intensity: ★★★
FMC Chlorothalonil Bond 720
intensity: ★★★
Frenta 750 WG
intensity: ★★★
Isacop
intensity: ★★★
Kocide Blue Xtra
intensity: ★★★
Manzate DF
intensity: ★★★
Mirador 250 SC
intensity: ★★★
Neoram 375 WG
intensity: ★★★
Ospray Copper Oxychloride-WP
intensity: ★★★
Penncozeb
intensity: ★★★
Penncozeb 750 DF
intensity: ★★★
Polyram DF
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: ★★★
Zeemil 720 WG Systemic and Protective
intensity: ★★★
Zeemil MZB 720 WP Systemic and Protective
intensity: ★★★
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
Barmac Zineb
intensity: N/A
Barrack 720
intensity: N/A
Barrack Betterstick
intensity: N/A
Blue Shield DF
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
Copper Oxychloride
intensity: N/A
Echo 720
intensity: N/A
Emblem
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
Metal-Man Mz 720
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