Brown spot
Alternaria longipes
The first symptoms of brown spot disease are small, circular, dark-brown lesions on the lower leaves of field plants and sometimes on old seedlings or the senescing leaves of transplants. The lesions enlarge as the leaves mature and are surrounded by an irregular, yellow halo. The halo is caused by the secretion of toxins. Often there are numerous lesions, about 25 mm in diameter, which may coalesce and affect more than 80% of the leaf area. Large lesions may have numerous small, satellite circular lesions in their vicinity, arising from conidia washed off the main lesion.
Pesticides
Antracol
intensity: ★★★
Axiom MZ 720
intensity: ★★★
Dithane Rainshield Neo Tec
intensity: ★★★
Frenta 750 WG
intensity: ★★★
Penncozeb
intensity: ★★★
Ridomil Gold MZ WG
intensity: ★★★
Rotam Milor 720 WP
intensity: ★★★
Rotam Winner Mancozeb WP
intensity: ★★★
Zeemil MZB 720 WP Systemic and Protective
intensity: ★★★
Arysta LifeScience Mancozeb 750 WG
intensity: N/A
Iprodione
intensity: N/A
Mancoflo
intensity: N/A
Manzeb
intensity: N/A
Maxyl
intensity: N/A
Medley Mz
intensity: N/A
Metal-Man Mz 720
intensity: N/A