Schefflera (Brassaia) Diseases

Disease	Symptoms	Pathogen/Cause	Management
Alternaria Leaf Spot	Large dark brown spots form on leaves and may have a yellow halo.	Alternaria panax	Avoid overhead watering. Apply iprodione, thiophanate methyl + mancozeb, or mancozeb to protect leaves.
Bacterial Leaf Spot	Small, tan to yellow, corky, irregularly shaped spots form on the lower surface of the leaf. Spots up to 1/4 inch in diameter turn dark brown.	Xanthomonas campestris pv. hederae	Purchase plants free from the disease. Avoid overhead watering. Check nearby English ivy (Hedera helix) for bacterial leaf spot. Remove infected plants.
Cold Injury	Dead areas form on leaves up to several days after exposure.	Temperatures below 50 degrees F	Do not place plants near air conditioners. Maintain temperatures above 50 degrees F.
Leaf Yellowing	Leaves become light green or completely yellow. Stems are spindly and weak.	Low light intensity	Provide some and no more than 16 hours of light per day at 150 ft. candles.

COMMON NAME	TRADE NAME
iprodione	Chipco 26019
mancozeb	Dithane, Mancozeb
thiophanate methyl + mancozeb	Zyban, Duosan