Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Oil palm trees in Padang Halaban Estate (Indonesia): (a) Healthy tree, (b) tree attacked by ganoderma: the lower leaves have reclined to form a skirt-like crown, (c) several unopened spears at the top of a sick tree canopy, (d) yellowing and early necrosis on leaves of a sick tree.
