from English Grammar Today. Efficient and effective are adjectives. We use efficient to describe something or someone that works in a quick and organised way: The new online banking system offers a convenient and efficient way to check your account. [extract from a reference for someone applying for a job]
Main Disease. Oak wilt is caused by the fungus Ceratocystis fagacearum which develops in the outer sapwood of the tree. The infected tree reacts by developing tyloses and gums which subsequently restrict the flow of water and nutrients in affected vascular tissues with the result that the tree wilts and subsequently dies (French & Stienstra, 1980). Host Range.
Crown Rot. Crown rot is often the cause of splitting and oozing near the base of an oak's trunk. Caused by one of several types of fungus, crown rot causes the tree's leaves to turn yellow and wilt, and the small branches to die back. It also causes lesions on exposed areas of large roots and the trunk base.