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.
The plant produces small white, yellow, or green flowers. During the summer, leaves are green and the plant grows berries. In late summer, the leaves turn red and orange. Like poison ivy and poison sumac, poison oak releases an oil called urushiol when damaged. The allergen is absorbed into your skin when you touch the plant. According to the University of California Agriculture & Natural Resources, only about 15 to 20 percent of people arenât allergic to poison oak.