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.
To aid in prevention, the only way to do this is to double trench around the tree. Oak wilt can travel thru the roots system of the same species and infect other trees. If you have different species, it is unlikely that they will transfer the wilt, but it has happened. Trenching can stop this by severing the connected roots of adjacent trees.