Ornamental And Turf Pest Control Exam Questions (243 Terms) With Verified Definitions Updated 2024

rejuvenation {Ans: Species such as forsythia, mockorange, spirea, potentilla and dogwood respond well to _____________________ which is the act of cutting all stems back to 4-8 inches from the ground.}Verticulum wilt {Ans: __________________________ is a common disease of many different kinds of plants including ornamentals. Especially common among maples and particularily small ornamental maples. Usually the leaves on a plant suddenly wilt. An overall yellowing of the foliage sometimes precedes this wilting. The wilted leaves may drop early or cling on. The internal symptoms in woody plants is discoloration of the sapwood in the twigs and branches or trunk - visible only after the plant has shown advanced stages of foliage wilt. Cause: Fungi Verticillium dahliae and V. albo-atrum. The fungus is spread by the movement of infected soil, contaminated seed, vegetative cuttings and nursery stock, and contaminated pruning tools and equipment and insects and airborne spores. Control: Plant disease free nursery stock. Clean tools. Fertilize in the spring to promote vigourous growth. Avoid applying excess nitrogen.}smaller {Ans: viruses and phytoplasmas are _________________ than bacteria and are spread mainly by contact between plants - often by vectors such as sucking insects like leafhoppers and aphids and also