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39 Cards in this Set
- Front
- Back
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True/ False-- Information about a tree's history and symptoms gained from a home owner can always be considered accurate
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False
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If a tree is not well suited for the site in which it has been planted, it may become (blank) predisposing it to other problems.
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Stressed
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A Common mistake in diagnosis is to carefully examine the above ground portion of the tree, while ignoring the (blank).
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Roots
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True/ False-- If a tree declines or dies within the first year following installation, a likely cause is excess or insufficient water.
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True
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Leaf scorch, girdling roots, and mineral deficiencies are examples of (blank) disorders
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abio
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name five causes of physical or mechanical injuries to trees.
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lawn mower/ streing treimmer
vandalism construction rodents guy wiring |
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insect damage to trees is usually the result of feeding or (blank)(blank).
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egg laying
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Name five insect pests of trees with chewing mouthparts. Nmae five with Piercing or sucking mouthparts.
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Chewing: beetles, caterpillars, weevils, leafminers, boreers, webworms
Piercing Sucking: aphids/or adelgids, scales, leafhoppers, mealybugs, true bugs, psyllids |
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Insects carry plant pathogens are said to be (Blank)
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Vectors
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True/ False-- Mites are not actually insects.
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True
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Microscopic worms that sometimes feed on trees and may carry diseases are called (Blank).
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False
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Name the four factos required for a tree disease.
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a. susceptible host
b. Pathogenic organism c. Suitable enviroment d. Proper Timing |
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True/False-- Vascular disease of trees are rarely fatal.
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false
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True/ False-- Diseases that affect only the foliage of a tree may not be serious problem unless defoliation occurs in sveral consecutive years.
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True
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True/ False-- Most fungi cause plant disease.
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False
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True/False -- The pathogens that cause plant diseases are premarily fungi
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True
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Fire blight is a example of a disease caused by a (Blank)
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Bacterium
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(Blank) is the chemical inhibition of growth and development of one plant by another.
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allelopathy
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True/ False-- Pollution damage is often difficult to diagnose because the symptoms may mimic other problems such as insect injury and mineral deficiencies.
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True
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Curling and cupping of the foliage, and parallel venation, are common symptoms of (Blank) damage
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herbacide
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What is: swollen plant tissue, often insect or mite induced
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Gall
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What is: Carrier of pathogens
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vector
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What is: localized dead tissue, often shrunken and discolored
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Canker
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Abnormal growth of multiple secondary shoots
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witchs broom
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May predispose a plant to other problems
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stress
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causal agent of disease
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pathogen
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natural chemical inhibition of growth
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allelopathy
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reduced growth
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stunting
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dead spots on the foliage
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leaf spot
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outline the steps to be taken in the process of diagnosing a tree problem.
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fill in the blank
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list the most common disease and isect problems in your region and categorize them by severity.
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fill in the blank
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Explain the procedure used in collection plant samples to be sent to a laboratory for diagnosis
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fill in the blank
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why is pollution damage often difficult to control? what other disorders have similar symptoms?
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fill in the blank
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Describe the ways that humans are contributing to the reduced life span of trees in the urban enviroment.
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fill in the blank
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a condition characterized by a cluster of dwafed shoots on affected twigs is called:
a. witchs broom b. anthracnose c. chlorosis d. verticillium wilt |
a. witchs broom
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twig dieback from periodical cicadas is premarily a result of:
a. ovipositing (egg-laying) b. adults feeding on the foliage c. larvae feeding on the roots d. feeding-induced galls on the twigs and foliage |
a. ovipositing (egg-laying)
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plant damage associated with a sap-feeding insect pest might appear as:
a. leaves that have been skeletonized b. distorted leaves or shoots c. leaf mines or blotches d. webs or tents in the tree |
b. distorted leaves or shoots
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scale damage to plants is the result of:
a. fungal spore growth depleting xylem reserves b. phloem-feeding insects causing a loss of vigor c. vascular damage from fungal invasion d. a physiological disorder due neither to insects nor to disease |
b. phloem-feeding insects causing a loss of vigor
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damage caused by nonliving factors tend to be:
a. uniform with definite borders b. uniform, but generally not affecting the new growth c. random and concentrated on the new growth d. random with irregular borders |
a. uniform with definite borders
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