Turf & Landscape Questions and Answers Already Passed
Question : Describe the kinds of damage arthropod pests can
cause.CORRECT ANSWER : Chewing mouth parts: tearing damage, notched or ragged leaves, holes in fruits and seeds, gridled stems, and chewed off roots Piercing-sucking mouth
parts (needle like feeding on plant tissue): yellowed leaves,
galls, and misshapen fruit (often mistaken by plant diseases) *Piercing mouth transmit diseases easier
Question : Describe the structural features of arthropods
including how their mouth parts determine what kind of damage they can cause.
CORRECT ANSWER : Invertebrates, exoskeleton,
paired/jointed legs and other appendages
Question : Explain how to distinguish insects from other
arthropods.CORRECT ANSWER : Insects: sometimes wings, 3 pairs of legs, antennae, 3 body region (head, thorax, abdomen)
Arachnids: no wings, no antennae, 4 pairs of legs, 2 body
regions (head/thorax, abdomen)
Question : Describe the differences between simple and
complete metamorphosis.CORRECT ANSWER : Simple (3 stages): egg, nymph, and
adult Complete (4 stages): egg, larva, pupa and adult
Question : Explain why it is important to know what kind of
metamorphosis a particular pest goes through.
CORRECT ANSWER : Management techniques can vary
depending on how the insect develops
Question : Explain how temperature and humidity affect
insect development.CORRECT ANSWER : Temp: how fast insects grow (too low - slow down and don't function, too high - die, higher
temps in threshold increase insect abilities) Humidity: some
insects require more or less, higher humidity increases probability for diseases (help control insect population)
Question : Describe some of the characteristics of the
common insect pests we discuss in this chapter.CORRECT ANSWER : White Grubs: beetle larvae that are found in the soil and damage sod and the roots of other plants
Ants: Issues occur with mounds (kill the queen) Black
Cutworms: larvae, or caterpillar stage that does the damage,
clips off grass blades and shoots with chewing mouth parts
Sod web warms: caterpillar stage does the damage Clinch
bugs: sucking mouth parts that inject toxic saliva into various
turf grass species Japanese beetles: adults feed and damage
foliage and flowers Sawflies: can cause significant damage to
forests and landscapes Emerald Ash Borer: adults cause
minimal damage to ash trees, larvae tunnel under the bark in the tree's cambium layer that effect the tree
Question : List the advantages and disadvantages of using
insecticides.CORRECT ANSWER : Advantages: 1. Effective against thousands of economically damaging pests. 2. Can be used to combat several different pests on a given plant 3. Act quickly
- Large arsenal to combat even new pests 5. Usually
available and many suitable formulations and application
equipment Disadvantages: 1. Often eliminate beneficial
insects, allowing them to rebound quickly (increased dependence on insecticides) 2. Can lead to resistance after repeated exposure 3. Yearly dependence is an added cost 4.Potential for drift, residues and damage to beneficial insects.(hazards to humans and environment)
Question : Determine what determines whether a given plant
is a weed.
CORRECT ANSWER : If the plant is unwanted
Question : List the two main goals of weed management.
CORRECT ANSWER : Minimize weed competition, Limit
weed's reproduction
Question : Describe ways that weeds can pose problems in
turf and landscapes.
CORRECT ANSWER : 1. Interfere with management
practices 2. Produce chemical inhibitors that directly retard growth of desirable plants 3. Create a poor impression on customers 4. Interfere with pesticide applications 5. Support insect pests and plant diseases or provide cover for rodents 6.