QUESTIONS AND CORRECT ANSWERS
GRADED A+
◉ Why not all organisms pests? Answer: Depends on context of where
and what the organisms doing
◉ Major pest categories. Answer: Insects, insect-like organisms, weeds,
disease agents (microbial organisms), vertebrate animals
◉ Main goal of pest management. Answer: Keep pestering population's
tolerable
◉ Points to consider before choosing to manage pests. Answer: -
Control only when causing/expected to cause more harm than reasonable
- use control strat to reduce pest numbers to acceptable level
- cause little harm possible to everything else
- even tho present might not do much harm
◉ Why specific pests might be named on label. Answer: Risks of using
that product are associated with where/how product is applied rather
than what organism is aimed at
,◉ Key ideas/goals of Integrated Pest Management (IPM). Answer: Goal:
prevent pests from reaching damaging levels w/ least risk to
environment
Ideas: ecological, unified approach and manages populations with
avoiding economic damage and to minimize adverse side effects
◉ Insect mouthpart damage. Answer: - chewing mouthpart: bite/tear
food
- piercing-sucking: penetrate plant tissue and can transmit disease
(yellowing of leaves, galls, brown dead spots)
◉ Structural features of arthropods. Answer: Invertebrates, exoskeleton,
paired/jointed legs
◉ Insects v arachnids. Answer: Insects: 3 body regions, 3 pairs of legs,
antennas and sometimes wings
Arachnid: 2 body regions, 4 pairs of legs
◉ simple metamorphosis. Answer: egg, nymph, adult
◉ complete metamorphosis. Answer: egg, larva, pupa, adult - molt and
have different mouthparts than adults
, ◉ Temperature effect on insects. Answer: Effect activity, rate of
development, reproduction - developmental threshold temperatures
◉ Humidity effect on insects. Answer: Insects may have stress during
low humidity as they lose water w evaporation - high humidity more
disease chance
◉ Advantages of insecticides. Answer: - Effective against 1000s of pests
- individual and combo insecticides can combat several pests
- fast acting
- new pests face arsenal of compounds that are effective
-effective insecticides and formulations/applications available
◉ Disadvantages of insecticides. Answer: - often eliminate beneficial
insects (pest resurgence can happen)
- repeated exposure can lead to resistance
- yearly dependence is added cost
- potential for drift, residue, damage to beneficial insects
◉ What determines a weed? Answer: Unwanted plants
◉ 2 main goals of weed management. Answer: 1. Minimize weed
competition and yield loss