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PSS 021 Exam 2 Questions & Answers 2024/2025 $7.99   Add to cart

Exam (elaborations)

PSS 021 Exam 2 Questions & Answers 2024/2025

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  • PSS 021

PSS 021 Exam 2 Questions & Answers 2024/2025 Plant signaling - ANSWERSplant releases defensive chemicals to help defend itself from herbivores pest management - ANSWERSstrategies to deal with harmful pests in agriculture chemical control - ANSWERSpesticide-substance or mixture of substan...

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  • August 14, 2024
  • 6
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • PSS 021
  • PSS 021
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PSS 021 Exam 2 Questions & Answers
2024/2025

Plant signaling - ANSWERSplant releases defensive chemicals to help defend itself from herbivores



pest management - ANSWERSstrategies to deal with harmful pests in agriculture



chemical control - ANSWERSpesticide-substance or mixture of substances intended for preventing pests



cultural controls - ANSWERSresistant varieties, crop rotation, intercropping, sanitation, phenological
asynchrony



alternatives to pesticides - ANSWERSGE crops, RNA inference, IPM, ecological and sustainable
agriculture, organic farming



biological control (3rd level) - ANSWERSthe use of living organisms to control pests, insects, weeds or
diseases



classical biological control - ANSWERSbio control agent, problem pest species, controls bug establishes
control and kills issue bug



inoculation - ANSWERSsmall numbers of natural enemies when pest population is very low to keep pest
at low numbers. find predator, inoculate, allow take off (specialist bug, PREVENTATIVE)



inundate - ANSWERSlarge numbers of natural enemies for an immediate reduction in pest population.
allow take off, CURATIVE



conservation - ANSWERSmake environment habitable for predators

, predators - ANSWERSbio control agent, kills prey immediately, exist outside prey, usually are larger than
prey. young adults find and consume the prey



parasitoids - ANSWERSbio control agent, kills hosts slowly, has one host per lifetime, exists inside or on
the host, adults find the prey and don't consume, the young consume but don't find



parasites - ANSWERSbio control agent, mostly do not kill prey, have one host per lifetime, exist inside/on
host, smaller than hosts, adults and young feed and often spend entire life on one host



predator characteristics - ANSWERSmostly mostly generalists, will prey on anything that meets certain
criteria. examples: beetles, lacewings, spiders, mites. not the best control agent so will feed on each
other



parasitoid characteristics - ANSWERSmostly specialists, not all, both ___ and prey have developed
defenses to protect themselves through time. effective when properly researched (curative)



pros of generalists - ANSWERScontrol multiple types of pests, don't require high population of pest



cons of generalists - ANSWERSmay not be effective



pathogens - ANSWERSdisease causing organisms



conservation agriculture principles - ANSWERS1.permanent organic soil cover (cover crops) 2.
diversification of crop species grown in sequences (time/place)

3. low tillage



organic agriculture - ANSWERSrotating crops, managing pests naturally, diversifying crop and livestock,
improving soil with compost and manures



agroecology - ANSWERSresponse science, transdisciplinary, engages social sciences and broader
agro/food system, roots in ecology and agronomy, reflection and action, participatory from different
players

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