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Flower & Fruit Injury

Flower & Fruit Injury. Apple scab on apple (right). Codling moth in apple. Left: Western flower thrips feeding injury on impatiens. Above: Bean pod mottle virus in soybeans (left) vs. uninfected beans (right). Weed Effects. Weed Groups Algae (aquatic systems)

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Flower & Fruit Injury

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  1. Flower & Fruit Injury Apple scab on apple (right) Codling moth in apple Left: Western flower thrips feeding injury on impatiens. Above: Bean pod mottle virus in soybeans (left) vs. uninfected beans (right)

  2. Weed Effects Weed Groups • Algae (aquatic systems) • Mosses/liverworts (turf & nurseries) • Ferns/horsetails (pastureland, horticultural crops) • Gymnosperms (rangeland, forests, long-term no-till systems) • Angiosperms [monocotyledon & dicotyledon] (annuals, biennials, perennials)

  3. Weed Impacts • Competitive -- yield loss (quantity and quality) • Parasitic effects (cf Norris et al., p 23 – 24) • Mechanical interference with farm implements • Other incidental • Seed contamination • Land valuation • Health & safety (hay fever, toxins, fire hazard)

  4. Comparative Biology of Pests Chapter 5 is divided into 3 principal segments • Concepts in Pest Population Regulation • Dissemination, Invasion, and Colonization Processes • Pest Genetics

  5. Comparative Biology of Pests • Concepts in Pest Population Regulation • Reproduction • Fecundity & Fertility • Population Generation Time • Longevity & Mortality • Quiescence and Dormancy • Heat Summation & Degree Days • Molting & Metamorphosis • Life Tables • Basic Life Cycle Models

  6. 1. Reproduction Note: Many serious species have both sexual & asexual periods or stages.

  7. Individual and Population Development Time • Includes: • Fecundity & Fertility • Population Generation Time • Cycles per Season • Longevity and Mortality • Affects management response time

  8. Management Response Time • The amount of time between when a decision to control a pest is made and when that control takes effect. • Primarily used for rescue treatments. • Directly affects action thresholds.

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