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How Does Botrytis cinerea Infect Red Raspberry?

O Kozhar1, T L Peever1

  • 1First and second author: Department of Plant Pathology, Washington State University, P.O. Box 646430, Pullman 99164.

Phytopathology
|June 6, 2018
PubMed
Summary
This summary is machine-generated.

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Gray mold (Botrytis cinerea) colonization of raspberry fruit is more significant later in development, not just during bloom. Understanding this infection timing is key for better disease management strategies.

Area of Science:

  • Plant Pathology
  • Mycology
  • Horticultural Science

Background:

  • Botrytis cinerea causes significant gray mold disease in raspberries.
  • Current fungicide applications are calendar-based due to poor understanding of raspberry disease cycles.

Purpose of the Study:

  • To investigate the disease cycle of Botrytis cinerea on red raspberry.
  • To identify critical infection periods and environmental factors influencing gray mold development.

Main Methods:

  • Botrytis cinerea isolation from raspberry flowers and fruit across seven developmental stages.
  • Data collection in a fungicide-untreated field over two seasons (2015-2016).
  • Correlation analysis with environmental factors (temperature, rain, leaf wetness).

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Main Results:

  • Flower colonization by B. cinerea was low, but increased significantly in developing and mature fruit (up to 67%).
  • Early colonization occurred in carpels, spreading to other floral parts as fruit matured.
  • Environmental factors like temperature, rain, and leaf wetness duration positively correlated with B. cinerea colonization.

Conclusions:

  • The bloom period is not the critical window for Botrytis cinerea colonization.
  • Later colonization of developing fruit is more crucial for gray mold development.
  • Findings can improve gray mold management strategies for raspberries.