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Updated: Jan 29, 2026
08:58
An Effective Inoculation Method for Phytophthora capsici on Black Pepper Plants
Published on: September 16, 2022
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Managing Phytophthora Crown and Root Rot in Bell Pepper Using Fungicides and Host Resistance
1former Graduate Research Assistant.
Plant Disease
|February 14, 2019
Summary
A resistant pepper cultivar, Paladin, showed less plant death from Phytophthora crown and root rot. Fungicide drenches were more effective than foliar sprays for disease control.
Area of Science:
- Plant Pathology
- Agricultural Science
- Horticulture
Background:
- Phytophthora crown and root rot is a significant disease affecting pepper production.
- Developing effective disease management strategies is crucial for maintaining crop yields.
Purpose of the Study:
- To evaluate the efficacy of a resistant pepper cultivar and nine fungicides in controlling Phytophthora crown and root rot.
- To compare the effectiveness of different application methods (foliar spray vs. drench) and intervals for fungicide treatments.
Main Methods:
- A resistant pepper cultivar (cv. Paladin) and a susceptible cultivar (cv. Red Knight) were inoculated with Phytophthora capsici.
- Fungicides were applied via foliar spray in the field and as foliar spray or drench in the greenhouse at specified intervals.
- Plant death was assessed to determine treatment efficacy.
Main Results:
- The resistant cultivar 'Paladin' exhibited significantly lower plant death compared to the susceptible cultivar 'Red Knight' in both field and greenhouse trials.
- Fungicides fluopicolide and mandipropamid significantly reduced plant death in field trials compared to untreated controls.
- In greenhouse experiments, all tested factors (cultivar, fungicide, application method, interval) and their interactions significantly influenced disease control.
- Drench applications of fungicides provided superior control of Phytophthora capsici compared to foliar sprays.
Conclusions:
- The use of a resistant pepper cultivar, such as 'Paladin', can reduce losses from Phytophthora crown and root rot.
- Fungicide application as a drench is more effective than foliar sprays for managing this disease.
- Integrating resistant cultivars with appropriate fungicide application strategies, particularly drenches, offers a promising approach to mitigate Phytophthora crown and root rot in pepper crops.
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