Plant Disease (2010) 94, 325-328

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Kai-Shu Ling (2010)
Effectiveness of chemo- and thermotherapeutic treatments on Pepino mosaic virus in tomato seed
Plant Disease 94 (3), 325-328
Abstract: Pepino mosaic virus (PepMV) is a seedborne virus of importance in greenhouse tomato. The ease of mechanical transmission of PepMV from contaminated tomato seed to seedlings makes commercial tomato seed a potential source of initial virus inoculum. The objective of this study was to evaluate the effectiveness of chemo- and thermotherapeutic treatments on PepMV using seed from a commercial hybrid tomato seed lot. The effect of various seed treatments was evaluated through bioassay with mechanical inoculation of the treated seed extract on indicator plants (Nicotiana benthamiana). Three commonly used seed-treatment chemicals and two thermo-treatment methods were evaluated. The most effective chemical was the commercial bleach solution (0.5 and 1.0% sodium hypochlorite), followed by trisodium phosphate. On the other hand, hydrochloric acid treatments were not effective. Under the stated chemotherapeutic treatment conditions, the rate of seed germination was not significantly affected. With thermotherapeutic treatments, although hot water soaking for 2 h at 55°C deactivated virus infectivity, it also resulted in a detrimental effect on seed germination. However, treatment with dry-heat baking (72 or 80°C for 48 to 72 h) was effective in reducing PepMV infection with minimum impact on seed germination.
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Database assignments for author(s): Kai-Shu Ling

Research topic(s) for pests/diseases/weeds:
control - general
transmission/dispersal of plant diseases

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Pepino mosaic virus Tomato (Solanum lycopersicum)