Preharvest high-intensity, pulsed polychromatic light and low-intensity UV-C treatments control Botrytis cinerea on lettuce (Lactuca sativa)
G. Scott, M. Dickinson and G. Shama
European Journal of Plant Pathology 159: 449–454.
2021
บทคัดย่อ
Hormetic treatments using high-intensity, pulsed polychromatic light (HIPPL) and low-intensity UV-C (LIUV) can control Botrytis cinerea on lettuce (Lactuca sativa) in a controlled environment. For the cv. Temira, 48 pulses of HIPPL significantly reduced mean disease progression (26%), while 0.64 kJ/m2 of LIUV gave reductions of 27%. No LIUV or HIPPL treatment significantly reduced disease progression for cv. Amica. A 0.98 kJ/m2 dose of LIUV and 24 pulses of HIPPL, however, reduced mean disease progressions (25% and 15%) when compared to the control. Phytotoxicity was observed at 48 and 72 pulses of HIPPL for Amica and Temira, respectively. LIUV caused phytotoxicity on both cvs. above 0.98 kJ/m2 but at a reduced incidence for Temira. Both technologies delivered a similar level of disease control on cv. Temira and may provide a residue-free alternative to the chemical control of plant pathogens. HIPPL treatments, however, were achieved in 15 s and may prove to be a more commercially feasible alternative to LIUV with a treatment duration of 32 s.