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Protection of pepper crops under glass against PepMV artificial infection with the mild mutant M-1: analysis of its influence on growth and yield

M. Tanzi, L. Betti and A. Canova
Advances in Horticultural Science
Vol. 2, No. 1 (1988), pp. 19-22
Stable URL: http://www.jstor.org/stable/42881339
Page Count: 4
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Protection of pepper crops under glass against PepMV artificial infection with the mild mutant M-1: analysis of its influence on growth and yield
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Abstract

A study carried out with the mild mutant M-1 obtained from a P₁₋₂₋₃ strain, is reported. It was used for cross protection against the severe strain PepMV 10 on a pepper cultivation in greenhouse. Its influence on flowering and yield was analyzed, using the TMV susceptible cultivar XPH 833 and the resistant one NUN 3364. In the first cultivar, M-1 does not affect the susceptible plant flowering and it is also efficient in cross protection, whereas the flowering of plants inoculated with PepMV 10 was lower. The early yield of M-1 inoculated plants was identical to that of the control, but it became lower in challenged plants and in those inoculated with PepMV 10. The total yield of cv. XPH 833 was unaffected in the plants inoculated with M-1 and in those challenged, but it decreased in the PepMV 10 inoculated plants. These findings were confirmed by using the cv NUN 3364, but this variety was quite susceptible to the mutant. It was also susceptible to all the other inoculations made, so, it could be considered as a varietal susceptibility. Thus, M-1 might be proposed as a protective strain, but detailed studies of its diffusion within the plant and the concentration of the challenge inoculum required to infect protected plants in natural conditions are needed.

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