Other chemicals

Several chemicals, including fungicides, have been tried out for improving onion storage life. In general, these are not in wide use because they would appear unattractive to consumers by leaving visible residues. However, they may be very useful for preserving mother bulbs for seed production. Among substances with beneficial effects are S as SO2 (Thamizharazi and Narasimham, 1992), lime (Tanaka and Nonaka, 1981), car-bendazim (Srivastava et al., 1997), iprodione and streptocycline (Srivastava and Tiwari, 1997). Boron, applied postharvest as borax, extended the storage life of onions in Egypt (Alphonse, 1997).

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