Germination of Apple Pollen as Influenced by Fungicides
DOI:
https://doi.org/10.71318/apom.1978.32.1.12Abstract
Pollen collected from two apple cultivars was tested in the laboratory for germinability in solutions of the fungicides or bactericides which are commonly applied during bloom to control apple diseases. Dodine significantly ( P= 0.01) reduced ‘Jonathan’ and ‘Golden Delicious’ pollen germination. Pollen grains which did germinate, however, produced germ tubes which elongated at the same rate as controls. Streptomycin at 50 ppm had no effect on either germination or germ tube elongation of ‘Golden Delicious’ pollen but significantly ( P= 0.01) reduced germination at 100 ppm. All fungicides applied at recommended rates for disease control significantly ( P= 0.01) reduced apple pollen germination. Benomyl and sulfur affected pollen germination the least while the dithiocarbamate fungicides (zineb, metiran, dinocap-mancozeb) and captan proved most toxic.
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