Biological Notes on the Tea Small Tortrix(Adoxophyes Privatana WALKER)(Part 2)

概要

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1. The moths emerged from pupae at any time in a day, but the maximum emergence was observed during 13-15 o'clock. 2. Two active flying times of the moth were seen before or since 23-24 o'clock, and the eggs were laid most plentiful during 20-23 o'clock. 3. The average days of egg, larval and pupal stages were 6.2, 22 and 5 days respectively at 25°C and 75% of atmospheric humidity. 4. This species had not yet been caught in Hokkaido, but the trial ascertained that the larvae could winter at Sapporo. 5. The damage by the small tea tortrix was observed, on some varieties of the tea plant and some styles of the bush. 6. The serious outbreak of the larvae on the tea garden at Shirowa-mura, Shizuoka-prefecture after raced by the Dinah typhoon might be due to the sweep away of the egg parasite (Tricho-gramma dendrolimi MATSUASURA) by the typhoon as it was just at that time when the egg parasite moved most actively. 7. Every tea manufactured with the leaves, which had been attacked. by the small tea tortrix, tea leaf roller (Caloptilia theivola WALSING-HAM), red spider (Tetronychus japonicus HOTTA) and tea leaf hopper (Chlorita onukii MATSUDA) had no good qualities.
日本茶業技術協会の論文