Vegetable perilla, "Ipdlkkae 1"(Perilla frutescens var japonica Hara), was tested about the flowering and maturing responce in summer and winter. In summer season, it was researched about those responses according to the change of seeding date from May 15th to Oct. 15th at one month interval in the field. "Ipdlkkae 1" flowered Oct. 2nd under the day length of eleven hours and fourty-one minutes, compared with Sep. 6th (day length of twelve hours and fourty-three minutes) of "Yepsildlggae". And those responses showed that vegetable perilla was have to seeded before July 15th for two reason. The first is a unique response of perilla to day length. If perilla stay under short-day condition for some days, perilla will flower after four weeks. The second is a weather, especially frost and cold. In the test of latest seeding at Oct. 15th, the plants flowered more late than normal flowering period and they were not able to mature for frost of early winter. And this result showed that any other species, which has the characteristic of later flowering than that of "Ipdlkkae 1", could not able to mature in the field. In winter time, this species was tested about the same responses according to the change of short-day treatments. In the case of the test from May 1st (above fourteen hours day length), even if the test plants were stayed under short-day condition for more than 10 days, they were not able to mature, but flowerd. From the test of Apr. 15th, day length of thirteen hours, the plants were showed variable reaction to the short-day treatment. In this test, 11days for short-day treatment was a basic day to decide whether flowering was delayed or not. In the test from Apr. 1st, perilla seeds were able to harvest at least 5 days short-day treatment. In the final test from Mar. 15th, it had no need to take short-day treatment for harvesting of normal seeds, because the day length of that are twelve hours, which is an enough time to induce flowering and maturing, previously reported.

율무를 논과 밭 상태에서 파종기와 재식밀도를 달리하여 지상ㆍ지하부 생육 및 광합성량과 병충해 발생에 관한 시험을 실시한 결과를 요약하면 다음과 같다. 1. 논 상태에서 자란 을무가 밭 상태에서 자란을 무보다 상장은 짧았으나 분습수는 많았고 도복 및 병충서 피해가 적었을 뿐만 아니라 광합성 능력과 지하부 생육도 양호하여 천립중 및 종보수량이 증대되 었다. 2. 밭 상테에서는 파종기가 빠를수록 엽고통 피해가 현저하여 불억률이 높고 천립중이 감소되어 수량이 저하하였고 논 상태에서는 적파구(5월 15일 파종)에서 증수되 었다. 3. 전ㆍ답별 파종기에 따라서는 수량에 유의성 및 상호작용의 효과가 인정되었으나 재식밀도에 따라서는 생육 및 수량의 차리에 유의성이 없었다.