ISHS Acta Horticulturae 396: Hydroponics and Transplant Production
TOMATO AND PEPPER TRANSPLANT RESPONSE TO CUPRIC HYDROXIDE TREATMENT OF PRODUCTION FLATS |
| Author: | J.G. Latimer |
| Keywords: | Cupric hydroxide, Spin OutTM, Tomato, Lycopersicon esculentum, Pepper, Capsicum annuum, Transplant production |
| Abstract:
'Sunny' tomato (Lycopersicon esculentum Mill.) and 'Jupiter' pepper (Capsicum annuum L.) seeds were sown in untreated styrofoam flats or in flats treated with 25, 50, 100, or 150 g/liter cupric hydroxide (Spin OutTM, Griffin Corp., Valdosta, Georgia U.S.A.). At 36 days after seeding (DAS), tomato stem and root lengths were reduced by all rates of cupric hydroxide. However, shoot and root dry weights were not affected. The remaining plants were transplanted to sand in the greenhouse and grown unstressed or drought-stressed for 15 days, with root and shoot dry weights collected at 3-day intervals to calculate relative growth rates (RGR). Shoot and root RGRs of tomato transplants were not affected by previous treatment with cupric hydroxide. At 42 DAS, shoot and root dry weights and root length of pepper transplants were reduced by all rates of cupric hydroxide. Shoot and root RGRs after transplanting to unstressed conditions were greatest in plants from flats treated with 50 or 100 g/liter cupric hydroxide. However, under stress conditions, only plants from flats treated with 100 or 150 g/liter had higher shoot and root RGRs than control plants. | |
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