Effect of bio-regulators on performance of tomato under naturally ventilated polyhouse during off-season

Tomato is a universally accepted vegetable crop popular throughout the world for its high pro vitamin A and vitamin C contents, which provides an array of processed products like juice, soup, puree, paste, ketchup etc. To determine the effect of bio-regulators on growth, flowering, fruit set and yield of tomato (var. Arka Alok) inside naturally ventilated polyhouse during off-season, a field experiment was conducted during 2005–06 at the Department of Horticulture. The study revealed that application of 25 ppm GA₃ at the time of flowering and 15 days after first application produced highest fruit yield per plant per m² during July (5.79) and August (4.84) respectively.