Effect Of Some Growth Regulators And Water Regime On The Growth, Fruit Yield And Ingredients In Capsicum:

Hend El-sayed Wahba Abd El Hady

This investigation Elimed the increase of fruityield and capsaicin contlent by studying the effectsof water regimes and chemical cytokinens spraying ongrowth. fruiting and chemical composition of CapsicumaIUlUum L.T,h.eexperiments were carried out during two successiveyears of 1981 and 1982 at the Experimental Station,Faculty of Agriculture at Moshtohor. Zagazig University.In a split plot design 6 water reg~es involvingquantity of water and water supply intervalS were inthe main plots. The sub-plots treatments included theapplication of two growth regulators namely (PBA) (6(benzylamino)9(2-tetranyDROPyronyl) 9.H purine) and NPA(6(benzylamino)9(2-tetrahyDROPyranyl)4H nicotinamide).The most important results are :1. The minimum amount of water supply produced thehighest number of branches on pepper plants.2. Maximum amount of watering at 5-day interval gavethe least number of branches.3. Water stress due to longer intervals of irrigationserioUSly decreased the number of fruits carried onthe plant.4. Adequate and high amounts of water supply significantlyincreased fruiting.5. Moderate amounts of water. at snort intervals as 5-da.yseconomically produced a good crop in both number andfresh weight.6. Decreasing water supply may increase the fresh weightsof vegetative organs but fruiting was seriously decreased.7. The highest percentage of dry matter of fruits wascorncided with irrigation every 10 days.8. Spraying PBA at 100 ppm increased the number of branchesespecially those subjected to drougbt conditions.9. Application of FBA increased fruit-set and freshweigh t of fruits.10. The application of FBA may improved the flower andfruit DROP in crops grown under drought conditions.11. NFA at the proposed concentrations baS deterioratingeffects on fruit-set of pepper.12. Pepper plants can be grown under moderate amountsof water as 4)00 Y)/feddan and sprayed by 100 ppmof PBA for better yield.1). Shortage of water supply as (quantity or loneerintervals of irrigation increased capsaicin ingredientin fruits of pepper.14. PBA at 100 ppm generally increased capsaicin contentexcept with plants subjected to long intervals ofirrigation.15. PBA may be applied to increase capsaicin in fruits ofplant grown under high or moderate water regimes.16. The concentration of PBA as 200 ppm decreased capsaicinin pepper fruits by 82 % for plants grown under longintervals of irrigation.17. NPA increased the capsaicin only with plants grownunder frequent and abundant water supply18. Carbohydrate percentages were high in leaves of plantsgrow under moderate amounts of water, and increased byPHA ~pplication.19. Treatment (A) with 200 ppm of PEA or NPA increased thepercentages of (a) and (b) chlorophyll.