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Evaluation of Flair 50 EC Herbicide for Weed Control in Rice Paddy Fields

Evaluation of Flair 50 EC Herbicide for Weed Control in Rice Paddy Fields. BY MWANGI.J; WANJOGU R.K, OWILLA B.P.O. Introduction. A round 80% of Kenya ’ s national rice production is from the national irrigation schemes controlled by NIB.

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Evaluation of Flair 50 EC Herbicide for Weed Control in Rice Paddy Fields

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  1. Evaluation of Flair 50 EC Herbicide for Weed Control in Rice Paddy Fields BY MWANGI.J; WANJOGU R.K, OWILLA B.P.O

  2. Introduction • Around 80% of Kenya’s national rice production is from the national irrigation schemes controlled by NIB. • Weed control is an important practice in crop production as weeds compete with crops for nutrients and soil moisture thereby affecting final yields realized. • It costs approximately Kshs 3,000/= for one hand weeding per acre. • Under the circumstances it is prudent to consider alternative ways for weed control in paddy fields • In Kenya use of herbicides for weed control in paddy fields is a relatively new phenomenon and very few products have so far been screened for efficacy OBJECTIVE: • Evaluate the efficacy of FLAIR 50 EC herbicide in weed control in rice fields

  3. Examples of common rice weeds Ludwigia adscendens Monochoria vaginalis Scirpusjuncoides(Bulrush) Leptochloa chinensis

  4. Methodology Rice Varieties: • V1 = Basmati 370, • V2 = BW 196, • V3 = IR2793, • V4 = ITA 310 Treatments • The trial had 5 treatments as follows: • Untreated control. • Recommended rates for Satunil herbicide • 1L/Ha Flair EC • 1.5L/Ha Flair EC • 2L/Ha Flair EC The treatments were sprayed 3-5 days after transplanting

  5. Methodology cont. • Data Collection • Ten (10) hills were randomly selected and the following data taken; • Weed count • Plant Height • Efficacy of weed control (weed count, identification of weeds controlled) Toxicity of herbicide on rice crop • Crop injury (Phytotoxicity) recorded on a scale of 0 – 5 where • 0= No Phytotoxicity • 1 = very slight Phytotoxicity (<5%) • 2 = Slight Phytotoxicity (5 – 10%) • 3 = Significant Phytotoxicity (10 – 20%) • 4 = Serious Phytotoxicity (>20% • 5 = Total burn-down of crop Data was collected at 5thday after application and at interval of 5days after application for six times • Yieldfrom 5M2, at 14% MC Yield Components • Number of tillers/hill • Number of productive tillers/hill • Number of grains/panicle • Number of empty grains/panicle • 1000 grain weight (at 14% MC) • Milling quality

  6. Results for variety IR2793 Growth data Season 1

  7. Season 2

  8. Effect on weed count Season 1

  9. Season 2

  10. Effect on yield Season 1 Season 2

  11. Conclusion • From the results; • Plots that were not sprayed with any chemical had significantly lower number of tillers. • The number of most of the weeds were significantly and consistently low in satunil and flair EC treated plots. • However in most of the cases, there were no significant differences on weed counts between the different concentration of flair EC as well as satunil. • Also plots treated with 1l/ha and 1.5l/ha of flair EC had significantly higher numbers of filled grains compared to Satunil and the control. • This clearly indicates that Flair EC is a potential effective herbicide in rice farming.

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