POSTERS: Chemical control
Effect of foliar spray with Eucalyptus extracts on disease incidence and yield loss to spot blotch in Wheat Bhakkar 2001 under green house condition
Khalida Bahadar - PARC Institute of Advanced Studies in Agriculture. Shahzad Asad- PARC Institute of Advanced Studies in Agriculture, Anjum Munir- PARC Institute of Advanced Studies in Agriculture
The efficacy of foliar spray with flowering buds of Eucalyptus camaldulensis and Eucalyptus torelliana extracts on the yield performance of wheat (Bhakkar 2001) artificially infected by Bipolaris sorokiniana was evaluated in green house. The foliar aerosol of 3 crude extract at 1, 5 and 10% concentrations were applied under 3 schedules. Untreated and unsprayed controls were also managed. The morphological study after treatments applications reveals that the plants height and leaves length/width decline as the severity of disease rises. The negative relationships were found between disease severity, number of grains/spike and 1000 grains weight. Maximum decline in number of grains/spike (16-20) was recorded in unsprayed control. Treatment of E. torelliana significantly increased plant population, grain yield and grain weight, but did not found effective in minimizing black point incidence. Alternatively, foliar sprays with E. camaldulensis ethanol ingredients, under all the spray schedules except spray III schedule significantly minimized the disease severity. Among the different spray schedules, spray I schedule with a 10 days gawk spraying at 15, 25, 35, 45 and 55 DAI appeared to be most effective, that was statistically comparable to spray II plan with a 15 days gawk spraying at 15,30,45 and 60 DAI in reducing black point incidence and increasing yield quantity. From economical point of view spray II schedule that including four squirt applications was found best accompanied by Spray III schedule that made up of only three spray applications applied at 15, 35 and 55 DAI.