Abstract
A greenhouse experiment was conducted to evaluate effect of some soilamendments, i.e; fresh chopped leaves or dry leaves powder of Datura stramonium,Peganum harmala or Tagetes minuta, poultry and sheep manure in controlling thestem and bulb nematode, Ditylenchus dipsaci on garlic (Allium sativum) ascompared to the nematicide, Vydate® (Oxamyl). All applied treatments significantly(P≤ 0.05) reduced final population of D. dipsaci except in treatment of sheepmanure at lowest dosage rate, which significantly increased the population incomparison to that of the check. Efficacy of the treatments differed according to thetype of organic soil amendment, dosage rate and type of application. Dry leavespowder of Peganum harmala was the most effective in reducing nematode counts insoil and garlic bulbs at the different rates, followed by fresh chopped leaves ofDatura stramonium and T. minuta while, the lowest % reduction in such nematodeparameters was recorded in case of soil amended with sheep manure followed bydry leaves powder of Datura stramonium. As for plant growth criteria the resultsreveal that most tested materials improved plant growth criteria of shoot, root andbulb compared to the untreated controls.
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