Nematicidal Activity of Plant Extracts against the Root-Knot Nematode Meloidogyne Sp on Tomato Plants

Pots experiment of tomato plants was conducted in Directorate of Diyala Agriculture, plant pathology Lab during 2016 , nematicidal activities of aqueous extracts from plants viz., Garlic, Ginger , Castor bean , Nerium and Eucalyptus were assayed against root knot nematode Meloidogyne sp. The results showed that nematicide (Oxymethoed LS) and Castor bean recorded maximum shoot weight of plants (10.6 and 9.0 g) respectively while root weight was increas­ed in treatments of Oxymethoed and ginger (2.45 and 1.5 g) respectively after control treatment (l7.53 g) whereas Oxymethoed and Nerium reduced number of juveniles/pot (0.0,80) respectively. Keywords: Meloidogyne sp, Garlic, Ginger, Castor bean, Nerium, Eucalyptus and Oxymethoed L

Allelopathic effects for three plants extracts on weeds of wheat (Triticum aestivum L.)

An investigation was carried out to evaluate the allelopathic effects of aqueous extracts of Eucalyptus obligo, Chrysanthemum indicum and Eruca sativa on weeds of wheat in the research field of Kanan region, province of Diyala, Iraq during 2016-2017. A minimum number of weeds and Dry weight of weeds were significantly recorded (3.3 m-2, 15 g) respectively in Eruca sativa extract while maximum control of weeds % and inhibition of weeds % (71.2, 87.5%) were significantly recorded in Eruca sativa extract. Different yield components of wheat, such as crop height and 1000-grain weight showed maximum significantly difference 109.0 cm and 42.9 g respectively in Eucalyptus obligo whereas spike length, number of grains / spike, number of plants / m2 and grain yield revealed maximum significantly difference 11.8 cm, 52.6, 341and 1568 g respectively in Chrysanthemum indicum