Chemical control of branched broomrape ( Orobanche ramosa) in glasshouse grown tomato

• Published in: Crop protection Vol. 17; no. 8; pp. 625 - 630
• Main Author: Qasem, J.R.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-11-1998
• Subjects: application times; chlorsulfuron; herbicides; Orobanche ramosa; chlorsulfuron; application times; Orobanche ramosa; herbicides
• ISSN: 0261-2194; 1873-6904
• DOI: 10.1016/S0261-2194(98)00062-3

The effect of different soil applied herbicides on germination and growth of branched broomrape (
Orobanche ramosa L.) in tomato was evaluated through glasshouse experiments. Chlorsulfuron, pronamide and pendimethalin effectively controlled the parasite, with chlorsulfuron giving the best weed control and the least harmful effect on tomato plants. At 2.44 g a.i. ha
−1, chlorsulfuron completely prevented parasite infestation when thoroughly mixed with the soil prior to transplanting. Low doses down to 0.61 g a.i. ha
−1 were effective against the parasite and less injurious to tomato plants, but poorer
Orobanche control was found, although infestation was significantly reduced. Pre-plant application of chlorsulfuron at 9.75 g a.i. ha
−1 or higher doses, was highly toxic and tomato exhibited severe growth reduction. A single application of chlorsulfuron (9.75 g a.i. ha
−1) with irrigation water at 3–4 weeks after emergence, or weekly application of the same dose for 4–6 weeks after emergence gave excellent results. All doses of the herbicide reduced
Orobanche infestation, with 4.88 and 2.44 g a.i. ha
−1 the best for
Orobanche control and the tomato plants.