Cropprotection opportunities

Only a few studies have explored interference with plant-parasitic nematode behaviour as a crop-protection tool. These studies have examined co-formulation of the sex attractant, vanillic acid, with biological control agents in pots and in the field (Meyer and Huettel, 1996; Meyer et al., 1997) to manage the soybean cyst nematode Heterodera glycines, release of CO2 as a bait (Bernklau and Bjostad 1998a,b) to increase the efficacy of pelletized mycophagous fungi (Robinson and Jaffee, 1996), manipulation of CO2 and temperature gradients to increase Baermann funnel extraction efficiency (Robinson and Heald, 1989, 1991), application of lectins to block chemosensory function (Marban-Mendoza et al., 1987), shielding of plant roots with ammonium nitrate and other repellent fertilizer salts (Castro et al., 1991) and application of tannic acid attractants to the soil as confusants (Hewlett et al., 1997).

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