Efficacy and environmental impact of flocoumafen (Storm) wax block baits used for rice field rat control in the Philippines
1988
Hoque, M.M. | Olvida, J.L. (Philippines Univ., Los Banos, College, Laguna (Philippines). National Crop Protection Center)
Two large (approx. 160 ha) trial sites which included ricefields and village housing were selected in Laguna, Philippines. Flocoumafen 3.5 g wax block baits (Storm) were applied to one site, initially as two areawide pulses of 80 to 100 blocks/ha and later as spot treatments to areas of particularly high rat infestation. Baiting in and around the village houses was already carried out during the first two applications. On average, only 1.175 kg/ha/season of flocoumafen block bait gave good rodent control resulting in significant decreases in crop damaged (% cut tillers) compared to the untreated area. The overall yield increase was estimated to be 13 tons of grain, equivalent to total added benefit of P39,000 (approx. US$1,950) or P253 (approx. US$13) per ha. Few domestic animals were attracted to the bait and no casualties were reported. With the exception of two shrews (Suncus sp) all animal carcasses found were those of the target rodent pests. Flocoumafen gave excellent rat control with no observable effects on non-target animals.
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