Evaluation of some botanicals against the maize weevil (Sitophilus zeamais Motsch.) on stored sorghum at Bako
1996
Adane Kasa | Abraham Tadese (IAR, Addis Abeba (Ethiopia))
Crude leaf and/or seed, flower powder of 17 plant species belonging to 13 families were compared with pirimiphos-methyl 2 percent dust and the untreated check for their toxicity to adult Sitophilus zeamais at Bako. Mixed wood-ash, maize cob-ash and cow dung were also included in the test. Except pyrethrum and pirimiphos-methyl, all botanicals, wood-ash, maize cob-ash and cow dung were tested by admixing 5 percent (W/W). Pyrethrum and pririmiphos-methyl were applied at the rate of 2 percent (W/W) and 10 ppm, respectively. The treatments were arranged in completely randomized design with four replication. Among the treatments, eight of them inflicted 58-88 percent mortality in the following order Phytolacca dodecandra leaf powder (58 percent) less than Datura stramonium leaf powder (61 percent) less than Nerium oleander leaf powder equal two Phytolacca dodecandra seed powder = pirimiphos-methyl = mixed wood ash (66-72 percent) less than pyrethrum flower powder (88 percent). Three plant products caused less than 30 percent and eighteen of them between 31 and 50 percent mortality. Significantly lower numbers of progeny were recorded in pyrethrum flower powder, mixed wood-ash and pirimiphos-methyl treated grains followed by Phytollacca dodecandra seed powder within four months of storage period. Number of progeny emerged on the remaining treatments ranged between 184-763 and were not significantly different from the control. Seed germination was not affected by any of the treatments. This study showed the potential of some botanical plants for the control of S.zeamais on sorghum.
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Эту запись предоставил Ethiopian Institute of Agricultural Research
