Browsing by Author "Nyiira, Z. M."
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Item An Evaluation of Five Insecticides for Use against Pests of Cowpeas (Vigna Unguiculata(1973) Nyiira, Z. M.; Mehta, P. N.Five insecticides, fenitrothion, carbaryl, lindane, malathion and dimethoa te were evaluated against the }Jests of two promisin!; varieties, Emma and Iran grey, of cowpea Viglla lInglliculata (L. Walp). Highest yields, (9,437 amd 10,737 ikg/iha, var. Iran grey and Emma respectively) of green mature pods in both varieties were obtained by spraying fenitrothion. Lindane gave the second highest yield although not significantly higher than carbaryl. The increase is mainly attributed to the increase in number of pods per plant and decrease in pod and seed damage by Maruca testulalis Geyer, a major pest. Insect pests cf varying economic importance on cowpea plant at the Makerere University Farm near Kampala are listed.Item An evaluation of five insecticides for use against pests of cwpeas (Vigna Unguiculata(L.) Walp.) with wpecial reference to green pod yield(1973) Mehta, P. N.; Nyiira, Z. M.; Makerere UniversityFive insecticides, fenitrothion, carbaryl, lindane, malathion and dimethoa te were evaluated against the }Jests of two promisin!; varieties, Emma and Iran grey, of cowpea Viglla lInglliculata (L. Walp). Highest yields, (9,437 and 10,737 ikg/iha, var. Iran grey and Emma respectively) of green mature pods in both varieties were obtained by spraying fenitrothion. Lindane gave the second highest yield although not significantly higher than carbaryl. The increase is mainly attributed to the increase in number of pods per plant and decrease in pod and seed damage by Maruca testulalis Geyer, a major pest. Insect pests cf varying economic importance on cowpea plant at the Makerere University Farm near Kampala are listed.Item Infestation of cereals and pulses in the field by stored products insects and two new records of stored products coleoptera in Uganda(1970) Nyiira, Z. M.Some crops are known to be infested by insects associated with stored produce while still in the field. In Uganda, maize and beans are infested by Sitophilus Oryzae or S. zeamais and Acanthoscelides obtectus respectively, in the field. Samples of sorghum (Sorghum vulgare), maize (Zea mays), beans (Phaseolus vulgaris, Pigeon peas (Cajanus cajan) and grams (Phaseolus spp) collected from the filed and incubated in the laboratory, contained 18 spices of insects associated with stored products. Except for the one moth all of these were beetles. During inspection of stores and mills, two additional beetles species were recorded. These are Carcinopos quatiuordecimstriata (Stephens) (Histeridae) and Lyprops badius Hopes (tenebrionidae). An unidentified bruchid which resembled Acanthoscelides obtecurs was found to be common on sorghum in the field.Item Pest Status of Thrips and Lepidopterous Species on Vegetables in Uganda(1973/1974) Nyiira, Z. M.During a survey carried out between October 1970amd JUlly 1971, six species of Thysa, noptera and 38 of Lepidoptera were recorded as pests of vegetables in Uganda. Their economic status and hosts are described. The majority and economically important specieswere Lepidoptera belonging to the families, N octuidae, Pyralidae and Plutellidae. Thrips were Lepida'Poom belonging Ito It!he famiJ,ies, on onions and lliomaltoes.
