ISHS Acta Horticulturae 218: XII African Symposium on Horticultural Crops
CONTROL OF NEMATODES AND OTHER SOIL BORNE PESTS AND DISEASES OF FRENCH BEANS BY PHENAMIPHOS AND CARBOFURAN |
| Author: | L.J. Ogallo |
| Abstract:
A field which was naturally infested with root-knot nematodes, Meloidogyne spp., white grubs, Schizonycha spp. and wilt fungi, Rhizoctonia and Fusarium spp. was treated with phenamiphos (Nemacur) at 7 5 kg ka-1, a.i. or carbofuran (Furadan) at 4 kg ha-1, a.i. and then planted with french beans cv. 'Monel'. Plant stand counts at the start of flowering were 83, 92 and 66% of the seed-rate, on the phenamiphos, carbofuran and untreated control plots, respectively. The population density of Meloidogyne spp. increased 30-fold on the untreated plots and 20-fold on either of the treated plots, three months after planting. The nematodes caused slight root galls (index = 1) on the treated plots and moderate root galls (index = 2) on the untreated ones. Crop yields were 43 0 kg/plot (10.8 t ha-1), 43.7 kg/plot (10.9 t ha-1) and 28 9 kg/plot (7.2 t ha-1) of fresh pods on the phenamiphos, carbofuran and untreated plots, respectively. Yields per plant were, however, not significantly different (P = 0.05) among the three treatments, and averaged 68 g/plant. It can be concluded that the application of either phenamiphos or carbofuran on plots of french beans cv. 'Monel' resulted in significantly higher emergence and survival percentages of seedlings and increased yield of pods relative to the untreated plots. | |
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