Incidence, Distribution and Characteristics of Major Tomato Leaf ...
Incidence, Distribution and Characteristics of Major Tomato Leaf ... Incidence, Distribution and Characteristics of Major Tomato Leaf ...
Incidence, distribution and characteristics of major tomato leaf curl and mosaic virus diseases 182 leafhoppers (Circulifer tenellus). Thrips were most numerous, and most common, especially where respondent farmers used insecticides (Table A.3.3 and A.3.4). Considering vector occurrence, whiteflies were found mostly on young vegetatively vigorous tomato plants; whereas white thrips, aphids and leafhoppers were observed at all tomato growth stages. In Mpigi district, aphid populations were not observed in the fields visited whereas whiteflies and thrips were found in all fields. In contrast, in Mbarara district whiteflies occurred in only 20% of fields visited, whereas no aphids or leafhoppers were observed in the field. Thrips were, however, found in every field visited. In Kasese district all four types of insect pests occurred, i.e. whiteflies, aphids, thrips and leafhopper. Pesticides were used on tomato in all districts with their lowest use being in Mukono and Rakai districts, where 75% and 60% of farmers applied pesticides, respectively. A wide range of pesticides was used. These were Rogor (Dimethoate), Dursban, Fenom P. Ambush (Pyrethroid), Dimecron (Phosphamidon), and Sumithion (Fenitrothion) (Table A.3.4).
Incidence, distribution and characteristics of major tomato leaf curl and mosaic virus diseases 183 Table A.3.1: Percentage number of respondents (10 or more respondents per district) applying various agronomic practices per district surveyed. Agronomic practices included use of indigenous (traditional) varieties, seed extraction, rotation, intercropping, irrigation, staking, pruning, uprooting, and mulching District Indigenous variety Farmer seed extraction Rotation Intercropping Irrigation Staking Prunning Uprooting Mulching Rakai 100 100 100 80 0 0 20 20 80 Mbale 0 20 100 20 0 100 100 0 0 Iganga 0 40 100 20 0 0 40 0 80 Mpigi 80 100 100 60 0 0 60 0 60 Mukono 20 20 80 0 0 0 20 0 40 Mbarar 0 80 80 20 0 0 80 0 0 Kasese 0 40 100 20 60 80 80 0 0 Mean 29 57 94 31 9 26 57 3 37
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<strong>Incidence</strong>, distribution <strong>and</strong> characteristics <strong>of</strong> major tomato leaf curl <strong>and</strong> mosaic virus diseases 183<br />
Table A.3.1: Percentage number <strong>of</strong> respondents (10 or more respondents per district) applying various agronomic practices per<br />
district surveyed. Agronomic practices included use <strong>of</strong> indigenous (traditional) varieties, seed extraction, rotation, intercropping,<br />
irrigation, staking, pruning, uprooting, <strong>and</strong> mulching<br />
District Indigenous variety Farmer seed extraction Rotation Intercropping Irrigation Staking Prunning Uprooting Mulching<br />
Rakai 100 100 100 80 0 0 20 20 80<br />
Mbale 0 20 100 20 0 100 100 0 0<br />
Iganga 0 40 100 20 0 0 40 0 80<br />
Mpigi 80 100 100 60 0 0 60 0 60<br />
Mukono 20 20 80 0 0 0 20 0 40<br />
Mbarar 0 80 80 20 0 0 80 0 0<br />
Kasese 0 40 100 20 60 80 80 0 0<br />
Mean 29 57 94 31 9 26 57 3 37
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