Furthermore, bound water and proline content in leaves, as well as the dry matter and starch content percentage in tubers, increased with decreasing irrigation levels.Īs a direct link between farmers and manufacturers of technologies, the characteristics and activities of input suppliers can be expected to play an important role in the generation and diffusion of innovations in agricultural systems. were the most drought-tolerant cultivars, with 75 and 50 % ET, respectively, whereas Spunta cv. In terms of the interaction between potato varieties and irrigation levels, Diamant and Arizona cv. Concerning potato varieties, Diamant in both growing seasons gave the highest values for most growth measurements, tuber yield and its components as well as, some parameters of growth analysis, physical and chemical characters and water use efficiency (WUE), followed by the Arizona variety. While there were increased bound water and proline content in leaves as well as dry matter and starch content percentages in tubers under drought conditions. Different traits of vegetative growth, some chemical characters and yield were increased with increasing irrigation levels from 50 to 100% of ET for all tested varieties. The irrigation levels were 100, 75 and 50% of evapotranspiration (ET). The current investigation was conducted to test the response of five potato varieties i.e., Arizona, Diamant, Markies, Spunta and Valor, to different irrigation levels during the summer seasons of 20 under Egyptian conditions.
Elgon zone is higher in the second season, with the small seed plot technology being favourable for small land holdings than conventional potato planting. The results demonstrated that potato productivity in the Mt. Principal component analysis revealed that tuber numbers and potato tuber moth damage was more associated with environment in Kween. Though bacterial wilt and late blight incidence was not significantly different in the two seasons, infected tubers for both pathogens were more in Manafwa and Sironko for bacterial wilt, and Bududa and Kapchorwa for late blight. Number of tubers with bacterial wilt were higher in conventional potato planting than the small seed plots, with Manafwa and Sironko registering the highest incidence. Number of tubers were more in small seed plots than conventional potato planting with significant effects (P < 0.05) in Bududa and Kapchorwa. However, Bududa district has potential to achieve relatively higher potato yield in both seasons. Results showed higher potato yield in Kapchorwa and Kween in the second season compared to the other districts. On-farm trials were conducted in Bududa, Sironko, Manafwa, Kapchorwa and Kween districts in the first and second seasons of 2011. This study was conducted to determine the effect of seasons and the small seed plot technology in enhancing seed potato production in the Mt. Consequently, yield hardly exceeds 2.9 t ha-1 yet a potential of 10 t ha-1 can be realised.
Elgon zone of Uganda is constrained by seasonal variations, lack of clean seed and the challenges of pests and diseases.
For an effective contribution to innovation the mandate of research needs to allow for the active engagement in training, communication and scaling-up. The experience shows that it is worthwhile to search for opportunities for incremental innovation and that these can be of a surprising simple nature. When looking back an essential success factor of the research trajectory was the researchers' room to manoeuvre and immerse in partnerships with practitioners, while innovation was made the central objective, rather than research results. Here it is shown that positive selection, the selection of healthy looking mother plants for the production of seed potatoes by ware potato farmers, can contribute to improving seed potato quality. Seed potato system interventions need to address the quality of specially multiplied and farm-saved seed potatoes simultaneously. This often makes economic sense in the absence of affordable high quality seed potatoes and limited market security. Few seed potatoes are currently sourced from specialized multipliers, as farmers largely rely on farm-saved seed potatoes. Improving the quality of seed potatoes can contribute to increasing its productivity. The potato (Solanum tuberosum L.) has a high potential to raise smallholder income and improve food security in Eastern Africa.
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