Effect of grafting on yield of commercial tomato cultivars grown under bacterial wilt (Ralstonia solanacearum) infested soil

Kitundu, J.A.; Dinssa, Fekadu F.; Manickam, Ravishankar; Macharia, Joseph Kinyoro; Mbwambo, Omary; Aloyce, A.; Sasikala, R.

doi:10.17660/th2022/001

Cited by 1 publication

(1 citation statement)

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“…The yield potential of tomatoes in this region may not be similar due to other pressures like leaf diseases such as early and late blights, which limits the production potential. Less wilting and higher yields with 'Tanya' tomatoes grafted onto 'Hawaii 7996' grown in soil infested by bacterial wilt have also been previously reported at one of the experimental sites (Arusha) used in the present study [32]. The lower performances of the grafted plants in the present study may be explained by a higher incidence of bacterial wilt in our study conditions, like the marked differences in wilting and yields between seasons in Moshi on grafted plants (Figure 3E,F).…”

Section: Discussionsupporting

confidence: 82%

Boosting Tomato Resilience in Tanzania: Grafting to Combat Bacterial Wilt and Abiotic Stress

Msabila,

Nordey,

Ernest

et al. 2024

Horticulturae

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The grafting technique has successfully mitigated crop losses from diseases and stress in vegetable production; however, vegetable grafting in Tanzania is very limited. Field and greenhouse experiments conducted in Tanzania’s mainland and islands compared the response of tomato determinate cv. ‘Tanya’ to production challenges when ungrafted and grafted onto five tomato rootstocks (‘Hawaii 7796’, ‘Tengeru 1997’, ‘Tengeru 2010’, ‘R3034’, and ‘Shelter’), one eggplant variety (‘EG 203’), and one wild Solanum species (Solanum elaeagnifolium). The visual symptoms of bacterial wilt varied significantly with location and season, ranging from 8 to 100%, attributed to varying bacterial wilt pressures and strains of Ralstonia solanacearum isolated (Phylotype I sequevars 17, 18, and 31). ‘EG203’ and ‘Hawaii 7796’ emerged as the most effective rootstocks, reducing wilting by 49.8 and 51.0% and improving yield by 57.2% and 27.7% on average across experiments conducted in three locations (Moshi, Pemba, and Unguja) over two seasons. Combining reduced water supply with grafting resulted in an average reduction in wilting of 76%, while also boosting yields by an average of 3.6 times in experiments conducted in Arusha over two seasons. Grafting onto ‘Hawaii 7796’ and ‘Shelter’ significantly improved ‘Tanya’ yields by 38.3% and 41.6% on average over two seasons, only under standard nutrient application rates. While certain rootstocks improved crop performance, yields across various sites and seasons were significantly hampered by pest pressure. These findings support grafting’s potential to mitigate damage from common stresses, emphasizing the need for further research to identify suitable rootstocks for optimizing returns on investments in grafted plants in Tanzania.

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Section: Discussionsupporting

confidence: 82%