Abstract
Sugarcane is an important cash crop in Ivory Coast with a total production of about 2 million tons of cane/annum and 200,000 tons of sugar/annum. It contributes to about 1.2% of total country DGP and 3.3% of agricultural GDP. However, stem borer (Eldana saccharina W) infestations in Ferk sugarcane plantations have significantly impacted both cane and sugar yields over the last three cropping seasons with total sugar losses estimated to 5,000 tons in 2016-17. That pest damage outbreak was hypothesized to be linked to higher fertilizer rates applied to sugarcane plantations over 2014-15 and 2015-16 cropping seasons. The study aimed to determine the optimum Nfertilizer rate in sugarcane that could maintain stem borer infestations under control (BIN 5%). It was carried out on a commercial plantation of Ferk 2 sugar mill in northern Ivory Coast. That field which was cultivated with SP70-1006 variety was sprinkler irrigated with a center pivot and the experimental design was a randomized complete block with 11 N-fertilizer rates in four replications. Results obtained over two successive cropping seasons showed that, in plant cane, yield performance, cane juice quality and stem borer infestations were not significantly influenced by fertilizer treatments indicating that nitrogen was not a limiting factor in the soil profile to crop growth and development probably due to the decay of organic matter as a result of soil tillage. In contrast, in first ratoon, cane yields and stem borer infestations in terms of per cent of bored cane and bored internode percentage were significantly influenced by N-fertilizer treatments with an optimum rate of 100 to 110 kg N/ha. Cane yield increase resulting from additional N-fertilizer applications to that optimum rate was very little compared to the return cost of fertilizer with higher levels of stem borer infestations (> 8% BIN).
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Claims 6
Claim · model-written summary
In plant cane, nitrogen treatments did not significantly affect yield performance.
- Taxon
- Sugarcanet0
- Organ / stage
- plant canee0
- Treatment
- fertilizer treatmentse0
- Outcome
- yield performancee0
- Direction
- not significantly influencede0
Not reportedComparator
Verbatim
e0“in plant cane, yield performance, cane juice quality and stem borer infestations were not significantly influenced by fertilizer treatments”
t0“Sugarcane”
Claim · model-written summary
In plant cane, nitrogen treatments did not significantly affect cane juice quality.
- Taxon
- Sugarcanet0
- Organ / stage
- plant canee0
- Treatment
- fertilizer treatmentse0
- Outcome
- cane juice qualitye0
- Direction
- not significantly influencede0
Not reportedComparator
Verbatim
e0“in plant cane, yield performance, cane juice quality and stem borer infestations were not significantly influenced by fertilizer treatments”
t0“Sugarcane”
Claim · model-written summary
In plant cane, nitrogen treatments did not significantly affect stem borer infestations.
- Taxon
- Sugarcanet1
- Organ / stage
- plant canee0
- Treatment
- fertilizer treatmentse0
- Interactor
- stem borert0pest
- Outcome
- stem borer infestationse0
- Direction
- not significantly influencede0
Not reportedComparator
Verbatim
e0“in plant cane, yield performance, cane juice quality and stem borer infestations were not significantly influenced by fertilizer treatments”
t0“stem borer (Eldana saccharina W)”
t1“Sugarcane”
Claim · model-written summary
In first ratoon cane, nitrogen treatments significantly influenced cane yields, with an optimum rate of 100 to 110 kg N/ha.
- Taxon
- Sugarcanet0
- Organ / stage
- first ratoone0
- Treatment
- N-fertilizer treatmentse0
- Outcome
- cane yieldse0
- Value
- 100 to 110 kg N/hae0
Not reportedComparatorDirection
Verbatim
e0“in first ratoon, cane yields and stem borer infestations in terms of per cent of bored cane and bored internode percentage were significantly influenced by N-fertilizer treatments with an optimum rate of 100 to 110 kg N/ha”
t0“Sugarcane”
Claim · model-written summary
In first ratoon cane, nitrogen treatments significantly influenced percentages of bored cane and bored internodes.
- Taxon
- Sugarcanet0
- Organ / stage
- first ratoone0
- Treatment
- N-fertilizer treatmentse0
- Interactor
- stem borert0pest
- Outcome
- per cent of bored cane and bored internode percentagee0
Not reportedComparatorDirection
Verbatim
e0“in first ratoon, cane yields and stem borer infestations in terms of per cent of bored cane and bored internode percentage were significantly influenced by N-fertilizer treatments with an optimum rate of 100 to 110 kg N/ha”
t0“Sugarcane yields, juice quality and stem borer (Eldana saccharina W)”
Claim · model-written summary
Additional nitrogen above the optimum produced little cane yield increase relative to fertilizer cost, alongside higher borer infestation.
Verbatim
e0“Cane yield increase resulting from additional N-fertilizer applications to that optimum rate was very little compared to the return cost of fertilizer with higher levels of stem borer infestations (> 8% BIN).”
t0“Sugarcane yields, juice quality and stem borer (Eldana saccharina W)”
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