Infestation Outbreak of the African sugarcane stalk borer Eldana saccharina W. (Lepidoptera: Pyralidae) in Sugarcane Plantations of Northern Ivory Coast: Management Strategies Under Implementation

Péné, Crépin B.; Boua, Mélanie; Coulibaly-Ouattara, Yah; Goebel, François-Régis

doi:10.37247/pabsc.1.2020.15

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“…N-rates in this experiment were applied at once in line of findings obtained under Ferké farming conditions where two applications of N-fertilizer at planting and tillering stage did not significantly influence cane and sugar yields compared with a single application (Péné et al, 2018;Péné and Koulibaly, 2011). In contrast, in other sugarcane producing areas like under mineral soils of southern Florida (FL, USA) under very low organic matter content, nitrogen must be supplied in split fertilizer applications (Mabry McCray et al, 2017).…”

Section: Nitrogen Rates and Timingmentioning

confidence: 58%

“…Prior to heavy borer damage observed at harvest in Ferké 1 sugar estate over 2015-16 cropping season with on average 6.7% BIN, the pest incidence although maintained below the tolerable threshold (5 % BIN) was much more endemic in Ferké 1 with on average 2.6 to 4.5% BIN compared to 0.9 to 2% in Ferké 2 (Péné et al, 2018). In Ferké 2, the threshold was outreached in 2016-17 with 5.6% BIN on average.…”

Section: Introductionmentioning

confidence: 90%

“…Different studies on both main sugarcane stem borers showed their relative susceptibility to local agroecological conditions, including farming practices (Péné et al, 2018;Goebel et al, 2010;Parra et al, 2010;Do Thi Khanh et al, 2012;Nikpay et al, 2014;Goebel et al, 2018). The regional workshop for west and central Africa on stem borer management held on late march 2018 in Ferké (Ivory Coast) allowed to sensitize main actors from height sugar companies on the relevance of implementing an integrated approach to effectively achieve that goal.…”

Section: Towards An Integrated Stem Borer Management Strategymentioning

confidence: 99%

“…This was partly due to limitations in nitrogen fertilizer rates implemented in 2016-17 by 25-30%, i.e. on average 115 kg N/ha under irrigation instead of 160 kg/ha or even 250 kg/ha applied over 2014-15 and 2015-16 cropping seasons (Péné et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Sugarcane yields, juice quality and stem borer (Eldana saccharina W) infestations as influenced by increasing nitrogen rates in Ferké, Northern Ivory Coast

Coulibaly-Ouattara¹

2019

J. Agric. Crop Res

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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 Ferké 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 Ferké 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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Section: Nitrogen Rates and Timingmentioning

confidence: 58%

Section: Introductionmentioning

confidence: 90%