Impact of Weather on Sigatoka Leaf Spot of Banana (&lt;i&gt;Musa&lt;/i&gt; spp. L.) and its  Ecofriendly Management

Khan, M. A.; Hossain, Ismail; Ahmad, Masum

doi:10.3329/agric.v13i2.26587

Cited by 9 publications

(13 citation statements)

References 11 publications

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“…Rainfall appeared to have little or no impact on disease severity, contradictory to studies that reported that leaf wetness was critical for P. fijiensis spore germination, symptom development and disease severity [49,50]. Our observations suggest that conidia, whose germination is not affected by leaf wetness [50], is the main source of inoculum and played an important role in the spread and severity of black Sigatoka in this study.…”

Section: Discussioncontrasting

confidence: 96%

“…High RH is important in conidia formation. Conidia serves to initiate multiple reinfections during the growing season, increasing the number and size of lesions while maximum temperature influences the lesion formation, expansion and rate of leaf necrosis [50]. Rainfall appeared to have little or no impact on disease severity, contradictory to studies that reported that leaf wetness was critical for P. fijiensis spore germination, symptom development and disease severity [49,50].…”

Section: Discussionmentioning

confidence: 96%

“…Conidia serves to initiate multiple reinfections during the growing season, increasing the number and size of lesions while maximum temperature influences the lesion formation, expansion and rate of leaf necrosis [50]. Rainfall appeared to have little or no impact on disease severity, contradictory to studies that reported that leaf wetness was critical for P. fijiensis spore germination, symptom development and disease severity [49,50]. Our observations suggest that conidia, whose germination is not affected by leaf wetness [50], is the main source of inoculum and played an important role in the spread and severity of black Sigatoka in this study.…”

Section: Discussionmentioning

confidence: 99%

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Genotype X Environment Response of ‘Matooke’ Hybrids (Naritas) to Pseudocercospora fijiensis, the Cause of Black Sigatoka in Banana

Kimunye

Jomanga

Tazuba³

et al. 2021

Agronomy

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Growing bananas resistant to Pseudocercospora fijiensis, the cause of black Sigatoka, is the preferred disease control strategy for resource-poor farmers. Banana breeding programs in east Africa have developed 27 Matooke hybrids (commonly known as NARITAs) with higher yields than local landraces. To assess the response of NARITA hybrids to P. fijiensis, 22 hybrids were evaluated under natural field conditions in four locations—Kawanda and Mbarara in Uganda, and Maruku, and Mitarula in Tanzania—between 2016 and 2018 for three crop cycles. Black Sigatoka was visually assessed and the area under the disease progress curve calculated for each plant over time. Significant differences (p < 0.001) were observed between genotypes, environments, and their interaction. The highest contributor to black Sigatoka severity (39.1%) was the environment, followed by the genotype (37.5%) and the genotype Χ environment interaction (GEI) (23.4%). NARITA 2, 7, 14, 21 and 23 were resistant and the most stable hybrids across locations. If other attributes such as the yield and taste are acceptable to end-users, these hybrids can be released to farmers in the region to replace highly susceptible landraces. Mitarula was identified as an ideal site for evaluating banana against black Sigatoka and should be used as a representative location to minimize costs of disease evaluations.

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Section: Discussioncontrasting

confidence: 96%

Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

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Genotype X Environment Response of ‘Matooke’ Hybrids (Naritas) to Pseudocercospora fijiensis, the Cause of Black Sigatoka in Banana

Kimunye

Jomanga

Tazuba³

et al. 2021

Agronomy

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“…In the coastal region of Ecuador there are small variations in temperature and luminosity from one season to the rest, but precipitations are concentrated in the winter period (usually from January to May). The rain and humidity of the winter season favor the spread of Sigatoka Negra across the banana trees (Jesus Júnior et al, 2008;Khan et al, 2015) and for this reason producers intensify fumigations in this period. 8 Figure 1 shows aerial fumigations in the provinces where most of the banana plantations in the country are concentrated.…”

Section: Plantations and Aerial Fumigationmentioning

confidence: 99%

The Hidden Cost of Bananas: Pesticide Effects on Newborns’ Health

Calzada

Gisbert

2021

SSRN Journal

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We study the effects of aerial fumigation of banana plantations on newborns' birth weight during the period 2015-2017 in Ecuador. We use mothers' addresses and information on the perimeter of the plantations to create an individual measure of newborns' exposure to pesticides. We use this measure to implement three independent identification strategies to address the endogeneity of exposure to aerial fumigations. First, we consider a difference-indifferences strategy that exploits seasonal variations in the use of pesticides across provinces.Second, we estimate a difference-in-differences model that considers geographical variations in the use of pesticides across comparable crops. Third, and finally, we estimate a maternal fixed effects model to examine the effect of pesticides on siblings who had a different residence during gestation and who were exposed to different levels of fumigations. Our first empirical model shows that newborns exposed to pesticides, when their first gestational trimester coincides with the periods of intensive fumigations of the plantations, have a birth weight reduction of between 38 and 89 grams. Moreover, exposure to pesticides increases the likelihood of low birth weight and low Apgar score at the first minute by around 0.35 and 0.33, respectively. The second model finds that newborns exposed to fumigated banana plantations have a birth weight deficit of between 29 and 76 grams, when compared to those exposed to other fumigated crops. Finally, the maternal fixed effect model shows that girl newborns exposed to pesticides have a birth weight deficit of 346 grams when compared to non-exposed siblings.

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“…Bananas (Musa spp. L.) are monocotyledonous plants that belong to the family Musaceae and it is one of the most important fruits in the world and is widely grown in the tropical and sub-tropical countries the genus Musa originated in Southeast Asia (Khan et. al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Effect of Bion and Amistar in inducing resistance against Cercospora leaf spot of banana

Akter

Mejan

Akter

et al. 2018

J Bangladesh Agric Univ

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Bion (benzothiadiazole) and Amistar (azoxystrobin) were applied for controlling Cercospora leaf spot of banana variety Amrita Sagarin at the field laboratory, Department of Plant Pathology, Bangladesh Agricultural University (BAU), Mymensingh by applying different treatments viz. dipping bottom of sucker for 6 hrs. in Bion (0.005%) before planting, dipping bottom of sucker for 6 hrs. in Bion (0.01%) before planting, spraying of Bion @ 0.005% once on leaves after 80 days of planting, spraying of Bion @ 0.01% once on leaves after 80 days of planting, spraying of Amistar @ 0.05% once on leaves after 80 days of planting, spraying of Amistar @ 0.05% only on leaves after 80 and 140 days of planting, spraying of Bion @ 0.005%) once on leaves and pseudostem after 80 days of planting, spraying of Bion @ 0.01% once on leaves and pseudostem after 80 days of planting and control (without chemical). From these above treatments it is revealed that dipping of bottom of banana sucker for 6 hrs. in Bion either @ 0.005% or 0.01% significantly reduced plant height, while Bion and Amistar did not exert any effect on number of leaf/ plant. Bion @ 0.005% and 0.01% (dipping of bottom of sucker before planting), Bion @ 0.01% (on leaves, 1 spray) and 0.01% (on leaves and pseudostem, 1 spray) and Amistar @ 0.05% (on leaves, 2 spray) showed significant effect in reducing number of diseased leaf/ plant, number of diseased spot/ plant, percent leaf area (cm2) diseased/ plant, mean spot size (mm2)/ plant of banana var. Amrita sagar. J.Bangladesh Agril. Univ. 16(3): 380–385, December 2018

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Impact of Weather on Sigatoka Leaf Spot of Banana (<i>Musa</i> spp. L.) and its Ecofriendly Management

Cited by 9 publications

References 11 publications

Genotype X Environment Response of ‘Matooke’ Hybrids (Naritas) to Pseudocercospora fijiensis, the Cause of Black Sigatoka in Banana

Genotype X Environment Response of ‘Matooke’ Hybrids (Naritas) to Pseudocercospora fijiensis, the Cause of Black Sigatoka in Banana

The Hidden Cost of Bananas: Pesticide Effects on Newborns’ Health

Effect of Bion and Amistar in inducing resistance against Cercospora leaf spot of banana

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