Cotton Production in Brazil and Other South American Countries

Hoffmann, Lúcia Vieira; Kresic, Iván Bonacic; Paz, Jorge Gabriel; Bela, Diego Alberto; Tcach, Nydia Elisa; Lamas, F. M.; Sofiatti, Valdinei

doi:10.1002/9781119385523.ch13

Cited by 5 publications

(4 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The detection of the polyphagous C. virescens also infesting processing tomatoes in Central Brazil might represent a potential pest management problem especially in relation to the establishment of more effective crop rotation systems. This geographical region is now one of the major producing areas of cotton (Hoffmann et al 2020) and soybean (Godoy et al 2015) crops in Brazil, which are severely affected by C. virescens (Bergvinson 2005;Albernaz et al 2012;Karpinski et al 2014).…”

Section: Discussionmentioning

confidence: 99%

Helicoverpa armigera Harm 1 Haplotype Predominates in the Heliothinae (Lepidoptera: Noctuidae) Complex Infesting Tomato Crops in Brazil

et al. 2021

View full text Add to dashboard Cite

Tomato (Solanum lycopersicum L.) is a natural host for the Helicoverpa-Chloridea (Lepidoptera: Noctuidae: Heliothinae) pest complex. The species Helicoverpa armigera (Hübner) was responsible for significant yield losses in several crops after its detection in Brazil. The morphology of its larval stage resembles common Heliothinae species, making pest control decisions difficult. The overall lack of studies on the Heliothinae associated with tomatoes in Brazil and the establishment of H. armigera in the country plus their recent outbreaks supported our investigation about the relative importance of the insects from the Helicoverpa-Chloridea complex in this vegetable crop. A nationwide survey was carried out across fresh-market and processing tomato fields. Molecular analyses targeting a segment of the mitochondrial cytochrome oxidase subunit I (mtCOI) gene and their sequence analyses indicated the presence of a pest complex, comprising the introduced species H. armigera and the indigenous species, Helicoverpa zea (Boddie), and Chloridea virescens (Fabricius). The Harm 1 haplotype of H. armigera was identified as the predominant Heliothinae pest infesting fresh-market tomatoes. The New World species Chloridea subflexa (Guenée) as well as the exotic Solanaceae-specific species Helicoverpa assulta (Guenée) were not found in our survey. Additional larvae surveys in processing tomato fields during 2013/2014 in Central Brazil also indicated H. armigera as the most abundant Heliothinae species (95%) together with H. zea (4.75%) and C. virescens (0.25%). The occurrence of distinct Helicoverpa species (which are potentially capable of interbreeding) indicates that novel crop management strategies will be necessary in order to minimize damages caused by this pest complex in tomatoes.

show abstract

Section: Discussionmentioning

confidence: 99%

Helicoverpa armigera Harm 1 Haplotype Predominates in the Heliothinae (Lepidoptera: Noctuidae) Complex Infesting Tomato Crops in Brazil

et al. 2021

View full text Add to dashboard Cite

show abstract

“…At the end 1990s, the Brazilian cotton industry nearly collapsed due to CDB ( Galbieri et al, 2017 ). The null or reduced yield imposed by CLRDV obligates Brazilian producers to seek resistant varieties ( Hoffmann et al, 2019 ). Today, almost all cotton varieties grown in Brazil are CBD resistant ( da Silva et al, 2015 ).…”

Section: The Viral Threat In Cottonmentioning

confidence: 99%

“…In 2006, new CLRDV strains able to break variety’s CBD resistance were detected in Brazil and Argentina and were responsible for a “new” CBD disease, namely, Atypical Cotton Blue Disease (ACBD; da Silva et al, 2015 ). The known vector continues to be A. gossypii , and losses associated with ACBD are significantly lower when compared to CDB ( Hoffmann et al, 2019 ). Between 2012 and 2021, India ( Mukherjee et al, 2012 ), Thailand ( Sharman et al, 2015 ), Timor-Leste ( Ray et al, 2016 ), Sudan ( Kumari et al, 2020 ), Uzbekistan ( Moukahel et al, 2021 ), and Australia ( Davis et al, 2021 ) have reported CLRDV.…”

Section: The Viral Threat In Cottonmentioning

confidence: 99%

The Viral Threat in Cotton: How New and Emerging Technologies Accelerate Virus Identification and Virus Resistance Breeding

Tarazi

Vaslin

2022

Front. Plant Sci.

View full text Add to dashboard Cite

Cotton (Gossypium spp. L., Malvaceae) is the world’s largest source of natural fibers. Virus outbreaks are fast and economically devasting regarding cotton. Identifying new viruses is challenging as virus symptoms usually mimic nutrient deficiency, insect damage, and auxin herbicide injury. Traditional viral identification methods are costly and time-consuming. Developing new resistant cotton lines to face viral threats has been slow until the recent use of molecular virology, genomics, new breeding techniques (NBT), remote sensing, and artificial intelligence (AI). This perspective article demonstrates rapid, sensitive, and cheap technologies to identify viral diseases and propose their use for virus resistance breeding.

show abstract

“…One of the major challenges in cotton production is the control of insect pests [ 1 ]. Brazil is among the largest cotton producers in the world; however, several crop areas are severely affected by the cotton boll weevil (CBW, Anthonomus grandis ), a devastating insect pest that could reduce cotton yield by 100% if left uncontrolled [ 2 ]. The use of chemical insecticides remains widespread in the control of this pest.…”

Section: Introductionmentioning

confidence: 99%

Stabilized Double-Stranded RNA Strategy Improves Cotton Resistance to CBW (Anthonomus grandis)

Ribeiro

Vasquez

Macedo

et al. 2022

IJMS

View full text Add to dashboard Cite

Cotton is the most important crop for fiber production worldwide. However, the cotton boll weevil (CBW) is an insect pest that causes significant economic losses in infested areas. Current control methods are costly, inefficient, and environmentally hazardous. Herein, we generated transgenic cotton lines expressing double-stranded RNA (dsRNA) molecules to trigger RNA interference-mediated gene silencing in CBW. Thus, we targeted three essential genes coding for chitin synthase 2, vitellogenin, and ecdysis-triggering hormone receptor. The stability of expressed dsRNAs was improved by designing a structured RNA based on a viroid genome architecture. We transformed cotton embryos by inserting a promoter-driven expression cassette that overexpressed the dsRNA into flower buds. The transgenic cotton plants were characterized, and positive PCR transformed events were detected with an average heritability of 80%. Expression of dsRNAs was confirmed in floral buds by RT-qPCR, and the T1 cotton plant generation was challenged with fertilized CBW females. After 30 days, data showed high mortality (around 70%) in oviposited yolks. In adult insects fed on transgenic lines, chitin synthase II and vitellogenin showed reduced expression in larvae and adults, respectively. Developmental delays and abnormalities were also observed in these individuals. Our data remark on the potential of transgenic cotton based on a viroid-structured dsRNA to control CBW.

show abstract

Cotton Production in Brazil and Other South American Countries

Cited by 5 publications

References 47 publications

Helicoverpa armigera Harm 1 Haplotype Predominates in the Heliothinae (Lepidoptera: Noctuidae) Complex Infesting Tomato Crops in Brazil

Helicoverpa armigera Harm 1 Haplotype Predominates in the Heliothinae (Lepidoptera: Noctuidae) Complex Infesting Tomato Crops in Brazil

The Viral Threat in Cotton: How New and Emerging Technologies Accelerate Virus Identification and Virus Resistance Breeding

Stabilized Double-Stranded RNA Strategy Improves Cotton Resistance to CBW (Anthonomus grandis)

Contact Info

Product

Resources

About