Espaçamento para a cultura da Mandioca

Takahashi, Mário; Guerini, Valdir Luis

doi:10.1590/s1516-89131998000400014

Cited by 10 publications

(8 citation statements)

References 2 publications

(1 reference statement)

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“…It was verified for all cultivars that over time W t adjusted better to the third-order polynomial In all cultivars, increasing the population density reduced the dry mass per plant. These results corroborate those of Takahashi and Guerini (1998), who in smaller populations of cassava plants, found a greater number of tuberous roots and higher W t per plant. However, the responses to the spacings are variable, due to the specific behavior of each cultivar.…”

Section: Resultssupporting

confidence: 91%

Analysis of cassava growth at different harvest times and planting densities

Oliveira¹,

Almeida²,

Zucareli³

et al. 2019

SCA

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Vegetative canopy architecture, and plant population density, has a direct influence on the growth and production of crops. The objective of this study was to evaluate the growth of four cassava cultivars of contrasting canopies, in four population densities, during two vegetative cycles. A randomized complete block design was used in a subdivided plot scheme, with two replications, with the population densities in the plots and harvesting times in the subplots. ‘Branca de Santa Catarina’ (BSC), ‘IAC 13’, ‘IAC 14-18’ and ‘Fibra’ were collected every four months, beginning at 120 and ending at 720 days after planting (DAP). Primary data on dry matter and leaf area were calculated. The total dry mass (Wt), leaf area ratio (La), leaf area index (L), relative growth rate (Rw), and net assimilation rate (Ea) were calculated based on the primary data. All cultivars accumulated more total dry mass (Wt) at lower planting densities. The plants reached a higher leaf area ratio (La) 120 days after planting. In the second vegetative cycle, the four cultivars, independently of the population, presented a reduction of assimilate translocation to the leaves. Relative growth rate (Rw) of the cultivars varied strongly with the plant population only in the second cycle. ‘IAC 14-18’ showed greater dependence on spacing, and ‘Fibra’ less dependence. Growth (Rw) and assimilatory (Ea) rates decreased at the end of the first cycle, then increased slowly until the end of the second cycle of vegetation.

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Section: Resultssupporting

confidence: 91%

Analysis of cassava growth at different harvest times and planting densities

Oliveira¹,

Almeida²,

Zucareli³

et al. 2019

SCA

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“…Large flour and fécula factories are installed in South , especially in Paraná state, that require cultivars with high starch yield and quality. The cassava cultivars most cultivated in Paraná state are Fibra, Olho Junto, Espeto, Fécula Branca, Mico, IAC 13 and IAC 14 (Tabela 4), mainly in Paranavaí, Cianorte, Campo Mourão and Umuarama (Takahashi and Gonçalo, 2001). The Mico, Aipim Gigante and Mandim Branca cultivars are the most planted in Santa Catarina state for use in the flour and fécula industries.…”

Section: Cultivars For Different Ecosystemsmentioning

confidence: 99%

Cassava Breeding

Fukuda¹,

Silva²,

Iglesias³

2002

CBAB

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The main factors concerned with cassava breeding are described, such as origin and domestication, botanic classification and relationship with other species, reproduction mode and floral biology, factors that influence flowering, factors that affect hybridization and seed production, genetics and cytogenetics, qualitative trait heredity, selection criteria for yield, hybridization techniques, general and specific breeding objectives, breeding methods, diffusion of new varieties, current state of breeding, main results and impacts, the future of breeding and cultivars recommended in Brazil. The main results obtained at the national and international level in the areas of germplasm and cassava genetic improvement are presented. A list is included with the description of the cultivars for the Northern, Northeastern, Southeastern, Central-Western and Southern regions of Brazil.

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“…Cassava culture (Manihot esculenta Crantz) is of major importance for tropical regions in the world, particularly in developing countries, where it plays major role in the feeding of more than 500 million people. This is due to the high productivity of carbohydrates per area, and for being a culture that does not need technological resources for its production (Cock 1982;Takahashi and Gonçalo 2005;FAO 2013).…”

Section: Introductionmentioning

confidence: 99%

“…(Hemiptera: Pseudococcidae), which is found in the center-south and south regions of the country (Pietrowski et al 2010), stands out for being a sap sucking insect of tuberous roots. Thus, it reduces storage accumulation and delays the plant's development, causing direct damage to productivity (Takahashi and Gonçalo 2005;Oliveira et al 2005;Pietrowski et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Entomopathogenic nematodes in the control of cassava root mealybug Dysmicoccus sp. (Hemiptera: Pseudococcidae)

Guide

Soares

Itimura

et al. 2018

Rev. Colomb. Entomol.

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The objective of this work was to evaluate the efficiency of entomopathogenic nematodes in the control of cassava root mealybug Dysmicoccus sp. under laboratory and greenhouse conditions. Cochineals were reared in “Cabotiá” pumpkin in climatic chambers at 27 ± 1 °C, with relative humidity (RH) of 70 ± 10%, and without photoperiod. The selection test was carried out with 15 isolates, and the ones which caused the greater percentage of insect mortality were used in concentration tests (0, 5, 10, 20, 50 Infective Juveniles/cm²), in sand column displacement, in the in vivo production of Galleria mellonella larvae, and in pathogenicity tests in greenhouse. The isolates NEPET11 (Heterorhabditis sp.) and RSC05 (H. amazonensis) showed the greatest virulence to cochineals in the selection trial, with mortality percentages of 93% and 90%, respectively, and did not differ between each other. In the concentration test, the isolate NEPET11 showed the greatest insect mortality in lower concentrations. With regard to the displacement test, both isolates showed 100% insect mortality, with no significant difference. In the G. mellonella larval production trial of NEPET11 and RSC05 isolates, approximately 7.0 x 104 and 7.2 x 104 infective juveniles/g larvae were produced, respectively, with no significant difference between treatments. Tests in greenhouse pots did not produced significant results.

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Espaçamento para a cultura da Mandioca

Abstract: 20,830, 16,660, 13,880, 11,900 and 10,410

Cited by 10 publications

References 2 publications

Analysis of cassava growth at different harvest times and planting densities

Analysis of cassava growth at different harvest times and planting densities

Cassava Breeding

Entomopathogenic nematodes in the control of cassava root mealybug Dysmicoccus sp. (Hemiptera: Pseudococcidae)

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