Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Francisco Ivaldo Oliveira Melo is active.

Publication


Featured researches published by Francisco Ivaldo Oliveira Melo.


Pesquisa Agropecuaria Brasileira | 2005

Mutantes morfológicos de algodoeiro herbáceo como fonte de resistência ao bicudo

Francisco das Chagas Vidal Neto; Fanuel Pereira da Silva; Ervino Bleicher; Francisco Ivaldo Oliveira Melo

This work aimed to evaluate the effects of three morphological mutants of upland cotton lines (Gossypium hirsutm L. r. latifolium Hutch.), isolated or in combination in the same cotton genotype, as a source of resistance to boll weevil, Anthonomus grandis Boheman, 1843 (Coleoptera, Curculionidae). The experiment was carried out in the field, under natural infestation, with a completely randomized block design arranged in a factorial 2× 3 plus an additional treatment, with four replications. In a multiple choice test, the character mutant frego bract presented the higher reduction on boll weevil oviposition damage (34.71%), in relation to the normal equivalent. The okra leaf reduced the boll weevil damage only when associated with frego bract (40%). The combination of the three mutant characters in the same plant presented the least square percent with oviposition damage (23.13%).


Planta Daninha | 2000

Controle químico de plantas daninhas na cultura do arroz irrigado no estado do Ceará

Francisco J. Santos; João Bosco Pitombeira; João Licínio Nunes de Pinho; Francisco Ivaldo Oliveira Melo

A field experiment was conducted, during the dry season of 1995, on alluvial soil of the Vale do Curu Experimental Farm, State of Ceara, Brazil, in order to evaluate the effect of the herbicides: propanil (4.8 kg a.i.ha-1), fenoxapropethyl (0.14 kg a.i.ha-1), fenoxaprop-p-ethyl (0.11 kg a.i.ha-1), oxadiazon (0.62 kg a.i.ha-1) and the mixtures propanil + molinate (2.52+2.52 kg a.i.ha-1 ) and propanil + 2,4-D (2.72+0.22 kg a.i.ha-1) on the control of weeds in rice, cultivars METICA-1 and CICA-8, growing under flood irrigation. The best weed control and paddy rice yield were provided by propanil and the mixtures propanil + 2,4-D and propanil + molinate. Plant height, days to flowering, head size and the weight of 1000 seeds were not affected by the herbicides. The symptoms of toxicity caused by the herbicides on the rice plants of the two cultivars were slightly severe.


Ciencia Rural | 2008

Preferência de Bemisia tabaci biótipo B em linhagens mutantes de algodoeiro

Francisco das Chagas Vidal Neto; Fanuel Pereira da Silva; Ervino Bleicher; Francisco Ivaldo Oliveira Melo

The effects of cotton lines (Gossypium hirsutum L. r. latifolium Hutch.) with mutants morphologic characteristics: okra leaf, frego bract and red plant in relation to host plant resistance to whitefly (Bemisia tabaci bioyipe B Hemiptera: Aleyrodidae), were evaluated in choice or no choice assays. The assays were carried out in the greenhouse conditions, according to a completely randomized block design, in a 23 + 1 in a factorial arrangement with four replications. The mutant with red plant characteristic was less attractive and less preferred for oviposition than the normal green plant does, in both, whit or without choice tests. It did not have preference in relation to the form of the leaf and bract type.


Pesquisa Agropecuaria Brasileira | 1997

Produção, componentes de produção, crescimento e distribuição das raízes de caupi submetido à deficiência hídrica

Magna Maria Macedo Nunes Costa; Francisco José Alves Fernandes Távora; João Licínio Nunes de Pinho; Francisco Ivaldo Oliveira Melo


Brazilian Journal of Genetics | 1996

Okra-leaf and normal cotton isolines with different backgrounds

Fanuel Perreira da Silva; Francisco Ivaldo Oliveira Melo; Francisco José Alves Fernandes Távora; F.V Costa Neto


Revista Brasileira de Fisiologia Vegetal (Brazil) | 1995

Yield components and partitioning characteristics of cassava in the coastal area of Ceara

J. L. N. de Pinho; Francisco José Alves Fernandes Távora; Francisco Ivaldo Oliveira Melo; G. M. de Queiroz


Pesquisa Agropecuaria Brasileira | 1982

Comportamento de cultivares de mandioca com diferentes características foliares submetidas a diversas densidades de plantio

Francisco José Alves Fernandes Távora; Genário Marcolino de Queiroz; João Licínio Nunes de Pinho; Francisco Ivaldo Oliveira Melo


Revista Ciencia Agronomica (Brazil) | 2004

Influence of irrigation levels on the growth phenology of common and dwarf cashew progenies during their first twenty months

R.C.M. Mesquita; J.I.G. Parente; A.A.T. Montenegro; José Tarciso Alves Costa; Francisco Ivaldo Oliveira Melo; J.L.N. de Pinho; A.T. Cavalcanti Junior


Pesquisa Agropecuaria Brasileira | 2001

Influência do cálcio nas características físicas e no teor de cálcio durante desenvolvimento e maturação da uva 'Itália'

Maria Auxiliadora Coêlho de Lima; Joston Simão de Assis; Ricardo Elesbão Alves; José Tarciso Alves Costa; Francisco Ivaldo Oliveira Melo


Pesquisa Agropecuaria Brasileira | 1993

Crescimento e produção da mandioca submetida a dois arranjos de plantio

Francisco José Alves Fernandes Távora; Francisco Ivaldo Oliveira Melo

Collaboration


Dive into the Francisco Ivaldo Oliveira Melo's collaboration.

Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Ervino Bleicher

Federal University of Ceará

View shared research outputs
Top Co-Authors

Avatar

Francisco das Chagas Vidal Neto

Empresa Brasileira de Pesquisa Agropecuária

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Researchain Logo
Decentralizing Knowledge