Alessandra Constantin FrancischiniSumitomo Chemical
Alessandra Constantin Francischini
PhD Agronomy
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36
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Publications
Publications (36)
A very limited amount of information is available in relation both to the residual effect of herbicides destinated to the destruction of cotton stalks and to the time interval required to prevent that development and yield of the following crop be affected. This work aimed to identify the residual activity of herbicides intended to eliminate cotton...
Carryover de herbicidas utilizados no controle de soqueiras do algodoeiro sobre o milho cultivado em sucessão Carryover of herbicides used in cotton stalk control on corn cultivated in succession RESUMO São limitadas as informações sobre a atividade residual de herbicidas aplicados no controle das soqueiras do algodoeiro e o seu potencial para afet...
Background:
Information on the carryover of herbicides applied to the destruction of cotton stalks, as well as the withdrawal period necessary to prevent the development and productivity of the crop in succession from being affected are limited in the literature.
Objective:
The objective was to identify the carryover effect promoted by herbicides...
The destruction of cotton stalks after harvesting is a prophylactic measure aimed at reducing the population of insects and disease inoculants that may remain in the crop residues and remaining cotton plants. The objective of this work was to evaluate integrated methods of management of the cotton stalks, combining mechanical and chemical control,...
Herbicide resistance in Amaranthus genus occurs frequently around the word and has become a big problem in cotton producing areas. The objective of this work was to evaluate cross-and multiple-resistance of redroot pigweed (A. retroflexus) to herbicides used in preemergence in cotton fields in Brazil. Seven dose-response experiments were conducted...
As aplicações de herbicidas em pré-emergência têm por finalidade a obtenção da
atividade residual no início do ciclo das culturas e a supressão de novos fluxos de plantas
daninhas. Contudo, esse efeito pode prejudicar culturas subsequentes, dependendo da
variedade utilizada e da persistência do herbicida no solo. Em virtude disso, o presente
trabal...
Due to the limited number of herbicides registered for the control of dicot weeds
in cotton crops, ALS inhibitors have been used on an intensive and recurrent basis. Given
that, cases of poor weed control have been described after application of these herbicides in
the main cotton producing areas in Brazil, the purpose of the present work was to ev...
When in competition with cotton, Amaranthus retroflexus can cause high yield
losses. Due to the limited availability of selective herbicides registered for post emergence
control of this weed, the same herbicides have been used repeated times over the last few
years, which may have selected resistant biotypes. Biotypes of A. retroflexus collected f...
Weed resistance to herbicides has been a major issue in Brazil, mainly due to
the inefficiency of the herbicides used in no-till areas and to the high cost of these herbicide
treatments. Failures in controlling the weed Conyza have been reported in Western and
Northern grain crop areas in Paraná (Brazil). This work aimed to evaluate the potential
o...
Devido ao limitado número de herbicidas registrados para o controle de dicotiledôneas no cultivo do algodoeiro, herbicidas inibidores da ALS tem sido utilizados de forma intensiva e recorrente. Em função de falhas de controle observadas com estes produtos nas principais áreas de produção desta cultura no Brasil, o presente trabalho teve por objetiv...
Due to the limited number of herbicides registered for the control of dicot weeds in cotton crops, ALS inhibitors have been used on an intensive and recurrent basis. Given that, cases of poor weed control have been described after application of these herbicides in the main cotton producing areas in Brazil, the purpose of the present work was to ev...
A resistência de plantas daninhas aos herbicidas tem causado grandes problemas, principalmente em relação à ineficácia dos tratamentos herbicidas utilizados em plantio direto e ao aumento do custo desses tratamentos. Falhas de controle após a aplicação de herbicidas em áreas com buva têm sido observadas nas regiões norte e oeste do Estado do Paraná...
When in competition with cotton, Amaranthus retroflexus can cause high yield losses. Due to the limited availability of selective herbicides registered for post emergence control of this weed, the same herbicides have been used repeated times over the last few years, which may have selected resistant biotypes. Biotypes of A. retroflexus collected f...
Recent reports of weed-control failures after the use of glyphosate led to suspicion about the selection of resistant biotypes of Conyza at locations in west and north Paraná, Brazil. Plants were collected, identified as Conyza sumatrensis and subsequently evaluated for possible resistance to glyphosate in four stages of weed development. The exper...
Weed resistance to herbicides has been a major issue in Brazil, mainly due to the inefficiency of the herbicides used in no-till areas and to the high cost of these herbicide treatments. Failures in controlling the weed Conyza have been reported in Western and Northern grain crop areas in Paraná (Brazil). This work aimed to evaluate the potential o...
When in competition with cotton, Amaranthus retroflexus can cause high yield losses. Due to the limited availability of selective herbicides registered for post emergence control of this weed, the same herbicides have been used repeated times over the last few years, which may have selected resistant biotypes. Biotypes of A. retroflexus collected f...
As aplicações de herbicidas em pré-emergência têm por finalidade a obtenção da atividade residual no início do ciclo das culturas e a supressão de novos fluxos de plantas daninhas. Contudo, esse efeito pode prejudicar culturas subsequentes, dependendo da variedade utilizada e da persistência do herbicida no solo. Em virtude disso, o presente trabal...
Weed control is generally accomplished by the use of herbicides. However, this practice is limited in sunflower cultivation,since only two products are registered for the culture (alachlor and trifluralin).The use of new technologies can facilitate weed control with herbicides with broad spectrum control. Therefore, the objective of this study was...
The vegetation that remains in the soil after harvest benefits the physical and chemical properties of soil. However, the straw becomes a barrier to the application of pre-emergence herbicides, preventing it from reaching the target. In these cases, the choice of spray tip and droplet size is essential for successful aplication. Thus, the objective...
Pre-emergence herbicide applications are designed to obtain residual activity at the beginning of the crop cycle. The objective of this study was to evaluate the residual activity of diuron, oxyfluorfen, and prometryne, applied alone or in mixture, to control Euphorbia heterophylla. Eight experiments were conducted under greenhouse conditions, by a...
Pre-emergence herbicide applications are designed to obtain residual activity at the beginning of the crop cycle. The objective of this study was to evaluate the residual activity of diuron, oxyfluorfen, and prometryne, applied alone or in mixture, to control Euphorbia heterophylla. Eight experiments were conducted under greenhouse conditions, by a...
The occurrence of dicotyledonous weeds has limited the increase of the area of sunflower cultivation in Brazil, due to their impact on crop yield. This is a result of a shortage of products registered for the crop with broad-spectrum control. Thus, two experiments were installed to evaluate the efficacy and selectivity of the imidazolinone herbicid...
Some species of Amaranthus are widely distributed in cotton crops. In recent years, ineffective weed control after herbicide use of some species has been reported. The current study was installed in order to find effective alternatives to a proper management of these species. Two simultaneous experiments were carried out for each species in this st...
Raw sugarcane harvest promotes an increase in crop residues of mulch on the soil. This new component changes the dynamics of weed infestation, also acting as a physical and chemical barrier against the action of herbicides. To improve the quality of herbicide deposition on the soil, this study aimed to evaluate the efficiency of spray nozzles and t...
A aplicação em pré-emergência no início do ciclo do algodoeiro é prática consagrada entre os produtores. Embora os herbicidas diuron, oxyfluorfen e prometryne sejam opções para uso nessa cultura, há informações limitadas referentes à eficácia desses herbicidas no controle de Euphorbia heterophylla. O objetivo do presente trabalho foi determinar a c...
A profundidade de semeadura adequada e um dos fatores importantes na germinacao e emergencia das plântulas, garantindo assim um estande uniforme. Sendo assim, este trabalho teve como objetivo avaliar o efeito da profundidade de semeadura do algodoeiro, variedade Delta Opal, sobre a fitotoxicidade dos herbicidas, diuron, oxyfluorfen, alachlor, cloma...
O manejo de plantas daninhas na cultura da cana-de-acucar esta baseado na integracao de metodos culturais, mecânicos, fisicos e quimicos. Em decorrencia da adocao da colheita da cana sem queima, foi introduzido um novo componente que altera tanto a dinâmica de infestacao de plantas daninhas como a acao dos herbicidas sobre a palha da cana. Em virtu...
The effects of α-pinene, which is one of the major components of essential oils of several aromatic species, on energy metabolism of mitochondria isolated from maize (Zea mays L.) coleoptiles and primary roots were investigated. α-Pinene exerted similar effects on oxygen consumption irrespective of the source of mitochondria or of the substrate (L-...
Avançados em Ciência das Plantas daninhas -Universidade Estadual de Maringá (NAPD/UEM); 2 Mestrando em Agronomia (NAPD/UEM) franchini@agronomo.eng.br; 3 Doutorando em Agronomia (NAPD/UEM); 4 Eng. Agr. Consultor ASTECPLAN S/C Ltda. RESUMO – O cerrado brasileiro atualmente constitui a base do cultivo do algodão (Gossypium hirsutum L). Como cultivado...
Núcleo de Estudos Avançados em Ciência das Plantas daninhas -Universidade Estadual de Maringá (NAPD/UEM); 2 Prof. Dr. Departamento de Agronomia (NAPD/UEM); 3 Mestrando em Agronomia (NAPD/UEM) franchini@agronomo.eng.br; 4 Doutorando em Agronomia (NAPD/UEM). RESUMO – A presença de plantas daninhas no algodoeiro acarreta em reduções de produtividade e...
Resumo A utilização indiscriminada do glyphosate tem aumentado a pressão de seleção em várias espécies de plantas daninhas, entre elas a Conyza sp (buva), selecionando assim, biótipos resistentes ou mais tolerantes à este herbicida, tornando cada vez mais difícil seu controle. Dessa forma, o objetivo deste trabalho foi avaliar a eficácia de alterna...
