Foliar fungal diseases control and productivity depending on the phosphite and fungicide application in two corn hybrids
Journal Title: Biotecnología Vegetal - Year 2020, Vol 20, Issue 1
Abstract
Foliar diseases are among the main factors of losses in productivity and grain quality in all corn (Zea mays L.) producing regions. The objective of this work was to evaluate the control of corn foliar fungal diseases and yield as a function of phosphite and fungicide application. Two experiments were generated in the agricultural years 2014/2015 and 2015/2016, under “cerrado” area, in the municipality of Gurupi, Tocantins, Brazil. It was used a randomized block design in a factorial scheme of 4 (foliar treatment with fungicide, phosphite, fungicide mixture plus phosphite and water), x 2 (corn hybrids, AG7088 PROX and 30F53YH), with three replications. The products were applied in the stages with leaves and tasseling. For evaluating the disease severity, it was used a scale of visual grades. With severity, the Area Under Disease Progress Curve (AUDPC) was calculated. Besides, were determined the mass of thousand grains (kg ha-1) and the productivity (kg ha-1). The hybrid AG7088 PROX showed low severity of the diseases found: Bipolaris maydis, polysorbital rust and Curvularia spot. In the genotype 30F53YH, it was verified a higher AUDPC of the polysor rust, being its control more effective with an application of the fungicide and in mixture with the phosphite. The application of phosphite did little to reduce the AUDPC of the diseases when compared to the fungicide, alone or in mixture with the phosphite, but high productivity was obtained with the use of phosphite alone or in mixture with the fungicide.
Authors and Affiliations
Jaiza Francisca Ribeiro Chagas, Rodrigo Véras da Costa, Gil Rodrigues dos Santos, Matheus Vinicius Abadia Ventura, Estevam Matheus Costa
Keywords
Related Articles
- EP ID EP696372
- DOI -
- Views 56
- Downloads 0
Field evaluation of genetic stability in plants obtained by somatic embryogenesis of cv. ‘FHIA 21’ hybrid (Musa AAAB)
The present work was carried to evaluate the genetic stability in plants obtained by somatic embryogenesis of cv. hybrid ‘FHIA 21’ (Musa AAAB) in field. A number of 6 252 plants were planted and 2 000 plants obtained by...
Selection of Azotobacter chroococcum strains for its application on in vitro pineapple cv. ‘Cayena lisa’ plants acclimatization
Azotobacter chroococcum is a rhizosphere bacterium that has been used for decades as a plant growth stimulator in a wide range of crops. It is able to fix nitrogen and produce growth promoting substances. In the presen...
Obtaining transgenic plants of papaya var. Red Maradol carrying the rice oryzacystatin gene
Papaya (Carica papaya L.), is severely affected by Papaya Ringspot virus, which belongs to plant potyvirus group. A recent strategy for pest control produced by this virus is the transformation with genes encoding cystei...
Mycobiota of donor plants and fungal contaminants from the in vitro establishment of bamboo species
The presence of fungal contaminants may limit the establishment of bamboos explants. Knowing the contaminant microorganisms present in donor plants allow to trace more appropriate control strategies. This work was aimed...
Response of Phaseolus vulgaris L. cultivars to drought stress
Tolerance to drought is a desired cultivars of Phaseolus vulgaris L. The present study aimed to determine the response of 22 cultivars of common bean during the early stages of vegetative development character. The pla...