Interference of spray volume, fruit growth and rainfall on spray deposits in citrus black spot control periods

Araújo, Demétrius de; Raetano, Carlos Gilberto; Ramos, Hamilton Humberto; Rocha, Douglas Sampaio Ribeiro da; Prado, Evandro Pereira; Aguiar, Viviane Corrêa

doi:10.1590/0103-8478cr20150944

Cited by 4 publications

(1 citation statement)

References 11 publications

(12 reference statements)

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“…Hence, different results may be obtained, if spray tests would be performed on older and larger trees. In mature orchards with 4-4.5 m-tall trees, spraying 35 to 580 mL•m −3 resulted, in general, in a lower spray coverage at mid and top heights [87,88]. Moreover, although the spray coverage was higher for trees on the most vigorous rootstocks, there was no significant influence of the tree density at five years of age.…”

Section: Cropping Practices Can Benefit From Ultra-high Pedestrian Orchardsmentioning

confidence: 91%

The Perfect Match: Adjusting High Tree Density to Rootstock Vigor for Improving Cropping and Land Use Efficiency of Sweet Orange

et al. 2021

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The rise in the productivity of sweet orange in Brazil has been related to the use of superior rootstocks and higher tree density, among other factors. In order to investigate whether the cropping system and the land use efficiency would benefit from more intensive cultivation, the performance of Valencia sweet orange was evaluated over nine years on four rootstocks, which induced contrasting vigor, at 513, 696 and 1000 trees·ha−1. Agronomic Institute of Campinas (IAC) 1697 and IAC 1710 citrandarins, and diploid and allotetraploid (4×) Swingle citrumelos were classified as semi-dwarfing, super-standard, standard, and dwarfing rootstocks, respectively. The fruit yield per tree was decreased at higher tree densities, notably for more vigorous rootstocks. Conversely, the cumulative productivity was increased over the evaluation period by 27% at 1000 trees·ha−1, irrespective of the rootstock, and the most vigorous rootstock resulted in 2.5 times higher production than the dwarfing one on average. Most fruit quality parameters were seldom influenced by the tree density, while the rootstock was a decisive factor in improving the quality and the soluble solids content. Dwarfing rootstocks allowed for harvesting 17% more fruit per minute by manual pickers. Because the tree row volume per area is lower with such rootstocks, even at higher tree density, spray volume can be reduced, although appropriate equipment should be developed for better spray coverage on smaller trees. Nine years after planting under strict vector control, the cumulative incidence of huanglongbing-symptomatic trees on IAC 1710 was double that on Swingle 4×. Taken together, the results suggested that the land use efficiency in the citrus industry can be further improved by planting vigorous rootstocks at moderate to high tree densities. Nevertheless, obtaining highly productive semi-dwarfing and dwarfing rootstocks is the sine qua non for making high-density pedestrian sweet orange orchards more profitable.

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Section: Cropping Practices Can Benefit From Ultra-high Pedestrian Orchardsmentioning

confidence: 91%

The Perfect Match: Adjusting High Tree Density to Rootstock Vigor for Improving Cropping and Land Use Efficiency of Sweet Orange

et al. 2021

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Analysis of Spray Behavior Using Different Sprayers in Citrus Groves

Benalia

Violi

Barreca

et al. 2022

Lecture Notes in Civil Engineering

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Near ground platform development to simulate UAV aerial spraying and its spraying test under different conditions

Zhang

et al. 2018

Computers and Electronics in Agriculture

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Interference of spray volume, fruit growth and rainfall on spray deposits in citrus black spot control periods

Abstract: Citrus black spot (CBS) caused by Guignardia citricarpa is one of the most serious Brazilian citrus diseases. This study aims to assess the interference of three application volumes in spray deposition citrus fruit, as well as fruit

Cited by 4 publications

References 11 publications

The Perfect Match: Adjusting High Tree Density to Rootstock Vigor for Improving Cropping and Land Use Efficiency of Sweet Orange

The Perfect Match: Adjusting High Tree Density to Rootstock Vigor for Improving Cropping and Land Use Efficiency of Sweet Orange

Analysis of Spray Behavior Using Different Sprayers in Citrus Groves

Near ground platform development to simulate UAV aerial spraying and its spraying test under different conditions

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