Efficiency of reduced volume spraying aimed to control the Leucoptera coffeella (Lepidoptera: lyonetiidae)

Lasmar, Olinto; Ferreira, Marcelo da Costa; Decaro, Sérgio Tadeu; Fouquet, Gunther

doi:10.14393/bj-v32n5a2016-32894

Cited by 2 publications

(1 citation statement)

References 14 publications

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“…2 Chemical methods are the techniques most often used by coffee producers to control L. coffeella. 3 The main insecticides employed are organophosphates, pyrethroids and carbamates, which exhibit a wide spectrum of action and are responsible for biological imbalances. 4 To circumvent such a problem, plants appear to be promising sources of new products to control insects, since many research groups have demonstrated the ability of several plant species to produce substances active against insects.…”

Section: Introductionmentioning

confidence: 99%

URSOLIC ACID AND CIS-TILIROSIDE PRODUCED BY Merremia tomentosa AFFECT OVIPOSITION OF Leucoptera coffeella ON COFFEE PLANTS

Júnior¹,

Lopes²,

Alves³

et al. 2018

Quim. Nova

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publicado na web em 18/01/2018To contribute to the development of new products to control the coffee leaf miner (Leucoptera coffeella), which is a major pest for coffee plants, this work aimed to select plant species able to produce substances active against this insect and to identify the active substances in the selected plant and their protein targets in the insect. Among the extracts of nineteen plant species, only that from leaves of Merremia tomentosa (Choisy) Hall. f. (Convolvulaceae) reduced the oviposition of L. coffeella on leaves of coffee plants. This extract was submitted to successive fractionation steps to achieve the isolation and identification of two active substances, ursolic acid (UA) and cis-tiliroside (CT). An in silico study showed that UA inhibits glycogen phosphorylases (GP) by binding to their allosteric site, while CT probably inhibits xanthine dehydrogenases (XT). As both GP and XT appear to be essential enzymes for insects, these results suggest that, during evolution, L. coffeella learned to identify plants producing inhibitors of these enzymes to avoid oviposition on such plants. Thus, both UA and CT have potential to be used as lead compounds in the development of new products for the control of the coffee leaf miner.

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Section: Introductionmentioning

confidence: 99%

URSOLIC ACID AND CIS-TILIROSIDE PRODUCED BY Merremia tomentosa AFFECT OVIPOSITION OF Leucoptera coffeella ON COFFEE PLANTS

Júnior¹,

Lopes²,

Alves³

et al. 2018

Quim. Nova

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Spray Deposition and Losses to Soil from a Remotely Piloted Aircraft and Airblast Sprayer on Coffee

Cunha,

Lopes,

Alves

et al. 2024

AgriEngineering

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Remotely piloted aircraft (RPAs) have been increasingly used for crop protection in coffee plantations. However, the applications can result in low spray deposition on leaves and higher product losses between rows compared to ground airblast sprayers. This study aimed to evaluate the spray deposition on the coffee canopy and potential losses to the soil during application with an RPA and an airblast sprayer at varying spray volumes. The experiment comprised four spray treatments: RPA at 10 L ha−1 and 20 L ha−1, and airblast sprayer at 200 L ha−1 and 300 L ha−1. Leaf deposition was quantified by measuring a tracer on leaves from the lower and upper parts of the coffee canopy using spectrophotometry. Spray losses to the soil were measured by analyzing tracer residues on Petri dishes positioned within the inter-rows and beneath the coffee canopy. Statistical process control was used to analyze spray deposition quality in the study area. Ground-based airblast spraying resulted in the highest overall canopy deposition, while RPA spraying led to greater losses within the inter-rows. No significant difference was observed in spray runoff beneath the canopy between ground-based and aerial applications. Leaf deposition exhibited random variability across all application methods. Therefore, application stability, control, and spray quality standards were maintained.

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Efficiency of reduced volume spraying aimed to control the Leucoptera coffeella (Lepidoptera: lyonetiidae)

Cited by 2 publications

References 14 publications

URSOLIC ACID AND CIS-TILIROSIDE PRODUCED BY Merremia tomentosa AFFECT OVIPOSITION OF Leucoptera coffeella ON COFFEE PLANTS

URSOLIC ACID AND CIS-TILIROSIDE PRODUCED BY Merremia tomentosa AFFECT OVIPOSITION OF Leucoptera coffeella ON COFFEE PLANTS

Spray Deposition and Losses to Soil from a Remotely Piloted Aircraft and Airblast Sprayer on Coffee

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