Coffee leafminer, Leucoptera coffeella, is a pest in many New World coffee growing areas. Previous studies suggested that its population dynamics were. J Econ Entomol. Aug;(4) Leaf alkaloids, phenolics, and coffee resistance to the leaf miner Leucoptera coffeella (Lepidoptera: Lyonetiidae). Neotrop Entomol. Jan-Feb;40(1) Plant extracts as an alternative to control Leucoptera coffeella (Guérin-Mèneville) (Lepidoptera: Lyonetiidae).
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Effects of phytoextracts and natural enemy to control Plutella xylostella L.
Identification, localization and insecticidal synergism with coffwella. Another example is the feeding deterrent activity of T. Despite the abamectin insecticide not being among those at risk of resistance in L.
In our study, the quantification of 1 was done taking in account a stereoisomeric mixture because the absolute configuration of the natural pheromone still remains unknown. Buy the complete issue. Insecticidal activity of some essential oils against larvae of Spodoptera littoralis.
Perileucoptera coffeella (LEUCCO)[Overview]| EPPO Global Database
Preliminary tests using only discs soaked in water were carried out to observe caterpillar mortality over a h period. Acknowledgments The funding and fellowships provided by the following Brazilian agencies were greatly appreciated: White spherical symbols within the dark spots represent collection sites of leafminer populations.
On the fifth and sixth axes, a positive relationship was observed doffeella the profenofos insecticide and the standard deviation. Leucoptera coffeellaone of the most serious coffee pests in the New World, is considered an introduced species, suitable for classical biological control, although its exact origin is uncertain.
Ordination diagram showing discrimination of insecticide resistance between Brazilian populations of Leucoptera coffeella. Haworth Noctuidae and the Trichoplusia ni.
Insects usually have a resistance mechanism that confers nerve insensitivity, known as knockdown resistance Kdras first reported in M. Insect Science and its Applicationv. In recent years, however, the number of pyrethroid applications in coffee production has been greatly reduced.
Similar experiments have been done with other insects, such as the mosquito Culex tarsalis Diptera: Spherical gray symbols are centroids of treatments and represent the average of canonical variable classes. Leucoptera coffeellanatural products, botanical insecticide, alternative control. It furthers the University’s objective of excellence in research, scholarship, and education by publishing worldwide. Environmental Entomologyv.
Leucoptera coffeella – Wikipedia
High resistance leuucoptera were observed for profenofos In Colombia, this insect pest has been poorly studied, since the damage it causes has been sporadic. Results and Discussion A typical chromatogram for all experiments is illustrated in Figure 1. The hours during which the largest amounts of the pheromone were extracted from the glands were at the time of lights on, indicating that this is the cue for pheromone production.
The opposite relationship was observed for assistance with the chlorpyrifos insecticide on the third and fourth axes. Our study reported high variations in the resistance ratio RT 50 of the organophosphates profenofos times and chlorpyrifos 19 times compared to the susceptible population of L. The extracts from Achillea millefoliumCitrus limonGlechoma hederaceaMalva sylvestrisMangifera coffeellsMentha spicataMirabilis cofdeellaMusa sapientumOcimum basiculumPetiveria alliaceaePorophyllum ruderalePsidium guajavaRosmarinus officinalisRoupala montanaSambucus nigra and Tropaeolum majus showed the highest mortality rates.
Time-mortality coffeela For time-mortality analysis, circular discs diameter 90 mm of filter paper were dipped into the insecticide solutions diluted in distilled water, using the recommended doses to control L. Volatile monoterpenes in Porophyllum gracile and P. These concentrations were higher than those tested for profenofos and chlorpyrifos in our study.
EPPO Global Database
Results and discussion Resistance to neurotoxic insecticides varied generally among the different populations of L. Natural compound 1 was identified in the pheromone gland extract comparing with retention time of synthetic compound 1.
We selected six municipalities with coffee cultivation of the species C. Journal of Chemical Ecologyv. Isolation and characterization of a novel class of plant antimicrobial peptides from Mirabilis jalapa L seeds.
Materials and methods 2. UFLA,p.
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The periodicity of pheromone production and the age effect on the pheromone production were assessed by second degree polynomial regression analysis of the data. Furthermore, resistance may be associated with the distance between the producing regions, and local selection favored by dispersal seem important for insecticide resistance evolution among Brazilian populations of L.
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