scholarly journals Computer simulation of the coffee leaf miner using sexual Penna aging model

2008 ◽  
Vol 387 (2-3) ◽  
pp. 476-484 ◽  
Author(s):  
A.C.S. de Oliveira ◽  
S.G.F. Martins ◽  
M.S. Zacarias
Keyword(s):  
Computer Simulation ◽  
Leaf Miner ◽  
Aging Model ◽  
Coffee Leaf Miner

scholarly journals Insecticide use and organophosphate resistance in the coffee leaf miner Leucoptera coffeella (Lepidoptera: Lyonetiidae)

2002 ◽  
Vol 92 (3) ◽  
pp. 203-212 ◽  
Author(s):  
D.B. Fragoso ◽  
R.N.C. Guedes ◽  
M.C. Picanço ◽  
L. Zambolim
Keyword(s):  
Insecticide Resistance ◽  
Methyl Parathion ◽  
Leaf Miner ◽  
Organophosphate Resistance ◽  
Standard Population ◽  
Resistant Population ◽  
Insect Populations ◽  
Leucoptera Coffeella ◽  
Coffee Leaf Miner ◽  
Brazilian Populations

AbstractIncreasing rates of insecticide use against the coffee leaf miner Leucoptera coffeella (Guérin-Méneville) and field reports on insecticide resistance led to an investigation of the possible occurrence of resistance of this species to some of the oldest insecticides used against it in Brazil: chlorpyrifos, disulfoton, ethion and methyl parathion. Insect populations were collected from ten sites in the state of Minas Gerais, Brazil and these populations were subjected to discriminating concentrations established from insecticide LC99s estimated for a susceptible standard population. Eight of the field-collected populations showed resistance to disulfoton, five showed resistance to ethion, four showed resistance to methyl parathion, and one showed resistance to chlorpyrifos. The frequency of resistant individuals in each population ranged from 10 to 93% for disulfoton, 53 to 75% for ethion, 23 to 76% for methyl parathion, and the frequency of resistant individuals in the chlorpyrifos resistant population was 35%. A higher frequency of individuals resistant to chlorpyrifos, disulfoton and ethion was associated with greater use of insecticides, especially other organophosphates. This finding suggests that cross-selection, mainly between organophosphates, played a major role in the evolution of insecticide resistance in Brazilian populations of L. coffeella. Results from insecticide bioassays with synergists (diethyl maleate, piperonyl butoxide and triphenyl phosphate) suggested that cytochrome P450-dependent monooxygenases may play a major role in resistance with minor involvement of esterases and glutathione S-transferases.

Laboratory studies of insecticides against the coffee leaf-miner Leucoptera Meyricki Ghesq. (Lepidoptera, Lyonetiidae)

1963 ◽  
Vol 54 (2) ◽  
pp. 167-174 ◽  
Author(s):  
P. E. Wheatley
Keyword(s):  
Methyl Parathion ◽  
Field Trials ◽  
Leaf Miner ◽  
Laboratory Studies ◽  
Leaf Miners ◽  
Larval Stages ◽  
Air Stream ◽  
Bioassay Technique ◽  
Coffee Leaf Miner ◽  
Future Date

The coffee leaf-miners Leucoptera meyricki Ghesq. and L. caffeina Wshbn. are serious pests of arabica coffee in Kenya. At the present time sprays containing parathion, methyl-parathion or diazinon are used extensively for their control.To facilitate preliminary investigations into various aspects of insecticidal control of the larval stages of these pests, a laboratory bioassay technique was developed. Larvae were reared on detached coffee leaves placed on moist filter paper in plastic boxes. When the larvae were in their third instar, the leaves were sprayed in a Potter tower and then kept in a moist air stream for three days before the mines were dissected to enable mortality counts to be made.Of 22 new insecticides screened, only Sumithion (O, O–dimethy1 O–(3–methy1–4–nitrophenyl) phosphorothioate) and fenthion gave mortalities higher than those achieved with diazinon. Parathion gave somewhat higher mortalities than methyl-parathion, and emulsifiable formulations of these insecticides were more effective than wettable powders. The inclusion of additional wetting agents increased the efficiency of commercial formulations of these two insecticides. These results are subject to confirmation in field trials.The mode of action of parathion was investigated. Dosage/mortality lines were constructed for parathion, methyl-parathion and diazinon so that resistance to these insecticides by L. meyricki could be detected should it develop at some future date. L. caffeina was found to be apparently more susceptible to these insecticides than L. meyricki and this was believed to be due to its greater rate of feeding.

Computer simulation of Aphis gossypii insects using Penna aging model

2006 ◽  
Vol 368 (1) ◽  
pp. 147-154 ◽  
Author(s):  
L.T.P. Giarola ◽  
S.G.F. Martins ◽  
M.C.P. Toledo Costa
Keyword(s):  
Computer Simulation ◽  
Aphis Gossypii ◽  
Aging Model

scholarly journals Reproductive capacity of Mirax insularis - Muesebeck (Hym: Braconidae) in larvae of the coffee leaf miner, Leucoptera coffeella- GuérinMéneville and Perrottet 1842 (Lep: Lyonetiidae).

1969 ◽  
Vol 96 (3-4) ◽  
pp. 221-234
Author(s):  
Marcela Daza ◽  
Fernando Gallardo
Keyword(s):  
Reproductive Potential ◽  
Reproductive Capacity ◽  
Leaf Miner ◽  
Experimental Unit ◽  
Artificial Rearing ◽  
Significant Difference ◽  
Rearing Conditions ◽  
Leucoptera Coffeella ◽  
Correlation Tests ◽  
Coffee Leaf Miner

The braconid Mirax insularis Muesebeck Is a koinoboint parasitoid of the coffee leafminer, Leucoptera coffeella Guérin-Méneville & Perrottet, ¡n Puerto Rico. However, their reproductive capacity under artificial rearing conditions of the leafminer is not known. The objective of this study was to determine its reproductive potential in larvae of 1st and 2nd instar of L. coffeella. Reproductive capacity tests showed significant differences (test t-Student, P < 0.05) in the preference of M. insularis for 2nd instar larvae with 7% of parasitization, whereas in 1st instar it gained only 5%. The average oviposition of M. insularis increases three folds (14 eggs per female) in a period of 48 hours on 2nd instar when compared to 1st instar. In the analysis of variance, the treatments that showed a significant difference (Tukey test, P < 0.05) were those with densities of 60 to 80 parasitoids per experimental unit on 2nd instar. Correlation tests find that there is a correlation (R = 0.453, P = 0.547) among the progeny of M. insularis produced when using larvae of the 1st instar. However, there is a positive correlation (R = 0.981, P = 0.019) when using 2nd instar larvae. The parasitization of M. insularis is higher when performing inoculations with 60 to 80 parasitoids on 2nd instar, producing a progeny of 365 and 480 parasitoids, respectively.

scholarly journals COFFEE LEAF MINER INCIDENCE AND ITS PREDATION BY WASP IN COFFEE INTERCROPPED WITH RUBBER TREES

2018 ◽  
Vol 13 (3) ◽  
pp. 389 ◽  
Author(s):  
Humberto Godoy Androcioli ◽  
Adriano Thibes Hoshino ◽  
Ayres De Oliveira Menezes Júnior ◽  
Heverly Morais ◽  
Rodolfo Bianco ◽  
...  
Keyword(s):  
Leaf Miner ◽  
Coffee Leaf Miner

scholarly journals A Comprehensive Review of the Coffee Leaf Miner Leucoptera coffeella (Lepidoptera: Lyonetiidae)—A Major Pest for the Coffee Crop in Brazil and Others Neotropical Countries

Insects ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1130
Author(s):  
Juliana Dantas ◽  
Isabela O. Motta ◽  
Leonardo A. Vidal ◽  
Eliza F. M. B. Nascimento ◽  
João Bilio ◽  
...  
Keyword(s):  
Control Strategies ◽  
Integrated Approach ◽  
Leaf Miner ◽  
Coffee Production ◽  
Production Chain ◽  
Market Requirements ◽  
Major Pest ◽  
Significant Yield ◽  
Leucoptera Coffeella ◽  
Coffee Leaf Miner

The coffee leaf miner (CLM) Leucoptera coffeella moth is a major threat to coffee production. Insect damage is related to the feeding behavior of the larvae on the leaf. During the immature life stages, the insect feeds in the mesophyll triggering necrosis and causing loss of photosynthetic capacity, defoliation and significant yield loss to coffee crops. Chemical control is used to support the coffee production chain, though market requirements move toward conscious consumption claiming for more sustainable methods. In this overview, we discuss aspects about the CLM concerning biology, history, geographical distribution, economic impacts, and the most relevant control strategies in progress. Insights to develop an integrated approach for a safer and eco-friendly control of the CLM are discussed here, including bio-extracts, nanotechnology, pheromones, and tolerant cultivars.

scholarly journals Predators impairing the natural biological control of parasitoids

2000 ◽  
Vol 29 (3) ◽  
pp. 507-514 ◽  
Author(s):  
Ronaldo Reis Jr ◽  
Og De Souza ◽  
Evaldo F. Vilela
Keyword(s):  
Biological Control ◽  
Food Web ◽  
Natural Enemies ◽  
Leaf Miner ◽  
Parasitoid Species ◽  
Coffee Plantation ◽  
Wasp Species ◽  
Control Programs ◽  
Food Web Interactions ◽  
Coffee Leaf Miner

A well known case of ineffective natural biological control: the puzzling coexistence of the coffee leaf miner, Leucoptera coffeellum (Guérin-Mèneville), and its natural enemies was analyzed. Despite being a suitable prey to eight parasitoid species and three wasp species, all occurring simultaneously, the coffee leaf miner too often presents populations far above the damaging level for the coffee plantation. It is demonstrated that predatory wasps and parasitoids interact negatively, possibly because predatory wasps kill parasitized miner's larvae. In doing so, predatory wasps indirectly kill parasitoids, thereby impairing the efficacy of the natural biological control. It is warned that biological control programs should be based on knowledge of food web interactions, rather than simply on strategies involving introduction of exotic natural enemies.

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