Effect of citrus leaf-miner damage, mechanical damage and inoculum concentration on severity of symptoms of Asiatic citrus canker in Tahiti lime

2007 ◽  
Vol 26 (2) ◽  
pp. 59-65 ◽  
Author(s):  
R.S.C. Christiano ◽  
M. Dalla Pria ◽  
W.C. Jesus Junior ◽  
J.R.P. Parra ◽  
L. Amorim ◽  
...  
Keyword(s):  
Mechanical Damage ◽  
Citrus Canker ◽  
Leaf Miner ◽  
Inoculum Concentration ◽  
Citrus Leaf

scholarly journals Evaluation of Resistance to Asiatic Citrus Canker among Selections of Pêra Sweet Orange (Citrus sinensis)

Plant Disease ◽  
2016 ◽  
Vol 100 (10) ◽  
pp. 1994-2000 ◽  
Author(s):  
Aline M. O. Gonçalves-Zuliani ◽  
Danielle S. Y. Nanami ◽  
Bruna R. Barbieri ◽  
Terezinha A. Guedes ◽  
Carlos A. Zanutto ◽  
...  
Keyword(s):  
Host Resistance ◽  
Citrus Sinensis ◽  
Field Experiments ◽  
Sweet Orange ◽  
Citrus Canker ◽  
Leaf Miner ◽  
Citrus Leaf ◽  
Greenhouse Experiments ◽  
Lesion Diameter ◽  
Mesophyll Resistance

Asiatic citrus canker (ACC, caused by the bacterium Xanthomonas citri subsp. citri) is a destructive disease of citrus in Brazil and in several other citrus-producing countries. ACC management is problematic, and bactericides such as copper can be reasonably efficacious but do not completely control the disease. Furthermore, injury by citrus leaf miner (CLM) can exacerbate severity of ACC. Host resistance is the most desirable solution for management of ACC; however, evaluations of germplasm indicate that resistance is limited in many popular species and cultivars that are grown commercially. Limited evaluations have been made of sweet orange (Citrus sinensis) selections. We evaluated resistance of 25 Pêra sweet orange selections to X. citri subsp. citri by wound inoculation and measuring lesion diameter under greenhouse conditions (wound inoculation indicates mesophyll resistance which will be valuable in areas where CLM exists). ACC severity was assessed on the same 25 selections at three locations in the field in Brazil, relying on natural inoculum and conditions to cause disease. In the greenhouse experiments, the selections EEL, Bianchi/CC, Ipiguá, Olimpia, IAC 2000/1, and Ovale Siracusa consistently had the smallest diameter lesions, indicating greatest resistance, although differences in lesion diameter were small. Results from the field experiments were less conclusive, although EEL and Ovale Siracusa were consistently numerically least affected by ACC. These results indicate selections of sweet orange that might be preferable to consider in canker-prone areas in Brazil and elsewhere.

scholarly journals Bio-control efficiency of Bacillus thuringiensis (Berliner) against the citrus leaf miner, Phyllocnistis citrella Stainton (Lep., Gracillariidae) under laboratory conditions

2016 ◽  
Vol 48 (3) ◽  
pp. 355
Author(s):  
K. Saeidi ◽  
E. Saeidi
Keyword(s):  
Bacillus Thuringiensis ◽  
Plant Protection ◽  
Ornamental Plants ◽  
Leaf Miner ◽  
Phyllocnistis Citrella ◽  
Citrus Leaf ◽  
Control Efficiency ◽  
Laboratory Conditions

The citrus leaf miner, <em>Phyllocnistis citrella</em> Stainton (Lep., Gracillariidae), is one of the most destructive pest of citrus and related Rutaceae and ornamental plants in Iran. Larvae damage leaves by creating serpentine feeding mines, which have been lead to reduce yield. Resistance and toxicity problems derived from synthetic insecticides have made it necessary to find more effective and healthier alternatives; therefore, bio-insecticides (<em>i.e</em>., <em>Bacillus thuringiensis</em>) are becoming an important component in plant protection. The aim of the present study was to evaluate the efficiency of <em>B. thuringiensis</em> against <em>P. citrella</em>. Eight <em>B. thuringiensis</em> concentrations were used against <em>P. citrella</em> L3 on orange and mortality was recorded at 1, 4, 7 and 10 days after spraying. The results showed that <em>B. thuringiensis</em> significantly affected mortality of <em>P. citrella</em>. After 1, 4, 7 and 10 days of spraying 108 concentration of <em>B. thuringiensis</em> had significantly caused the highest mortality to the pest with 59.8, 68.4, 73.6 and 77.0%, respectively. Then the mortality percent decreased until it reached 6.5, 9.5, 39.3 and 46.7% at 101 concentration, respectively. In conclusion, the study indicated that <em>B. thuringiensis</em> is effective in controlling <em>P. citrella</em> under laboratory conditions.

Diversity and population dynamics of parasitoids of citrus leaf miner on acid lime in Karnataka

2018 ◽  
Vol 80 (3) ◽  
pp. 971
Author(s):  
Hanamantagouda V. Paul ◽  
Venkateshalu J. B. Gopali ◽  
Mallikarjun Awati
Keyword(s):  
Population Dynamics ◽  
Leaf Miner ◽  
Citrus Leaf ◽  
Acid Lime

scholarly journals EFEITO DE DOSES DE INSETICIDA E ADJUVANTE NO CONTROLE DE PHYLLOCNISTIS CITRELLASTAINTON (LEPIDOPTERA: GRACILLARIIDAE) EM LIMA ÁCIDA TAHITI

2018 ◽  
Vol 14 (3) ◽  
pp. 72-81
Author(s):  
Marcos Doniseti Michelotto ◽  
Willians César Carrega ◽  
Juliana Altafin Galli ◽  
Maycon Ferraz ◽  
Tamiris Marion de Souza ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Statistical Design ◽  
Principal Component ◽  
Hierarchical Cluster ◽  
Fruit Production ◽  
Leaf Miner ◽  
Control Treatment ◽  
Citrus Leaf ◽  
Acid Lime ◽  
And Control

Citrus leaf miner, Phyllocnistis citrellaStainton,1856 (Lepidoptera,Gracillariidae), is one of the main pests of the culture of acid lime Tahiti and control chemical is the primary method of control. The objective of this study was to testthe effect of insecticide treatments associated with adjuvant, in increasing the efficiency of control of citrus leaf miner in acid lime Tahiti. An experiment was installed in statistical design of randomized blocks with five treatments and four repetitions. The treatments consisted of a control treatment without application of pesticides and the use of the insecticide Ampligo® (clorantraniliprole + lambda-cialotrina) at the recommended dosage, at half the recommended dose and associated with the adjuvant. Three applications were carried out respecting the shortage period of the product. The damages of citrus leaf miner wereassessed in five branches of the central plant.Fruits wereharvest and determining the number and the mass (kg) of fruit per plant.The data were subjected to analysis of variance (F test) and the means were compared by Tukey test (P ≤ 0.05). Also the data were submitted to multivariate analysis using hierarchical cluster analysis techniques and principal component analysis (PCA). All treatments were effective in reducing the attack symptoms of citrus leaf miner, highlighting insecticide in half dosage and application of insecticide in half dosage with the adjuvant.The multivariate analysis was effective in discriminating application treatments of insecticides and adjuvant, and showa direct relationship between the citrus leaf miner and the decrease in fruit production.

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