scholarly journals Host Suitability of Three Asiatic Elms to the Elm Leaf Beetle (Xanthogaleruca luteola) (Coleoptera: Chrysomelidae)

1986 ◽  
Vol 4 (2) ◽  
pp. 44-46
Author(s):  
Richard W. Hall ◽  
Curtis E. Young
Keyword(s):  
Leaf Beetle ◽  
Host Suitability ◽  
Ulmus Pumila ◽  
Sources Of Resistance ◽  
Suitable Host ◽  
Breeding Programs ◽  
Elm Leaf Beetle ◽  
Xanthogaleruca Luteola

Larval and adult elm leaf beetle, Xanthogaleruca luteola (Muller) were fed leaves of Ulmus pumila L., U. parvifolia Jacq. and U. wilsoniana Schneid. to determine host suitability. U. pumila was a suitable host, while U. parvifolia and U. wilsoniana were found to be poor hosts. U. parvifolia and U. wilsoniana should be considered for urban plantings where elm leaf beetle defoliation is severe, and as sources of resistance in elm breeding programs.

scholarly journals Evaluation of Eleven Newly Acquired Asian Elms for Their Suitability to Adult Elm Leaf Beetle (Coleoptera: Chrysomelidae)

2001 ◽  
Vol 19 (2) ◽  
pp. 96-99
Author(s):  
Fredric Miller ◽  
George Ware
Keyword(s):  
Adult Female ◽  
Leaf Beetle ◽  
Host Suitability ◽  
Adult Males ◽  
Reference Species ◽  
Breeding Programs ◽  
Elm Leaf Beetle ◽  
Female Longevity ◽  
Males And Females ◽  
Laboratory Bioassays

Abstract Eleven newly introduced Asian elm species and one reference species were evaluated in no-choice laboratory bioassays for their suitability to the adult elm leaf beetle, Xanthogaleruca (= Pyrrhalta) luteola Müller. Adult female beetles laid significantly more eggs on U. bergmanniana, U. bergmanniana var. lasiophylla, U. castaneifolia, U. gaussenii, U. lamellosa, and U. pumila, indicating these species were the most suitable for ELB. The least suitable species for adult beetle feeding and reproduction were U. chenmoui, U. elongata, U. glaucescens, U. propinqua, U. propinqua var. suberosa, and U. szechuanica. Adult female beetles laid eggs within 7–10 days, or 4 days earlier, on the most suitable elms compared with beetles feeding on the least suitable elms. Adult male and female longevity was significantly affected by host suitability with adult males and females living nearly twice as long on the most suitable elms compared to the less suitable elms. Least suitable species U. chenmoui, U. elongata, U. glaucescens, U. propinqua, and U. szechuanica offer resistance to elm leaf beetle and show promise for future elm breeding programs.

Pectinase and cellulase activity in the digestive system of the elm leaf beetle, Xanthogaleruca luteola Muller (Coleoptera: Chrysomelidae)

2012 ◽  
Vol 15 (4) ◽  
pp. 555-561 ◽  
Author(s):  
Mohammad Vatanparast ◽  
Vahid Hosseininaveh ◽  
Mohammad Ghadamyari ◽  
Seyede Minoo Sajjadian
Keyword(s):  
Digestive System ◽  
Cellulase Activity ◽  
Leaf Beetle ◽  
Elm Leaf Beetle ◽  
Xanthogaleruca Luteola

scholarly journals Pathogenicity of two fungal pathogens on larvae of the elm leaf beetle, Xanthogaleruca luteola Muller (Coleoptera: Chrysomelidae)

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Jafar Ebrahimifar ◽  
Arsalan Jamshidnia
Keyword(s):  
Metarhizium Anisopliae ◽  
Fungal Pathogens ◽  
Insect Pests ◽  
Physiological Stress ◽  
Leaf Beetle ◽  
Control Treatment ◽  
Natural Conditions ◽  
Chemical Methods ◽  
Elm Leaf Beetle ◽  
Xanthogaleruca Luteola

Abstract Background The elm leaf beetle (ELB), Xanthogaleruca luteola Muller (Coleoptera: Chrysomelidae), is one of the most important insect pests that cause damage and physiological stress for the trees. In the present research, pathogenicity of both entomopathogenic fungi (EPF), Beauveria bassiana and Metarhizium anisopliae on the 1st, 2nd, and 3rd instar larval of ELB at the concentrations of 105, 106, 107, and 108 conidia per ml, using immersion and spray methods and were evaluated. Results The results showed that LC50 of B. bassiana in immersion and spray methods were 3.88 × 102 and 7.52 × 102 conidia/ml, while LC50 of M. anisopliae in mentioned methods were 7.05 × 102 and 11.85 × 102 conidia/ml, respectively. The highest mortality rate in both EPF was observed in the 1st instar larvae that were significantly different than the control treatment. Moreover, the highest and lowest mortality in both EPF, using immersion and spray methods, were observed at the concentrations of 108 and 105 conidia/ml, respectively. Therefore, susceptibility of 1st and 2nd larval instars was more than 1st instar larvae. Based on the findings of the present study, there was no mortality during the first 24 h, while after 2 days, the mortality was recorded and increased over time in case of both pathogens. Accordingly, B. bassiana and M. anisopliae were pathogenic on larvae of ELB. Conclusions The outputs of the study demonstrated that applications of these eco-friendly fungal pathogens with other non-chemical methods are recommended. Of course, under natural conditions, their efficiency may change; thus, more comprehensive studies are necessary.

scholarly journals Feeding and Ovipositional Responses of Adult Elm Leaf Beetle (Coleoptera: Chrysomelidae) to Simple and Complex Asian Elm Hybrid Selections

2001 ◽  
Vol 19 (3) ◽  
pp. 128-131
Author(s):  
Fredric Miller ◽  
George Ware
Keyword(s):  
Leaf Tissue ◽  
Leaf Beetle ◽  
Adult Longevity ◽  
Adult Males ◽  
Breeding Programs ◽  
Leaf Beetles ◽  
Elm Leaf Beetle ◽  
The Mean ◽  
Ulmus Davidiana ◽  
Preovipositional Period

Abstract Nine recently developed simple and complex Asian hybrids with Ulmus davidiana, U. japonica, U. parvifolia, U. pumila, U. szechuanica and/or U. wilsoniana parentage were evaluated in no-choice laboratory bioassays for their suitability for the adult elm leaf beetle, Xanthogaleruca luteola (Müller). Suitability of each biotype was defined by the mean percentage of leaf tissue removed, the mean percentage of females ovipositing, and the mean number of eggs laid per female. Adult female beetles laid significantly more eggs on U. pumila (control) and the complex hybrid U. ‘Morton Red Tip’-Danada Charm™ indicating their greater suitability for ELB. The least suitable single and complex hybrids for adult elm leaf beetles as indicated by feeding and reproduction were U. davidiana x U. ‘ Morton’ -Accolade™ and U. szechuanica x U. japonica. Females feeding on more suitable elms oviposited 3 days earlier than females feeding on less suitable elms. Adult beetle fecundity was correlated with the length of the preovipositional period but mean percentage of females ovipositing was not correlated with length of the preovipositional period. Adult males and females lived approximately 4 days longer on the more suitable elms than on less suitable elms but adult longevity was not correlated with suitability. The percentage of leaf tissue removed by adult beetles on the different biotypes was correlated with beetle fecundity. Less suitable selections of U. davidiana x U. ‘ Morton’ -Accolade™ and U. szechuanica x U. japonica seem promising for future elm breeding programs.

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