Population Fluctuations of Aphid and Leafhopper Insects Infesting Barely Plants and Some Predators, Egypt.

Al-Habshy, Aml; Amer, S. A. M.; Hashem, M.

doi:10.21608/jppp.2019.59765

Cited by 3 publications

(3 citation statements)

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“…Also, high whitefly peaks occurred during September and October on cucurbits crops (Lanjar et al, 2012). Our findings were nearly comparable to those obtained by Al-Habshy et al (2019) who reported that leafhopper and aphid peaks occurred in 3 rd week of February on barley plants. Also on pepper, the highest peak of aphid species was 165.67 individuals /plant in mid-March (Ibrahim, 2017).…”

Section: -Population Fluctuation Of Certain Piercing-sucking Pests On...supporting

confidence: 92%

Diversity of Piercing-Sucking Pests Infesting Some Plants of Solanaceae and Cucurbitaceae Families

El-Damer,,

El-Aassar,

Abolfadel

et al. 2024

Egyptian Academic Journal of Biological Sciences. A, Entomology

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Insects and plants have been living and relationship together for more million years. Cucurbitaceae and Solanaceae families were esteemed as important vegetable production in Egypt and were infested by numerous piercing-sucking pests. Recently, climatic changes led to changes in the distribution of these pests. Therefore, the diversity of Bemisia tabaci, Aphis gossypii & Myzus persicae, Empoasca decipiens and Tetranychus urticae on Solanaceae and Cucurbitaceae crops was studied during two summer seasons of 2022 and 2023 years. The obtained results show a susceptible and low resistance of whitefly and spider mite infestations, while, susceptible, moderate and low resistance were recorded with aphid and leafhopper infestations of tested hosts. Data emphasized that B. tabaci and T. urticae were the more dominant species infesting all plants. The tested piercing-sucking pests were recorded 1-3 peaks, concentrating through April-May during the two tested seasons. Data showed that the increasing of B. tabaci and T. urticae populations led to a decrease in GA3, IAA and KIN contents, and an increase in ABA contents, contrariwise, the reverse direction was found with aphids and E. decipiens populations. Moreover, a negative relationship was recorded between phenoloxidase and all tested pests except whitefly was detected a positive effect. A positive relation was reported between phytochemical components and these pests except spider mite was negative. Finally, these results offer useful and appealingly data to point out herein that the infestation rate of piercing-sucking insects must refer to the resistance degree of each cultivar to help in putting the IPM management strategy in the control programs of these pests.

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Section: -Population Fluctuation Of Certain Piercing-sucking Pests On...supporting

confidence: 92%

Diversity of Piercing-Sucking Pests Infesting Some Plants of Solanaceae and Cucurbitaceae Families

El-Damer,,

El-Aassar,

Abolfadel

et al. 2024

Egyptian Academic Journal of Biological Sciences. A, Entomology

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“…we assigned a risk from very high to relatively high (Figure 4). In particular, H. decipiens was recorded as a pest on barley [81], a crop present in the study region, and was recorded as a competent vector of 'Ca. P. asteris' phytoplasma [82].…”

Section: Why Do We Need a Proactive Approach For Phytoplasma Diseases?mentioning

confidence: 96%

Phylogenetic Triage and Risk Assessment: How to Predict Emerging Phytoplasma Diseases

Janik

Panassiti²,

Kerschbamer

et al. 2023

Biology

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Phytoplasma diseases pose a substantial threat to diverse crops of agricultural importance. Management measures are usually implemented only after the disease has already occurred. Early detection of such phytopathogens, prior to disease outbreak, has rarely been attempted, but would be highly beneficial for phytosanitary risk assessment, disease prevention and mitigation. In this study, we present the implementation of a recently proposed proactive disease management protocol (DAMA: Document, Assess, Monitor, Act) for a group of vector-borne phytopathogens. We used insect samples collected during a recent biomonitoring program in southern Germany to screen for the presence of phytoplasmas. Insects were collected with malaise traps in different agricultural settings. DNA was extracted from these mass trap samples and subjected to PCR-based phytoplasma detection and mitochondrial cytochrome c oxidase subunit I (COI) metabarcoding. Phytoplasma DNA was detected in two out of the 152 insect samples analyzed. Phytoplasma identification was performed using iPhyClassifier based on 16S rRNA gene sequence and the detected phytoplasmas were assigned to ‘Candidatus Phytoplasma asteris’-related strains. Insect species in the sample were identified by DNA metabarcoding. By using established databases, checklists, and archives, we documented historical associations and records of phytoplasmas and its hosts in the study region. For the assessment in the DAMA protocol, phylogenetic triage was performed in order to determine the risk for tri-trophic interactions (plant–insect–phytoplasma) and associated disease outbreaks in the study region. A phylogenetic heat map constitutes the basis for risk assessment and was used here to identify a minimum number of seven leafhopper species suggested to be monitored by stakeholders in this region. A proactive stance in monitoring changing patterns of association between hosts and pathogens can be a cornerstone in capabilities to prevent future phytoplasma disease outbreaks. To the best of our knowledge, this is the first time that the DAMA protocol has been applied in the field of phytopathology and vector-borne plant diseases.

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“…we assigned a risk from very high to relatively high (Figure 5). In particular, H. decipiens was recorded as a pest on barley [81], a crop present in the study region, and was recorded as a competent vector of 16SrI-B phytoplasma [82]. The genus Euscelis includes a group of species known to be associated with grasses and forbs (legumes in the order Fabales), with one species, E. incisa, that has been demonstrated to be able to acquire and inoculate several strains in the phytoplasma clade (16SrI + 16SrXII) [83].…”

Section: Nr/wmentioning

confidence: 99%

Phylogenetic Triage and Risk Assessment: How to Predict Emerging Phytoplasma Diseases

Janik¹,

Panassiti²,

Kerschbamer³

et al. 2023

Preprint

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Phytoplasma diseases pose a substantial threat to diverse crops of agricultural importance. Management measures are usually implemented only after the disease has already occurred. Early detection of such phytopathogens, prior to disease outbreak, has rarely been attempted but would be highly beneficial for phytosanitary risk assessment, disease prevention and mitigation. In this study we present the implementation of a recently proposed proactive disease management protocol (DAMA: Document, Assess, Monitor, Act) for a group of vector-borne phytopathogens. We used insect samples collected during a recent biomonitoring program in southern Germany to screen for the presence of phytoplasmas. Insects were collected with Malaise traps in different agricultural settings. DNA was extracted from these mass trap samples and subjected to PCR-based phytoplasma detection and COI sequence metabarcoding. In about 1% of the analyzed samples, phytoplasma DNA was detected. Phytoplasma group identification was performed by 16S rRNA gene sequence analysis and the detected phytoplasmas could be assigned to the 16SrI subgroups B and L. Insect species in the sample were identified by DNA metabarcoding. By using established databases, checklists, and archives, we documented historical associations and records of phytoplasmas and its hosts in the study region. For the assessment in the DAMA protocol, phylogenetic triage was performed in order to determine the risk for tri-trophic interactions (plant-insect-phytoplasma) and associated disease outbreaks in the study region. A phylogenetic heat map constitutes the basis for risk assessment and was used here to identify a minimum number of seven leafhopper species suggested to be monitored by stakeholders in this region. A proactive stance in monitoring changing patterns of association between hosts and pathogens can be a cornerstone in capabilities to prevent future phytoplasma disease outbreaks. To our knowledge, this is the first time that the DAMA protocol has been applied in the field of phytopathology and vector-borne plant diseases.

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Population Fluctuations of Aphid and Leafhopper Insects Infesting Barely Plants and Some Predators, Egypt.

Cited by 3 publications

References 0 publications

Diversity of Piercing-Sucking Pests Infesting Some Plants of Solanaceae and Cucurbitaceae Families

Diversity of Piercing-Sucking Pests Infesting Some Plants of Solanaceae and Cucurbitaceae Families

Phylogenetic Triage and Risk Assessment: How to Predict Emerging Phytoplasma Diseases

Phylogenetic Triage and Risk Assessment: How to Predict Emerging Phytoplasma Diseases

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