scholarly journals Greenhouse Screening of Capsicum Accessions for Resistance to Green Peach Aphid (Myzus persicae)

HortScience ◽  
2004 ◽  
Vol 39 (6) ◽  
pp. 1332-1335 ◽  
Author(s):  
James D. Frantz ◽  
Jeffrey Gardner ◽  
Michael P. Hoffmann ◽  
Molly M. Jahn
Keyword(s):  
Myzus Persicae ◽  
Green Peach Aphid ◽  
Resistance Mechanism ◽  
Cotton Aphid ◽  
Sources Of Resistance ◽  
Leaf Pubescence ◽  
Aphid Infestation ◽  
Greenhouse Screening ◽  
Damage Tolerant ◽  
Considerable Damage

A greenhouse screen for resistance to green peach aphid (GPA) [Myzus persicae (Sulzer)] was done using 50 pepper (Capsicum spp.) accessions. There were significant differences among accessions for damage rating, number of aphids per plant and number of aphids per leaf. Leaf pubescence, the basis of a reported nonpreference resistance mechanism to green peach aphid infestation, failed to protect pepper accessions from GPA colonization and damage. Sources of resistance and tolerance to cotton aphid [Aphis gossypi (Glover)] supported high levels of green peach aphid infestation and exhibited considerable damage. Although no accessions provided strong resistance to aphid colonization evident by significantly reduced numbers of aphids, several commercial varieties and sources of virus resistance exhibited strong tolerance to GPA, evident as reduced damage. Tolerant varieties could be an important component in integrated pest management of green peach aphid.

scholarly journals The green peach aphid Myzus persicae perform better on pre-infested Chinese cabbage Brassica pekinensis by enhancing host plant nutritional quality

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
He-He Cao ◽  
Hui-Ru Liu ◽  
Zhan-Feng Zhang ◽  
Tong-Xian Liu
Keyword(s):  
Chinese Cabbage ◽  
Myzus Persicae ◽  
Green Peach Aphid ◽  
Marker Genes ◽  
Plant Leaves ◽  
Resistance Level ◽  
Aphid Infestation ◽  
Phloem Sap ◽  
Brassica Pekinensis ◽  
Plant Nutritional Quality

Abstract The green peach aphid, Myzus persicae Sulzer, is a notorious pest on vegetables, which often aggregates in high densities on crop leaves. In this study, we investigated whether M. persicae could suppress the resistance level of Chinese cabbage Brassica pekinensis. M. persicae performed better in terms of weight gain (~33% increase) and population growth (~110% increase) when feeding on previously infested (pre-infested) Chinese cabbage compared with those on non-infested plants. However, when given a choice, 64% of the aphids preferred to settle on non-infested leaves, while 29% of aphids chose pre-infested leaves that had a 2.9 times higher concentration of glucosinolates. Aphid feeding significantly enhanced the amino acid:sugar ratio of phloem sap and the absolute amino acid concentration in plant leaves. Aphid infestation significantly increased the expression levels of salicylic acid (SA) marker genes, while it had marginal effects on the expression of jasmonate marker genes. Exogenously applied SA or methyl jasmonate had no significant effects on M. persicae performance, although these chemicals increased glucosinolates concentration in plant leaves. M. persicae infestation increase amino acid:sugar ratio and activate plant defenses, but aphid performed better on pre-infested plants, suggesting that both nutrition and toxics should be considered in insect-plant interaction.

Study of Wild Solanum Species to Identify Sources of Resistance Against the Green Peach Aphid, Myzus Persicae (Sulzer)

2012 ◽  
Vol 90 (1) ◽  
pp. 66-70 ◽  
Author(s):  
Alireza Askarianzadeh ◽  
A. Nicholas E. Birch ◽  
Gavin Ramsay ◽  
Mehrnoosh Minaeimoghadam
Keyword(s):  
Myzus Persicae ◽  
Green Peach Aphid ◽  
Solanum Species ◽  
Sources Of Resistance ◽  
Wild Solanum Species ◽  
Wild Solanum

scholarly journals Metabolomic and transcriptomic analyses of Prunus davidiana reveal the key resistance compound to green peach aphid, betulin

2021 ◽  
Author(s):  
Junxiu Wang ◽  
Yong Li ◽  
Xinwei Wang ◽  
Ke Cao ◽  
Gengrui Zhu ◽  
...  
Keyword(s):  
Transcriptome Analysis ◽  
Defense Mechanism ◽  
Green Peach Aphid ◽  
Resistance Mechanism ◽  
Wild Relative ◽  
Biosynthesis Pathway ◽  
Aphid Infestation ◽  
Expression Of Genes ◽  
Segregating Population ◽  
Prunus Davidiana

Abstract Prunus davidiana, a close wild relative of the cultivated peach, has been identified as having a strong resistance to Myzus persicae Sülzer (green peach aphid, GPA), one of the major pests of peach. However, the resistance mechanism of P. davidiana remains unclear. In this study, combined analysis of metabolome and transcriptome was conducted using aphid-resistant (R-32) and aphid-susceptible (S-27) lines, from a segregating population, to investigate the defense mechanism of P. davidiana. These results showed that R-32 continuously accumulated higher levels of betulin than S-27 during aphid infestation. Besides, betulin displayed a strong toxic effect on GPA. Transcriptome analysis revealed that the expression of genes involved in the betulin biosynthesis pathway responded highly to GPA infestation, especially CYP716A1. Our results demonstrate that betulin play an important role in the mechanism of resistance of P. davidiana to GPA.

scholarly journals Direct and Indirect Effect of Myzus Persicae Infestation on Buildup of Whitefly (Bemisia tabaci) in Tomato Crop under Laboratory Conditions

2020 ◽  
pp. 1-8
Author(s):  
Khadija Javed ◽  
Humayun Javed ◽  
Dewen Qiu
Keyword(s):  
Bemisia Tabaci ◽  
Indirect Effect ◽  
Myzus Persicae ◽  
Green Peach Aphid ◽  
Tomato Crop ◽  
Aphid Infestation ◽  
Tomato Plants ◽  
Factors Affecting ◽  
Whitefly Population ◽  
Negative Effect

The tomato crop is affected by a number of pests in the world as well as in China and Pakistan. The whitefly (Bemisia tabaci) is considered a very serious and damaging pest of tomato crop along with many other vegetables and field crops. Population buildup of whitefly is affected by many factors, including biotic and a biotic. One of the factors affecting the whitefly population in the tomato crop is green peach aphid (Myzus persicae) infestation before the whitefly attack. This project designed to note the direct and indirect effect of Myzus persicae infestation on the population setup of whitefly in tomato crops. The results revealed that whitefly prefers tomato plants without having aphids on them (choice) and can be settled on the tomato plants also when there are aphids present (no choice). The period after aphid infestation have a negative effect on the whitefly population, and the density of aphids/leaf has also influenced the whitefly population.

Green peach aphid and potato leafroll virus: transmission and control

2020 ◽  
Author(s):  
R.A. Bagrov ◽  
◽  
V.I. Leunov
Keyword(s):  
Myzus Persicae ◽  
Green Peach Aphid ◽  
Virus Transmission ◽  
Potato Leafroll Virus ◽  
Factors Affecting ◽  
Potato Viruses ◽  
Tuber Necrosis ◽  
Aphid Vectors ◽  
Leafroll Virus ◽  
And Control

The mechanisms of transmission of potato viruses from plants to aphid vectors and from aphids to uninfected plants are described, including the example of the green peach aphid (Myzus persicae, GPA). Factors affecting the spreading of tuber necrosis and its manifestation on plants infected with potato leafroll virus (PLRV) are discussed. Recommendations for PLRV and GPA control in the field are given.

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