Alatae production and population increase of aphid vectors on virus-infected host plants

Oecologia ◽  
1992 ◽  
Vol 92 (1) ◽  
pp. 65-70 ◽  
Author(s):  
M. J. Blua ◽  
T. M. Perring
Keyword(s):  
Host Plants ◽  
Infected Host ◽  
Population Increase ◽  
Aphid Vectors

Fitness costs associated with spinetoram resistance in Spodoptera frugiperda is driven by host plants

2021 ◽  
Author(s):  
Rubens Hideo Kanno ◽  
Aline Guidolin ◽  
Fernando Padovez ◽  
Juliana Rodrigues ◽  
Celso Omoto
Keyword(s):  
Insecticide Resistance ◽  
Spodoptera Frugiperda ◽  
Host Plants ◽  
Agricultural Landscape ◽  
Growth Parameters ◽  
Resistance Management ◽  
Population Increase ◽  
Relative Fitness ◽  
Fitness Costs ◽  
Cotton Plants

Insecticide resistance is usually associated with fitness costs. The magnitude of fitness costs is affected by environmental and ecological factors. Here, we explored how host plants could affect fitness costs associated with insecticide resistance. Initially, spinetoram-resistant (RR) and susceptible (SS) strains of Spodoptera frugiperda were selected using F2 screen from a population collected in Sao Desiderio, Bahia State, Brazil in 2018. Besides de RR and SS strains, fitness costs were also assessed for a heterozygous strain (RS). Life-history traits were evaluated to estimate population growth parameters of neonate larvae of each strain fed on corn, soybean and cotton plants. Compared to the SS strain, the relative fitness of the RR strain, based on intrinsic rate of population increase, was 1.06, 0.84 and 0.67 on plants of corn, soybean and cotton respectively. The relative fitness of the RS strain was similar to the SS strain regardless the host plant, suggesting a recessive fitness cost. No differences were found between the strains fed on corn plants. The larval development time was greater for RR strain fed on soybean and cotton plants compared to RS and SS strain. Low survival rate and fecundity of the RR strain were found when larvae fed on plants of soybean and cotton. The results of this study demonstrated that fitness costs of spinetoram resistance in S. frugiperda depend strongly on the host plants that S. frugiperda larvae fed on. Such information can be used to design resistance management strategies considering the host plants of the agricultural landscape. Keywords: fall armyworm; spinosyns; insect resistance management; relative fitness.

Enantioselective Antiphytoviral Activity of l-(α-carboxyalkyl)-4,5-dimethyl imidazol-3-oxides in Systemically Infected Host Plants

1993 ◽  
Vol 137 (4) ◽  
pp. 309-316
Author(s):  
Ute Bauer ◽  
S. Kluge ◽  
P. Nuhn ◽  
P. Stengerand ◽  
H. Lettau
Keyword(s):  
Host Plants ◽  
Infected Host

scholarly journals SIGS vs HIGS: a study on the efficacy of two dsRNA delivery strategies to silence Fusarium FgCYP51 genes in infected host and non‐host plants

2019 ◽  
Vol 20 (12) ◽  
pp. 1636-1644 ◽  
Author(s):  
Aline Koch ◽  
Lisa Höfle ◽  
Bernhard Timo Werner ◽  
Jafargholi Imani ◽  
Alexandra Schmidt ◽  
...  
Keyword(s):  
Host Plants ◽  
Infected Host ◽  
Delivery Strategies

Serological detection of plant viruses in their aphid vectors and host plants in Tunisia

EPPO Bulletin ◽  
2002 ◽  
Vol 32 (3) ◽  
pp. 495-498 ◽  
Author(s):  
F. Raboudi ◽  
A. Ben Moussa ◽  
H. Makni ◽  
M. Marrakchi ◽  
M. Makni
Keyword(s):  
Host Plants ◽  
Plant Viruses ◽  
Serological Detection ◽  
Aphid Vectors

scholarly journals Plant Viruses Transmitted in Two Different Modes Produce Differing Effects on Small RNA-Mediated Processes in Their Aphid Vector

2019 ◽  
Vol 3 (1) ◽  
pp. 71-81 ◽  
Author(s):  
Patricia V. Pinheiro ◽  
Jennifer R. Wilson ◽  
Yi Xu ◽  
Yi Zheng ◽  
Ana Rita Rebelo ◽  
...  
Keyword(s):  
Small Rna ◽  
Myzus Persicae ◽  
Host Plants ◽  
Potato Virus Y ◽  
Plant Viruses ◽  
Buchnera Aphidicola ◽  
Antiviral Immune Response ◽  
Aphid Vectors ◽  
Transcriptional Gene Regulation ◽  
Leafroll Virus

Transmission of plant viruses by aphids involves multitrophic interactions among host plants, aphid vectors, and plant viruses. Here, we used small RNA (sRNA) sequencing to visualize the sRNA response of Myzus persicae to two plant viruses that M. persicae transmits in different modes: the nonpersistent Potato virus Y (PVY) versus the persistent Potato leafroll virus (PLRV). Aphids exposed to PLRV produced significantly less 22 mers aligned to the aphid genome, and an abundance of 26 to 27 mers, many of which were predicted to be piRNA. Additionally, expression of Buchnera aphidicola tRNA-derived sRNAs was influenced by PLRV and, to a lesser extent, PVY, suggesting that plant viruses alter the aphid-endosymbiont relationship. Finally, aphids exposed to PLRV-infected plants generated an abundance of unusually long sRNAs and a reduced number of 22 mers against an aphid virus, Myzus persicae densovirus (MpDNV) and had higher MpDNV titer. Expression of the PLRV silencing suppressor P0 in plants recapitulated the increase in MpDNV titer in the absence of PLRV infection. Our results show that plant viruses transmitted in two different modes cause distinct effects on their vector with regards to post-transcriptional gene regulation, symbiosis with Buchnera, and the antiviral immune response of aphids to an aphid-infecting densovirus.

scholarly journals Host Plants Indirectly Influence Plant Virus Transmission by Altering Gut Cysteine Protease Activity of Aphid Vectors

2016 ◽  
Vol 16 (4 suppl 1) ◽  
pp. S230-S243 ◽  
Author(s):  
Patricia V. Pinheiro ◽  
Murad Ghanim ◽  
Mariko Alexander ◽  
Ana Rita Rebelo ◽  
Rogerio S. Santos ◽  
...  
Keyword(s):  
Cysteine Protease ◽  
Protease Activity ◽  
Plant Virus ◽  
Host Plants ◽  
Virus Transmission ◽  
Cysteine Protease Activity ◽  
Aphid Vectors

PCR–RFLP-based typing for differentiation of Tomato yellow leaf curl virus (TYLCV) genotypes from infected host plants in Korea

Virus Genes ◽  
2013 ◽  
Vol 47 (3) ◽  
pp. 579-583
Author(s):  
Sung Oh ◽  
Seongdae Kim ◽  
Nagarajan Vinod ◽  
Jung Mo Koo ◽  
Kyung Min Jang ◽  
...  
Keyword(s):  
Host Plants ◽  
Tomato Yellow Leaf ◽  
Infected Host ◽  
Yellow Leaf ◽  
Pcr Rflp ◽  
Leaf Curl Virus ◽  
Leaf Curl
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