Host preference, population growth and injuries assessment ofPolyphagotarsonemus latus(banks) (ACARI: Tarsonemidae) onCapsicum annuumL. Genotypes

Abstract

Despite the continued efforts on the search for different genotypes, Capsicum annuum (L.) is quite susceptible to attack by pest arthropods, especially the broad mite Polyphagotarsonemus latus Banks. Thus, the host preference, population growth and the injuries assessment of P. latus was studied on six C. annuum genotypes used in Brazil (Atlantis, California Wonder, Impact, Palloma, Rubia and Tendence). Host preference was accessed in choice tests, pairing the several genotypes, and the population growth was observed through non-choice tests in laboratory. The injuries assessments were evaluated in the greenhouse, comparing the injury level among the six genotypes. The results indicate that California Wonder and Palloma genotypes were more preferred by P. latus, and Impact and Tendence were less preferred. P. latus presented positive population growth rates (ri) on all the genotypes, however, Palloma and California Wonder showed the highest values of population growth rate (ri = 0.344 and ri = 0.340, respectively), while Impact had the lowest value (ri = 0.281). All the evaluated C. annuum genotypes showed low tolerance to P. latus and exhibited several injuries, but there was no statistical difference between them. California Wonder had the highest average number of mites/leaf (57.15), while Impact and Tendence obtained the lowest values (36.67 and 35.12, respectively) at the end of the evaluation period. The total average of injuries notes at the end of the bioassay did not differ between the genotypes. The number of mites/leaf was growing for the injury scale to the note 3.0, but when the injury scale approached the note 4.0, there was observed a decrease in the number of mites/leaf for all the genotypes.

Host preference, acaricides effects and population growth of Polyphagotarsonemus latus (Banks) (Acari: Tarsonemidae) on white and colored cotton cultivars

“…On Capsicum annuum L. genotypes P. latus showed a preference for the hybrid Martha 19 . Also, the host preference from P. latus by Palloma and California Wonder genotypes of C. annuum were observed when compared to the genotypes Impacto and Tendence 20 . In addition, wild species of potato ( Solanum berthaultii L., S. polyadenium Greenmam and S. tarijense Hawkes) presented antixenosis resistance to P. latus 21 …”

“…19 Also, the host preference from P. latus by Palloma and California Wonder genotypes of C. annuum were observed when compared to the genotypes Impacto and Tendence. 20 In addition, wild species of potato (Solanum berthaultii L., S. polyadenium Greenmam and S. tarijense Hawkes) presented antixenosis resistance to P. latus. 21 Besides non-preference mechanism, antibiosis effects on populations may play an important role in plant resistance and pest control.…”

Lethal and sublethal effects of pesticides in the management of Polyphagotarsonemus latus (Banks) (Acari: Tarsonemidae) on Capsicum annuum L.

“…Although other control techniques are important components of integrated pest management (IPM) programmes, such as plant resistance by the use of different cultivars, the development of C. annuum resistant genotypes to P. latus has been difficult to access . The use of acaricides appears to be the major control tactic for the management of this mite.…”

“…Although other control techniques are important components of integrated pest management (IPM) programmes, such as plant resistance by the use of different cultivars, the development of C. annuum resistant genotypes to P. latus has been difficult to access. 32 The use of acaricides appears to be the major control tactic for the management of this mite. In general, for crops that require a large number of applications throughout the growing season, acaricide rotation is technically recommended, with different chemical groups and modes of action, in order to delay the selection of mite resistant populations.…”

Resistance of Lima Bean (Phaseolus lunatus L.) to the Red Spider Mite Tetranychus neocaledonicus (Acari: Tetranychidae)

“…Some studies aiming to select host plant resistance to pest mites have been carried out in recent decades. Sources of resistance to Tetranychus evansi Baker & Pritchard (Acari: Tetranychidae) were investigated in tomato varieties ( Silva et al, 1992 ); strawberry and vines sources were tested for T. urticae Koch (Acari: Tetranychidae) resistance ( Lourenção et al, 2000 ; Valadão et al, 2012 ; Breda et al, 2016 ) evaluated sweet pepper genotypes’ resistance to the broad mite, Polyphagotarsonemus latus (Banks) (Acari: Tarsonemidae). Silva et al (2011) evaluated Rubber tree clones’ resistance to Eriophyiidae and Tenuipalpidae mites, among other studies.…”