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Fungicide Sensitivity among Isolates of Colletotrichum truncatum and Fusarium incarnatum-equiseti Species Complex Infecting Bell Pepper in Trinidad 원문보기

The plant pathology journal, v.33 no.2, 2017년, pp.118 - 124  

Ramdial, Hema (Department of Life Sciences, Faculty of Science and Technology, The University of the West Indies) ,  Abreu, Kathryn De (Department of Life Sciences, Faculty of Science and Technology, The University of the West Indies) ,  Rampersad, Sephra N. (Department of Life Sciences, Faculty of Science and Technology, The University of the West Indies)

Abstract AI-Helper 아이콘AI-Helper

Bell pepper is an economically important crop worldwide; however, production is restricted by a number of fungal diseases that cause significant yield loss. Chemical control is the most common approach adopted by growers to manage a number of these diseases. Monitoring for the development to resista...

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제안 방법

  • truncatum). Four replicates of each fungicide concentration were used for each isolate and the experiment was conducted twice. Cultures were prepared by removing a 4-mm3 block of mycelia from the leading edge of an actively growing 7-day-old culture and placing it mycelium-side-down in the center of fungicide-amended media.
  • Therefore, it is necessary to screen different chemistries to optimize chemical use for management of different fungal diseases in bell pepper. This study was carried out to determine the efficacy of various fungicides with different modes of action to control 71 isolates belonging to two fungal species that affect bell pepper in Trinidad
  • , 2015). This study was, therefore, conducted to determine the sensitivity of Fusarium and Colletotrichum isolates infecting bell pepper to fungicides with different modes of action.

대상 데이터

  • 0 μg/ ml of fungicide. A total of 71 isolates were screened (N = 38 FIESC; N = 33 C. truncatum). Four replicates of each fungicide concentration were used for each isolate and the experiment was conducted twice.

데이터처리

  • values for the fungal isolates according to field location. Analysis of variance (ANOVA) of the LogEC50 values (mycelia growth of the control vs the Log10 of the fungicide concentration) was carried out (Minitab v.17; Minitab, State College, PA, USA). A comparison of means LogEC50 values using Fisher’s least significant difference and Tukey’s multiple comparison of means tests was also done.
  • Linear regression analyses were conducted to determine the LogEC50 values for the fungal isolates according to field location. Analysis of variance (ANOVA) of the LogEC50 values (mycelia growth of the control vs the Log10 of the fungicide concentration) was carried out (Minitab v.
  • values for each of the two fungal species were determined based on ANOVA analyses (Table 1, 2). The t-tests were also conducted to compare the LogEC50 values of FIESC isolates against those of C. truncatum isolates. With respect to FIESC, there was no significant influence of fungicide on LogEC50 values (P = 0.
  • The t-tests were also performed to compare LogEC50 values of each species according to fungicide and field location. Equal variances were assumed for all tests, with 95% confidence interval.

이론/모형

  • Fresh mycelium was harvested from cultures grown in potato dextrose broth and used in genomic DNA extraction using the cetyl trimethylammonium bromide (CTAB) extraction method. PCR amplification was carried out using two primers pairs that target the ITS1-5.
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