Before you can answer that question, tell us about the positive (and negative) controls you ran, as well as the conditions (temperature, for example - did you run a gradient?). This will allow you to draw a conclusion from the PCR reaction you performed.
We always use the following primer combination: for the ITS1 region primer pairs ITS5/ITS2, for the ITS2 region primer pairs ITS3/ITS4 described by Hinrikson et al. JCM 2005 43:2092.
You can go with the ITS1 and ITS4 primers as they are the Universal primers for the Fungal Identification. Here is the procedure i m writing for you for 10uL PCR reaction.
PCR Method
10x Buffer=1uL
25mM Mgcl2=0.6uL
dNTP mix= 0.2uL
Taq= 0.1 (I used Banglure GENE COMPANY)
PF(ITS1)=0.2uL (10pM Cnoc)
PR(ITS4)=0.2uL (10pM Cnoc)
MilliQ WATER=7.1uL
Cyclic Conditions
Initial Denaturation
94 Degree-5 Min
94 Degree-30 Sec
55 Degree-45 Sec
72 Degree-1 Min
35 Cycles
72 Degree-5 Min
4 Degree=Infinity (If you are going to run the PCT at Night Time)
Please check your DNA Extraction carefully. Aspergillus niger produces a lot of pigments which usually inhibit PCR amplification. Use PCR enhancers and check + and - controls during PCR runs.