Dear Ntombifuthi

Seed treatment of maize (Zea mays L.) with the fungicides captan, etridiazole, or thiram (1.5 g/kg seed), or combinations of captan + benodanil, captan + metalaxyl, or benomyl + fenaminosulf (0.75 + 0.75 g/kg) increased numbers of emerged seedlings in a field trial by 37–50%. In a rolled towel test, seedlings were protected from soil-borne pathogens by captan or captafol (0.5 g/kg seed), etridiazole (1.0 g/kg) or thiram (0.5 g/kg). Fusarium oxysporum Schlecht. and Trichoderma koningii Oudem were the pathogenic fungi most commonly isolated from field grown seedlings. Maize seedlings were more susceptible to these fungi when growing at 15°C than at higher temperatures. Isolates differed in their pathogenicity to seedlings, and some isolates of F. oxysporum and an isolate of Thanatephorus cucumeris (Frank) Donk increased seedling growth.

Also, experiments were conducted to determine the efficacy of thiram and other fungicides as seed disinfestants for the control of teliospores of Ustilago maydis. Exposure to thiram inhibited teliospore germination only temporarily. Bawsan 'L', containing the fungicide 2-(thiocyanomethylthio) benzothiazole (TCMTB), was the most effective chemical tested. It completely inhibited the germination of teliospores with 18 h exposure, and it also had a fumigant action. Tests with maize seed contaminated with teliospores indicated that complete control could be achieved after treatment with 100 ml Bawsan 'L'/100 kg of seed and that, at this rate of application, seed could be stored for at least 12 months without any deleterious effect on seedling emergence.

http://www.publish.csiro.au/an/EA9860187

Seed treatments are added to maize seeds to protect seedlings against soil and seed borne diseases and pests, to enhance germination and to promote seedling emergence during the critical first few weeks after planting.

Please have a look at these RG links.

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Your question "What are the treatments of maize seed ?" is too unspecific. It can be specific treatment for pre-packaged seeds, or specific treatment needed for your experiments. For example, sterilization of your seeds for tissue-culturing. You need to be more specific.