The activity of bacteria B125, PT60 (Enterobacter cloacae) and PZ9 (Bacillus sp.) was examined in field cultivation of lettuce and cucumber. In the experiments with lettuce the mixture of PZ9 + B125 was applied for transplants production by drenching of growing medium with bacterial suspension or mixing with alginate microcapsules. Controls were water or thiram. The best transplants growth was obtained with bacterial suspension. However, after transplanting to field the yield and health of treated lettuce did not differ compared to untreated control. The microcapsules and thiram inhibited growth of young plants and reduced lettuce yield. Thiram increased plant infection by Sclerotinia sclerotiorum. In the experiments with cucumber bacteria PT60 was applied as suspension for plant drenching or in form of microcapsules for seed coating. The microcapsules reduced cucumber germination, but the yield did not differ between treatments. PT60 significantly reduced the symptoms of downy mildew.

Aktywność bakterii B125, PT60 (Enterobacter cloacae) oraz PZ9 (Bacillus sp.) była badana w polowej uprawie sałaty i ogórka. W doświadczeniach z sałatą użyto mieszankę bakterii PZ9 + B125 na etapie produkcji rozsady do podlewania roślin lub w postaci mikrokapsuł alginianowych dodanych do podłoża. Jako kontrolę stosowano wodę lub tiuram. Najlepszy wzrost rozsady uzyskano po zastosowaniu zawiesiny bakterii. Jednak po przesadzeniu w pole, plon i zdrowotność roślin nie różniły się istotnie w porównaniu do nietraktowanej kontroli. Mikrokapsuły z bakteriami PZ9 i B125 oraz tiuram hamowały wzrost młodych roślin i zmniejszały plon sałaty. Tiuram zwiększał porażenie roślin przez Sclerotinia sclerotiorum. W doświadczeniach z ogórkami bakterie PT60 stosowano jako zawiesinę do podlewania roślin w polu lub w formie mikrokapsuł do zaprawiania nasion. Mikrokapsuły obniżały wschody roślin, ale plony nie różniły się między obiektami. PT60 powodował istotną redukcję nasilenia mączniaka rzekomego na roślinach.

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