Determining the effects of Trichoderma harzianum and some mycorrhizal fungi on plant growth and against Rhizoctania solani Kühn in Lilium under in vivo conditions

Abstract

This study was conducted to determine the effects of microbial fertilizer containing Trichoderma harzianum Kuen 1585 (Tr), biological preparation (BRDI) (containing Glomus aggregatum, G. clarim, G. deserticola, G. intraradices, G. monosporus, G. mosseae, Gigaspora margarita and Paraglomus brasilianum), and Glomus sp. collected from agricultural areas in Aydin province on plant growth in Lilium and Rhizoctonia solani Kühn. (Rs) bulb and root rots under in vivo conditions. Study was conducted in 2 stages: at stage 1, effects of Tr, BRDI and Glomus sp. on growth of lily plants were observed and four treatments, Tr (20 g/kg), BRDI (40 cc/L), Glomus sp. (10 spore/g) and control, took place in this trial. At stage 2; effects of Tr, BRDI and Glomus sp. on Rs were observed and Rs (2%), Rs + Tr, Rs + BRDI, Rs + Glomus sp. and control treatments were used in the study. Treatments at stage 1 had significant effects on flower stalk length, length of flower bud and flower head diameter. Flowers with the longest stalk (62.03 cm) were obtained from control and this was followed by flowers harvested on lily plants treated Glomus sp. Flowers obtained from the bulbs treated Glomus sp., had the highest flower head diameter (15.27 cm). Significantly positive effects were observed on root growth of bulbs obtained from Tr and Glomus sp. treatments. Glomus sp. gave the best result, and disease severity which is 4.73 in Rs was reduced to 1.20 with Glomus sp. Similar results were also obtained in terms of fresh root weight.

Key words: Lilium, biocontrol, plant growth, Trichoderma sp., Rhizoctonia spp.