Effect of different soil and clove treatments in the control of white rot of garlic

Abstract

Soil solarisation was consistently efficacious in reducing inoculum density to undetectable levels in a field naturally-infested with Sclerotium cepivorum. This treatment delayed epidemic onset of white rot of garlic 2-3 months as compared with the untreated control or the inoculation of planting furrows with Glomus intraradices. Furthermore, significant reductions of disease incidence and of the standardised AUDPC were also observed in solarised plots, resulting in quantitative and qualitative yield improvement. Similar effects were observed in plots planted with tebuconazole-treated cloves, confirming previous results, whereas Trichoderma harzianum was ineffective as a biocontrol agent, when applied to planting furrows. The inoculation of plots with G. intraradices before planting, in three consecutive years, was neither effective for disease control nor on the development of garlic, although the root systems of garlic plants from all the experimental treatments were heavily mycorrhizal at harvest, indicating the presence of native arbuscular mycorrhizal propagules in the soil and their survival after soil solarisation.

Integrated Management of Garli c White Rot (Sclerotium cepivorum Berk)Using Some Fungicides and Antifungal Trichoderma Species

“…This is based on the fact that 0.01-0.1 g sclerotia/g of soil resulted in infection of less than or equal to 85-100% and 100% incidence of disease in onion and garlic plants, respectively. This is sclerotia germination stimulants (diallyl disulfides, DADS), composted onion waste, host resistant were also found moderately effective at varying degrees [14][15][16]. It has been found that systemic as well as non-systemic fungicides significantly reduced garlic white rot disease development and resulted in improved garlic yield.…”

A friendly-environmental strategy: application of arbuscular mycorrhizal fungi to ornamental plants for plant growth and garden landscape

“…Perhaps AMF compensate the damage of diseases and insect through improvement of plant health, root structure, and nutrient acquisition (Majewska et al, 2017). However, there was no significant difference between G. intraradices-colonized plants and non-AMF-colonized plants infected with white rot (Prados-Ligeo., 2002). AMF also inhibited the damage of nematode in menthol mint (Ratti et al, 2000), and reduced the damage of Pratylenchus coffea (Elsen et al, 2003).…”

Reduction of Stromatinia cepivora inocula and control of white rot disease in onion and garlic crops by repeated soil applications with sclerotial germination stimulants

“…Furthermore, developing a new variety having with appropriate bulb quality and disease resistance is difficult (Earnshaw et al., 2000). Other methods used to reduce Allium white rot severity such as, fungicides (Zewide et al., 2007), soil flooding (Banks and Edgington, 1989), addition of composts (Entwistle, 1990), solarization and mulching (Satour et al., 1989), incorporation of cruciferous residues (Smolinska, 2000), application of antagonists (Elshahawy et al., 2017a), and sclerotial mycoparasites (Elshahawy et al., 2017b), have been found to be moderately effective to varying degrees (Prados-Ligero et al., 2002). An effective control method has been obtained with soil partial-sterilizers such as methyl bromide, dazomet and vapam which destroy the sclerotia (Adams and Johnston, 1983), but such treatments are expensive.…”