Integration between Compost, Trichoderma harzianum and Essential Oils for Controlling Peanut Crown Rot under Field Conditions

Abstract

The effect of T. harzianum and some essential oils alone or in combination with compost on the peanut crown rot disease under field conditions was evaluated. Under laboratory conditions, results indicated that all concentrations of essential oils significantly reduced the growth of A. niger. Complete reduction was obtained with thyme and lemongrass oils at 0.5%. All T. harzianum isolates significantly reduced the growth of A. niger. The highest reduction was obtained with isolate no. 1 which reduced the growth by 81.1%. Under field conditions, results indicated that all treatments significantly reduced the peanut crown rot disease. The highest reduction was obtained with combined treatments (compost + T. harzianum + thyme and compost + T. harzianum + lemongrass) which reduced the disease incidence at both pre- and post-emergence growth stages, respectively. Similar trend corresponding to the previous treatments significantly increased the peanut yield which calculated as an increase in yield more than 75.0 and 80.0 during two growing seasons, respectively. It could be suggested that combined treatment between biocompost and essential oils might be used commercially for controlling peanut crown rot disease under field conditions.

Eco-Friendly Management of Root-Knot Nematode and Root Rot Disease Infecting Pepper Plants by Application Compost and Tea Compost

“…General averages of egg hatching reduction percent of unsterilized and sterilized compost extract were 65.98% and 54.02%, respectively, while the parallel values for juvenile mortality were 52.33 and 45.9%, respectively. These results are in agreement with those reported by The effectiveness of compost tea on percent reduction of fungal growth and the low reproduction of nematodes in this study were probably due to secondary substances produced by compost tea, as previously mentioned (Darby et al, 2006;Abdel-Kader et al, 2013;Rizvi et al, 2018) such as phenolic compounds, steroids, triterpenes, anthraquinones, flavonoid heterosides, saponin heterosides, condensed tannins, hydrolyzable tannins, and sugars that are exuded from the examined compost materials. Some of these substances, such as terpene compoundssand flavonoid glycosides, have proven nematicidal and antifungal activity (Du et al, 2011;Lopes et al, 2019).…”

Vineyard Compost Supplemented with Trichoderma Harzianum T78 Improve Saline Soil Quality

“…The main mechanism that is supposed to be adopted by T78 is the accumulation of specific intercellular substances that act as metabolically‐neutral osmolytes (Peng et al ., ). This type of information about the influence of external water relations on metabolic activities of Trichoderma strains is essential for planning their application in biocontrol strategies (Harman, ) by themselves or in combination with organic amendments (Abdel‐Kader, ).…”

Evaluation of antagonists against Macrophomina phaseolina causing root rot of groundnut

“…x 100 Root rot incidence in inoculated control (%) various fungal antagonists on soil-borne plant pathogens were reported previously by many investigators (Abdel-Kader et al, 2013;El-Moughy et al, 2012). Bhagat and Pan (2010) screened 12 isolates of Trichoderma against Rhizoctonia solani causing root and collar rot of Frenchbean (Phaseolus vulgaris L.) in vitro by dual culture tests and found that all the isolates significantly inhibited the mycelial growth of the pathogen.…”