Rhizosphere microorganisms affected by soil solarization and cover cropping in Capsicum annuum and Phaseolus lunatus agroecosystems

Kokalis-Burelle, Nancy; McSorley, Robert; Wang, Koon‐Hui; Saha, Shubin; McGovern, Robert J.

doi:10.1016/j.apsoil.2017.06.001

Cited by 25 publications

(13 citation statements)

References 24 publications

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“…Since B. odoriphaga larvae mainly live below ground at depth of 0 to 5 cm [6], our results indicate that B. odoriphaga could be managed by some methods to keep the soil (0-5 cm in depth) above 37 • C for 4 h, such as soil solarization, plastic films, etc. Soil solarization has been used in the hot season to treat the soil, before planting, in order to eliminate soil-borne diseases and weeds [42,43]. Our previous study firstly reported that when the 0.12-mm-thick light blue anti-dropping film was covered on the soil surface, the soil temperature dependably increased and rapidly killed all stages of B. odoriphaga [31].…”

Section: Discussionmentioning

confidence: 99%

Effects of Non-Lethal High-Temperature Stress on Bradysia odoriphaga (Diptera: Sciaridae) Larval Development and Offspring

Shi

Zhang

et al. 2020

Insects

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Throughout China, the dipteran pest Bradysia odoriphaga significantly reduces Chinese chive production; therefore, identifying conditions that influence its growth and development is crucial for developing ecological regulation strategies. In this study, different non-lethal high temperatures and treatment durations were used to stress the third-instar larvae of B. odoriphaga, and the effects of this treatment on their growth and offspring were recorded and analyzed. The results showed that the average larval mortality increased with increased temperature and prolonged exposure times. After stress treatment at 40 °C for 2 h, 100% of larvae died within 5 days, which was not significantly different from the 5-day average larval mortality (90.66%) after stress at 37 °C for 4 h, but significantly higher than the 5-day average larval mortality (72.00%) after stress at 40 °C for 1 h. After 5 days, all still-living larvae could pupate, and there was no significant difference in average pupal period after pupation. However, the eclosion rate of subsequent pupae decreased with increased temperature and prolonged exposure times, and were only 43.00% and 42.73% after larvae were stressed at 37 °C for 4 h and 40 °C for 1 h, respectively. After eclosion into adults, there was no significant difference in the lifespan of unmated female adults, while the lifespan of unmated male adults was significantly reduced to 1.67 d and 2 d after larvae were stressed at 37 °C for 4 h and 40 °C for 1 h, respectively. However, there was no significant difference in male and female adult longevity after mating. There was no significant difference in oviposition or egg hatchability. This indicates that non-lethal high temperature at 37 °C for 4 h can hinder development and allow control of B. odoriphaga. There is great potential for non-lethal high temperature to be applied in the field to control agricultural pests.

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Section: Discussionmentioning

confidence: 99%

Effects of Non-Lethal High-Temperature Stress on Bradysia odoriphaga (Diptera: Sciaridae) Larval Development and Offspring

Shi

Zhang

et al. 2020

Insects

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“…The fumigation resulted in a severe reduction in beneficial soil microbiota, which later supported the outbreak by Pythium spp. Kokalis-Burelle et al [ 104 ] also observed Pythium epidemics in methyl bromide-treated plots of pepper plants in subsequent years, which were attributed to the biological vacuum created by methyl bromide fumigation. Due to the fewer soil microorganisms present in the soil, no competition was present to Pythium .…”

Section: Control Measuresmentioning

confidence: 99%

Pythium Damping-Off and Root Rot of Capsicum annuum L.: Impacts, Diagnosis, and Management

Arora

Sharma

et al. 2021

Microorganisms

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Capsicum annuum L. is a significant horticulture crop known for its pungent varieties and used as a spice. The pungent character in the plant, known as capsaicinoid, has been discovered to have various health benefits. However, its production has been affected due to various exogenous stresses, including diseases caused by a soil-borne pathogen, Pythium spp. predominantly affecting the Capsicum plant in younger stages and causing damping-off, this pathogen can incite root rot in later plant growth stages. Due to the involvement of multiple Pythium spp. and their capability to disperse through various routes, their detection and diagnosis have become crucial. However, the quest for a point-of-care technology is still far from over. The use of an integrated approach with cultural and biological techniques for the management of Pythium spp. can be the best and most sustainable alternative to the traditionally used and hazardous chemical approach. The lack of race-specific resistance genes against Pythium spp. can be compensated with the candidate quantitative trait loci (QTL) genes in C. annuum L. This review will focus on the epidemiological factors playing a major role in disease spread, the currently available diagnostics in species identification, and the management strategies with a special emphasis on Pythium spp. causing damping-off and root rot in different cultivars of C. annuum L.

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“…Several methods have been developed for the management of Pythium -induced diseases. In arid and hot areas of the world, covering soil with transparent polyethylene sheets for a period of 2–8 weeks (solarization) has been effective in reducing populations of Pythium and some other fungal species in soil (Farraq & Fotouh, 2010; Kokalis-Burelle et al, 2017). Biofumigation has also shown to be effective, but it is less frequently used (Deadman, Al-Hasani & Al-Sa’di, 2006).…”

Section: Introductionmentioning

confidence: 99%

Aspergillus terreus obtained from mangrove exhibits antagonistic activities against Pythium aphanidermatum-induced damping-off of cucumber

Al-Shibli

Dobretsov

Al-Nabhani

et al. 2019

PeerJ

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A study was conducted to investigate the potential of Aspergillus terreus obtained from Avicennia marina mangrove roots in inhibiting Pythium aphanidermatum and damping-off disease of cucumber. Aspergillus terreus exhibited in vitro inhibition of Pythium aphanidermatum growth. Electron microscope examination revealed that the antagonistic fungal isolate resulted in shrinking and groves in Pythium hypha. When Aspergillus terreus culture filtrate was added to Pythium aphanidermatum, it resulted in a significant increase (by 73%) in electrolyte leakage from Pythium hypha compared to the control, as well as significant reduction (by 71%) in oospore production. The Aspergillus terreus culture was also found to produce a cellulase enzyme, which is suggested to be involved in the antagonism against Pythium aphanidermatum. Adding Aspergillus terreus to soil infested with Pythium aphanidermatum significantly reduced percent mortality in cucumber seedlings by 70%. Aspergillus terreus, when applied alone on cucumber seedlings, did not show any suppressive effects on cucumber growth (length and fresh and dry weight). This appears to be the first report of isolation from mangrove of Aspergillus terreus with antagonistic activity against Pythium aphanidermatum-induced damping-off of cucumber. The study indicates that fungal isolates obtained from marine environments may serve as potential biocontrol agents against some plant pathogens.

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Rhizosphere microorganisms affected by soil solarization and cover cropping in Capsicum annuum and Phaseolus lunatus agroecosystems

Cited by 25 publications

References 24 publications

Effects of Non-Lethal High-Temperature Stress on Bradysia odoriphaga (Diptera: Sciaridae) Larval Development and Offspring

Effects of Non-Lethal High-Temperature Stress on Bradysia odoriphaga (Diptera: Sciaridae) Larval Development and Offspring

Pythium Damping-Off and Root Rot of Capsicum annuum L.: Impacts, Diagnosis, and Management

Aspergillus terreus obtained from mangrove exhibits antagonistic activities against Pythium aphanidermatum-induced damping-off of cucumber

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