Role of AMF on plant growth, nutrient uptake, arsenic toxicity and chlorophyll content of chili grown in arsenic amended soil

Mycorrhizal fungi have their most significant effect on plant growth and have shown to reduce arsenic contamination to chili. The present experiment was carried out to determine the influence of AMF inoculation on plant growth, nutrient uptake, arsenic toxicity, and chlorophyll content of chili grown in arsenic amended soil. Chili was grown in arsenic amended soils with or without mycorrhizal inoculation. Three levels of arsenic concentrations (10 ppm, 100 ppm, and 500 ppm) were used. The seed germination was affected more by the two treatment variables. Root length, shoot height, root fresh weight, shoot fresh weight, root dry weight, shoot dry weight were higher in AMF inoculated plants in comparison to their respective treatments and decreased significantly with the increase rate of arsenic concentrations. Less arsenic content, higher chlorophyll, and nutrient uptake were recorded in mycorrhiza inoculated chili plants. The present findings indicated that AMP inoculation not only minimize arsenic toxicity, but also can increase growth and nutrient uptake of chili. DOI: http://dx.doi.org/10.3329/bjar.v37i4.14388 Bangladesh J. Agril. Res. 37(4): 635-644, December 2012</jats:p

In-Vitro Evaluation of Plant Extracts and Fungicides Against Mycelial Growth of Sclerotium Rolfsii Causing Foot and Root Rot of Betelvine

Betelvine (Piper betle L.) is an important cash crop of Bangladesh. Foot and root rot caused by Sclerotium rolfsii is the most important disease of the crop. It decreases the production of betel leaf to a great extent. Management of the disease, the experiment was conducted to determine the effect of botanical extracts, chemical fungicides and bio-agents on in-vitro mycelium growth of S. rolfsii. Ten fungicides, 11 plant extracts and 2 bio-agents were evaluated. Among the fungicides, 100% inhibition of mycelium growth of S. rolfsii was achieved with the fungicide Provax 200. It was proved to be the best in inhibiting the radial mycelial growth of S. rolfsii. The highest growth inhibition of S. rolfsii was obtained with Garlic clove extract (96.67%) followed by Allamonda (51.12%), and bio-fungicide, Trichoderma harzianum reduced the colony diameter by 56.39% over untreated control.&#x0D; Bangladesh J. Agril. Res. 45(1): 53-64, March 2020</jats:p

Screening of Betelvine Cultivars Against Sclerotium Rolfsii Causing Foot and Root Rot Disease

Thirteen betelvine cultivars (PB 001 to PB 013) collected from different locations of Bangladesh showed remarkable variations in disease reaction to foot and root rot caused by Sclerotium rolfsii. The lowest incubation period 8 days was required for the cultivars PB 005 (BARI line), PB 006 (Misti pan), PB 009 (BARI Pan-1) and PB 010 (Bangla pan) and the highest incubation period 22 days was required for the cultivars PB 001 (Laldingi pan) and PB 013 (Gayasur pan) for appearance of 1st disease symptoms. The disease incidence ranged 8.33 to 100% at 30 days after inoculation. The lowest disease incidence was recorded in PB 001 (Laldingi pan), while the highest disease incidence was recorded from PB 002, PB 003 (Chalitaguti pan), PB 004 (Sanchi pan), PB 005, PB 006 (Misti pan), PB 007, PB 008, PB 009 (BARI Pan-1), PB 010 (Bangla pan) and PB 012 (Bhabna pan) followed by PB 011 (Jhal pan) and PB 013 (Gayasur pan). Based on incidence of foot and root rot on those cultivars, PB 001 (Laldingi) was graded as resistant, PB 011 (Jhal pan) and PB 013 (Gayasur pan) as moderately susceptible and rest of the cultivars as susceptible.&#x0D; Bangladesh J. Agril. Res. 46(1): 63-69, March 2021  </jats:p