Related Experiment Video
Updated: Jan 29, 2026

An Effective Inoculation Method for Phytophthora capsici on Black Pepper Plants
Published on: September 16, 2022
Field Application of Calcium to Reduce Phytophthora Stem Rot of Soybean, and Calcium Distribution in Plants
T Sugimoto1, K Watanabe2, S Yoshida3
1Hyogo Agricultural Institute for Agriculture, Forestry and Fisheries, 1533 Minamino-oka, Befu, Kasai, Hyogo 679-0198, Japan.
Abstract:
The effect of calcium compounds [Ca(HCOO)2-A and Ca(NO3)2] on the incidence of Phytophthora stem rot of soybean (Glycine max) cv. Tanbakuro was investigated in the field. Disease incidence in control plants in three fields naturally infested with Phytophthora sojae ranged from 11.7 to 52.0% at 140 days after transplanting. Independent of the pathotype diversity, 4 and 10 mM of the calcium compounds applied twice (prior to transplanting and 14 days after transplanting) significantly suppressed disease incidence and delayed onset. Ca(HCOO)2-A (Suicaru) was more effective than calcium nitrate for reducing disease incidence. In most cases, the calcium amendments increased plant height, number of nodes and pods, and seed yields, and reduced low-quality seeds. Scanning electron microscopy with fresh samples showed increased accumulation of calcium crystals around the cambium and xylem elements of soybean plants treated with 10-mM Ca(HCOO)2-A and Ca(NO3)2. Mycelial penetration was inhibited at these sites. These results indicated that calcium-rich areas may be more resistant to invasion by P. sojae, and the calcium crystals may play an important role in calcium ion storage and its availability for those tissues to maintain long-term field resistance.
More Related Videos
Related Concept Videos
Skeleton and Calcium Homeostasis
Applications of Normal Distribution
The heights of 15 to 18-year-old males from Chile from 1984 to 1985 followed a normal distribution. The mean height is 172.36...
Roles of Electrolytes: Calcium and Phosphate
The calcium concentration in blood plasma is primarily...
Feedback Regulation of Calcium Concentration
Various transmembrane receptors, such as G protein-coupled receptors (GPCRs), elicit a response to extracellular signals by increasing cytosolic calcium. Activated GPCRs...
Antiepileptic Drugs: Calcium Channel Blockers
Calcium channel blockers exert their antiepileptic effects by targeting T-type calcium channels, which are integral to transmitting nerve signals in the central nervous system. These channels allow the passage of calcium ions, which are vital for neuronal communication. By inhibiting T-type calcium channels, calcium channel blockers effectively reduce the release of neurotransmitters and...
Induced Electric Fields: Applications

