The apical 1-cm hypocotyl of dark-grown ;Clark' soybean (Glycine max [L.] Merr.) seedlings produced ethylene at rates of 7 to 11 nanoliters per hour per gram when attached to the cotyledons. Such physiologically active rates occurred prior to the deceleration of hypocotyl elongation caused by the temperature of 25 C.Daily exposure of the etiolated seedlings to red light promoted hypocotyl elong...

Fumigation of soybean leaves (Glycine max [L.] Merr. with ozone caused stippling and silvering at the same time that large accumulations of the isoflavonoid compounds daidzein, coumestrol, and sojagol occurred. Nitrogen dioxide and sulfur dioxide caused lesser accumulation of the isoflavonoids, and peroxyacetyl nitrate did not result in significant accumulation. Visible toxicity and chemical ch...

the soybean cyst nematode (heterodera glycine ichinohe, scn) is one of the most serious yields limiting pathogen on soybean (glycine max (l.) merr) which is found in many soybean–growing regions throughout the world. applying of resistant sources is one of the efficient measures to manage this nematode. in this study, reaction of 63 soybean lines to the soybean cyst nematode were evaluated in f...

Multiple herbicide-resistant waterhemp ( Amaranthus tuberculatus (Moq.) J.D. Sauer) has limited herbicide options for Iowa row crop production. Soybean Glycine max (L.) Merr.) cultivars and corn Zea mays L.) hybrids resistant to 2,4-D, dicamba, glufosinate have provided more management. A probability-based survey of fields was conducted in fall 2019 wherein seeds were collected their susceptibi...

Soybean [Glycine max (L.) Merr.], an economically important dicot legume, is a member of the family Fabaceae and belongs to the genus Glycine Willd. Based on classical and molecular taxonomy, the genus Glycine has been divided into two subgenera; the subgenus Soja (Moench) F.J. Hermann includes soybean and its wild annual progenitor G. soja Sieb. & Zucc. Both species contain 2n = 40 chromosomes...

Abstract Oviposition, development and survivorship of Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) were evaluated on soybean and garden bean under laboratory conditions of 26.0 +/- 0.5 degrees C, 70 - 80% RH and a photoperiod of 14:10 (L:D). B. tabaci deposited more eggs and survivorship of nymphs was significantly greater in a choice-test on soybean, Glycine max L. (Merr.) (Fabeles: Fab...

the essential oil extracted from the epicarp of citrus sinensis exhibited absolute fungitoxicity against soybean’s fungus as alternaria alternate, aspergillus niger, cercospora kikuchii, chaetomium spp., cladosporium cladosporioides, curvularia lunata, fusarium roseum, macrophomina phaseolina, penicillium italicum, phomopsisspp. rhizoctonia solani, and sclerotium rolfsii. it is very difficult t...