Growth Regulator Residues, Analysis for Maleic Hydrazide. Part I. Detection and Determination in Dried Green Tobacco Leaves and Suckers. Part II. Determination and Persistence in Soils

1962 ◽  
Vol 10 (6) ◽  
pp. 453-455 ◽  
Author(s):  
I. Hoffman ◽  
E. V. Parups ◽  
R. B. Carson
Keyword(s):  
Growth Regulator ◽  
Maleic Hydrazide ◽  
Tobacco Leaves

scholarly journals Determination of Free and Bound Maleic Hydrazide Residues in Tobacco by High Performance Liquid Chromatography

1994 ◽  
Vol 16 (2) ◽  
pp. 57-64 ◽  
Author(s):  
BS Dattilo ◽  
S Gallo ◽  
G Lionetti ◽  
SG Rossi
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Quantitative Determination ◽  
High Performance ◽  
Maleic Hydrazide ◽  
Dilute Solution ◽  
Tobacco Leaves ◽  
Qualitative And Quantitative ◽  
Curve Method

AbstractA new method is described for the qualitative and quantitative determination of both free and bound maleic hydrazide residues in tobacco leaves and cigarette filler by high performance liquid chromatography. Analyses were carried out by hydrolyzing samples of ground tobacco with 4 N hydrochloric acid for 40 minutes under reflux followed by sample chromatography, running isocratic elutions with a dilute solution of phosphoric acid. The quantitative determination of maleic hydrazide was performed by light absorption at 320 nm, by the calibration curve method. Recoveries of maleic hydrazide added to tobacco samples were greater than 90 %. The detection limit of the method, determined on ground tobacco leaves, was at least 5 ppm. The results obtained by this procedure and by the ISO standard method no. 4876 are in good accordance.

The control of sucker growth in tobacco by growth substances and mineral oils.

1953 ◽  
Vol 4 (4) ◽  
pp. 390
Author(s):  
J Calvert
Keyword(s):  
Growth Regulator ◽  
Indoleacetic Acid ◽  
Maleic Hydrazide ◽  
Growth Substances ◽  
Mineral Oils ◽  
Highly Effective

Indoleacetic acid ranging in concentration from 50 to 10,000 p.p.m. significantly reduced the growth of suckers on plants which had had the apical leaves and inflorescence excised. Five mineral oils significantly reduced the suckering in tobacco grown in the glass-house. Twelve mineral oils tested in north Queensland under conditions similar to commercial growing were all highly effective in reducing sucker growth. As the concentration of indoleacetic acid increased, the epinastic effect on the leaves became more pronounced. The mineral oils did not produce epinasty. No pathological reactions were observed with any of the treatments. Maleic hydrazide was the only growth regulator used in the field that significantly reduced sucker growth.

Plant metabolic studies of the growth regulator maleic hydrazide

1995 ◽  
Vol 43 (10) ◽  
pp. 2713-2715 ◽  
Author(s):  
Dieter Komossa ◽  
Heinrich Jr. Sandermann
Keyword(s):  
Growth Regulator ◽  
Maleic Hydrazide ◽  
Metabolic Studies

scholarly journals Metabolic Studies of the Growth Regulator, Maleic Hydrazide

1997 ◽  
Vol 17 (3) ◽  
pp. 67-74
Author(s):  
M Haas ◽  
P Schröder ◽  
D Komoßa ◽  
H Sandermann ◽  
RG May
Keyword(s):  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Maleic Hydrazide ◽  
Cell Suspension Cultures ◽  
White Rot ◽  
White Rot Fungus ◽  
Low Degree ◽  
First Time ◽  
Acid Labile

AbstractThe metabolism of the plant growth regulator maleic hydrazide (MH) has been studied in sterile cell suspension cultures of tobacco, soybean, maize and wheat under standardized conditions. Maleic hydrazide was converted to itsO-b-D-glucoside in yields between 9.0 % (tobacco) 15.0 % (soybean), 5.1 % (maize) and 2.2 % (wheat) respectively. This glucoside was completely cleaved under simulated conditions (pH 1, 37°C, 24 h) of a ruminant stomach. From these results it is concluded that MH-O-b-D-glucoside (MHG) belongs to a small group of acid-labile pesticide conjugates (11). The participation of a glucosyltransferase (GT) (EC 2.4.1-) in this conjugation reaction of MH was demonstrated in vitro for the first time. In addition, up to 18 % of the applied maleic hydrazide became associated with nonextractable residues (NER) in soybean, whereas in tobacco only 0.2 % could be detected in this fraction. The residue from soybean cells was solubilized only to a low degree (about 3 %) under simulated stomach conditions, but up to 20 % by the white rot fungusPhanerochaetechrysosporium.

scholarly journals Influence of Maleic Hydrazide on Ripening of Tobacco Leaves

1956 ◽  
Vol 25 (2) ◽  
pp. 96-98
Author(s):  
Yoshiharu SHIMIZU ◽  
Hideo IWAZAKI
Keyword(s):  
Maleic Hydrazide ◽  
Tobacco Leaves

scholarly journals Nitrogen Fertilizer and Growth Regulator Impacts on Tuber Deformity, Rot, and Yield for Russet Potatoes

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Mark S. Reiter ◽  
Steven L. Rideout ◽  
Joshua H. Freeman
Keyword(s):  
Growth Regulator ◽  
Maleic Hydrazide ◽  
Sandy Loam ◽  
Total Yield ◽  
Soft Rot ◽  
Atlantic Region ◽  
N Application ◽  
Application Timing ◽  
Current Production ◽  
Production Practices

Potatoes (Solanum tuberosum) are an important high-value commodity for producers in the Mid-Atlantic Region. Current production recommendations were based on white potatoes, and practices for Russet potatoes have not been researched in this region. The objective of this study was to test impacts of N rate (0, 67, 134, 201, and 268 kg N ha−1), N application timing (100% applied with planter, 2-way split (30% with planter and 70% band applied approximately 30 days after planting at dragoff), and three-way split (30% with planter, 50% band applied prior to drag-off, and 20% band applied at first sight of bloom)), and additions of the growth regulator maleic hydrazide (MH-30). We tested “Goldrush” and “Norkotah” Russet potato varieties on marketability, total yield, tuber deformity, and tuber soft rot incidence for sandy loam soils in the Mid-Atlantic. Overall, year variations were significant with substantial rots (up to 86.5%) occurring in year 3. Maleic hydrazide and N application timing had little consistent effect on any tested parameter. Nitrogen rate and variety factors had the greatest impacts on deformity, tuber rots, and yields for Russet potatoes in the Mid-Atlantic Region with 134 kg N ha−1producing the highest total yields in 2009 and 2010. If tuber rots can be controlled, both “Goldrush” and “Norkotah” are acceptable varieties under the Mid-Atlantic production practices.

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