Rabbiteye Blueberry Field Trials with the Growth Regulator CPPU

2004 ◽  
pp. 193-202
Keyword(s):  
Growth Regulator ◽  
Field Trials

Response of winter barley cultivars to nitrogen and a plant growth regulator in relation to lodging

1991 ◽  
Vol 116 (2) ◽  
pp. 191-200 ◽  
Author(s):  
E. M. White
Keyword(s):  
Plant Growth ◽  
Plant Height ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Unit Length ◽  
Dry Weight ◽  
Field Trials ◽  
Winter Barley ◽  
Barley Cultivars ◽  
Damage Susceptibility

SUMMARYApplications of nitrogen and a plant growth regulator (mepiquat chloride and ethephon) were used to manipulate stem structure and induce differing degrees of damage due to leaning and lodging in six cultivars of winter barley grown in Belfast, UK, in 1986/87. Weighted incidences of leaning and lodging were combined to give an index indicating damage susceptibility of the cultivars. The index was very high (70) in Pipkin and ranged between 1 and 18 in the other cultivars. Differences between cultivars in number of internodes, plant height and stem weight did not explain their differences in resistance to damage. However, dry weight per unit length ranged from 2·35 and 2·34 mg/mm in the strongest cultivars, Panda and Jennifer, respectively, to 1·75 mg/mm in the weakest cultivar, Pipkin.Nitrogen application increased plant height but did not affect dry weight/main stem, so that dry weight/unit length of stem decreased. The growth regulator treatments reduced plant height and although dry weight/stem did not decrease significantly, dry weight/unit length of stem was similar in treated and untreated plots.Dry weight/unit length has potential as an objective indicator of straw strength in winter barley cultivars and could be used in cultivar evaluation in the absence of damage in field trials.

Rabbiteye Blueberry Field Trials with the Growth Regulator CPPU

2004 ◽  
Vol 3 (1-2) ◽  
pp. 183-191 ◽  
Author(s):  
D. Scott Nesmith ◽  
H. Marcus Adair
Keyword(s):  
Growth Regulator ◽  
Field Trials

AN INSECT GROWTH REGULATOR (PRO-DRONE) FOR EFFECTIVE MANAGEMENT OF THE RED IMPORTED FIRE ANT (HYMENOPTERA: FORMICIDAE)1,2,3

1985 ◽  
Vol 20 (2) ◽  
pp. 194-198 ◽  
Author(s):  
Sherman A. Phillips ◽  
David M. Claborn ◽  
Harlan G. Thorvilson
Keyword(s):  
Growth Regulator ◽  
Large Scale ◽  
Field Trials ◽  
Insect Growth Regulator ◽  
Fire Ant ◽  
Red Imported Fire Ant ◽  
Insect Growth ◽  
Large Scale Field ◽  
Solenopsis Invicta Buren ◽  
Imported Fire Ant

Pro-Drone, an insect growth regulator (IGR) with juvenile hormone activity, was aerially applied twice at the rates of 11.86 g AI/ha in large-scale field trials for control of the red imported fire ant, Solenopsis invicta Buren. Although Pro-Drone applications produced no significant effect at 3- and 8-months posttreatment, the IGR significantly reduced fire ant infestation after 10 months in southeastern Texas. This product represents the first registered, aerially applied IGR effective against the red imported fire ant.

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