Plant protecting and regulating compositions – Plant growth regulating compositions – Desuckering or sucker control agent
Reexamination Certificate
1999-10-21
2001-06-12
Clardy, S. Mark (Department: 1616)
Plant protecting and regulating compositions
Plant growth regulating compositions
Desuckering or sucker control agent
Reexamination Certificate
active
06245712
ABSTRACT:
BACKGROUND
Suckers in Virginia tobacco are chemically controlled by using two main types of substances: contacts (fatty alcohols, such as n-decanol) and systemics, such as maleic hydrazide (MH).
Fatty alcohols are generally very effective in killing small suckers, but they are characterized by a disgusting smell, which can be very annoying for farmers during the distribution on the cultivars, causing nausea, vomiting, suspension of work, etc. Furthermore people living in the surrounding areas may complain about the smell and limit the tobacco producer's ability to use this valuable chemical pinching agent in cultivation of his tobacco.
To overcome this problem new formulations have been developed containing n-decanol and a specialized polyoxyethylene sorbitan monooleate. These new formulations are effective at reducing odor without altering their biological activity and above all, without causing any negative side-effect on the characteristics of flue-cured tobacco leaves, which might be detrimental for cigarette manufacture. Attempts have surprisingly not been successful directed to modifying the n-decanol formulations to contain some flavoring substances which are supposed to mask the smell of fatty alcohols.
SUMMARY OF THE INVENTION
One aspect of this invention is a method of inhibiting the growth of suckers in tobacco plants which comprises applying to said tobacco plants after topping an effective amount for inhibiting tobacco sucker growth of an aqueous solution containing as active ingredient from about 10% to about 90% by weight of a saturated C
6
to C
18
fatty alcohol and about 90% to about 10% of polyoxyethylene sorbitan ester comprising a mixture of mono, di and triesters.
Another aspect of this invention is disclosed wherein said polyoxyethylene sorbitan ester comprises a polyoxyethylene sorbitan ester having the formula
wherein w+x+y+z is between 6 and 25.
Another aspect of this invention is disclosed wherein said fatty alcohol is N-decanol.
Another aspect of this invention is disclosed wherein said fatty alcohol is N-octanol.
Another aspect of this invention is disclosed wherein said fatty alcohol constituent comprises a mixture consisting essentially of N-octanol and N-decanol.
Another aspect of this invention is disclosed wherein w+x+y+z is between 14 and 22
Another aspect of this invention is disclosed wherein w+x+y+z is between 16 and 20
Another aspect of this invention is disclosed wherein said polyoxyethylene sorbitan ester is a condensation reaction product of ethylene oxide and sorbitan fatty acids wherein the fatty acids are reacted in molar excess of from 6 to 25 moles per mole of ethylene oxide.
Another aspect of this invention is disclosed wherein said solution includes an emulsifying agent, wetting agent, spreaders, solubilizers, stickers, foam suppressors and drift control agents.
Another aspect of this invention is disclosed liquid composition for inhibiting the growth of tobacco suckers comprising an effective amount for inhibiting tobacco sucker growth of an aqueous solution containing as active ingredient from about 10% to about 90% by weight of a saturated C
6
to C
18
fatty alcohol and about 90% to about 10% of polyoxyethylene sorbitan ester comprising a mixture of mono, di and triesters. Another aspect of this invention is disclosed wherein said saturated fatty alcohol comprises N-decanol. Another aspect of this invention is disclosed wherein said saturated fatty alcohol constituent comprises a mixture consisting essentially of N-octanol and N-decanol. Another aspect of this invention is disclosed further including an emulsifying agent, wetting agent, spreaders, solubilizers, stickers, foam suppressors and drift control agents.
Another aspect of this invention is disclosed a liquid composition for inhibiting the growth of tobacco suckers as recited above further including a wetting agent.
Another aspect of this invention is disclosed further comprising the steps of sequentially and alternately contacting the crop buds with said aqueous solution and a growth regulator.
Another aspect of this invention is disclosed further comprising applying said aqueous solution selectively to the suckering zone. Another aspect of this invention is disclosed further comprising applying said aqueous solution at a rate of from about 0.3 to about 20 ml per cultivar.
Another aspect of this invention is a method for the inhibition of secondary growth in azaleas comprising applying topically an effective amount of the aqueous solution.
Another aspect of this invention is disclosed is the inhibition of plant growth by topical application of chemical agent to meristematic tissue, the improvement which comprises the utilization of an effective amount of a composition comprising as active ingredient from about 10% to about 90% by weight of a saturated C
6
to C
18
fatty alcohol and about 90% to about 10% of polyoxyethylene sorbitan ester having the structure
wherein w+x+y+z is between 6 and 25.
REFERENCES:
patent: 5424272 (1995-06-01), Chang
patent: 1502757 (1978-03-01), None
Folchi Bruno
McKelvie Maria J.
Wiley Robert P.
Clardy S. Mark
Pryor Alton
Thompson Raymond D.
Uniroyal Chemical Company, Inc.
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