Method for treating plants or plant parts

1. A method of inhibiting an ethylene response in plants or plant parts comprising the step of contacting said plants or plant parts with at least one composition comprising at least one double bond adducted cyclopropene compound,

wherein said double bond adducted cyclopropene compound has the formula of

wherein:

a) each R 1 , R 2 , R 3 and R 4 is independently selected from the group consisting of H and a chemical group of the formula:

-(L) n -Z

wherein:

i) n is an integer from 1 to 12;

ii) each L is independently selected from the group consisting of D1, D2, E, and J, wherein:

D1 is of the formula:

D2 is of the formula:

E is of the formula:

J is of the formula:

wherein:

 A) each X and Y is independently a chemical group of the formula:

-(L) m -Z;

 and

 B) m is an integer from 0 to 8; and

 C) no more than two D2 or E groups are adjacent to each other and no J groups are adjacent to each other;

iii) each Z is independently selected from the group consisting of hydrogen, halo, cyano, nitro, nitroso, azido, chlorate, bromate, iodate, isocyanato, isocyanido, isothiocyanato, pentafluorothio, and a chemical group G, wherein G is a 4 to 14 membered ring system; and

iv) the total number of heteroatoms in -(L) n -Z is from 0 to 6; and

b) the total number of non-hydrogen atoms in said compound is 50 or less, with the proviso that each said double bond adducted cyclopropene compound that has said structure 3 has R 2 that is hydrogen.

2. The method of claim 1 , wherein said compound inhibits an ethylene response in at least one of said plants or plant parts.

3. The method of claim 2 , wherein said ethylene response is one or more response selected from the group consisting of: ripening or senescence of flowers, fruits, or vegetables; abscission of foliage, flowers, or fruit; shortening of life of ornamental plants, cut flowers, shrubbery, seeds, or dormant seedlings; inhibition of growth; stimulation of growth; auxin activity; inhibition of terminal growth; control of apical dominance; increase in branching; increase in tillering; changing the morphology of plants; modifying the susceptibility to plant pathogens; changing bio-chemical compositions; abortion or inhibition of flowering or seed development; lodging effects; stimulation of seed germination; breaking of dormancy; hormone effects; and epinasty effects.

4. The method of claim 1 , wherein said double bond adducted cyclopropene compound comprises one or more compound having said structure 1.

5. The method of claim 1 , wherein said double bond adducted cyclopropene compound comprises one or more compound having said structure 2.

6. The method of claim 1 , wherein said double bond adducted cyclopropene compound comprises one or more compound having said structure 3.

7. The method of claim 1 , wherein every said R 2 is a hydrogen.

8. The method of claim 1 , wherein said plants or plant parts comprise harvested fruits and vegetables.

9. The method of claim 1 , wherein said double bond adducted cyclopropene compound is encapsulated in a molecular encapsulating agent.

10. The method of claim 1 , wherein said treating is performed by contacting said double bond adducted cyclopropene compound in gaseous form to said plants or plant parts.