A good product to break the dormancy of plant ---- Cyanamide

Brief Introduction:

Cyanamide is a kind of the dormancy-breaking agent, which can inhibit the action of hydrogen peroxidase in plant and speed up recycling of PPP of plants to stimulate the generation of some basic substance of plants, growth of plants and stop the dormancy of plants. It can cause the following beneficial effects on treated plants: advanced budbreak, flowering by 2-4 weeks; more uniform budbreak; increased percentage of budbreak; shortened flowering period and reduction in the number of picks. The treated fruits turn to be bigger, more uniform and sweeter. Also the harvest of fruits can be advanced by 2-3 weeks and the yield can be increased.

The results of application:

Darong is the first manufacturer of Cyanamide in China. During the period of 2000-2002, it has made many experiments of the dormancy breaking on grapes, cherry and kiwifruits in Ningxia, Shandong, Dalian and Shanxi etc. In Ningxia, the grapes were treated by cyanamide with three concentrations of 1.5%, 2.5% and 3.5%. The cyanamide was sprayed with motorized knapsack sprayer. The results showed: the budbreak could be advanced by 17-19 days, fruit growth by 16-18 days and fruit maturity by 14-16 days. The percentage of budbreak could be increased by 5.7%, 13.3% and 10.3% respectively and meanwhile the yield increase was 10.5%, 17.4% and 15.1%. The net income per mu could be up by RMB236-341. In city of Talian of Shandong, the grapes were treated with cyanamide with three concentrations of 1.0%, 3.0% and 5.0%. The results showed: advanced flowering periods by more than 8 days, increased weight of fruits by 6.8-7.1 grams, the yield increase by14.3%. Comparison in color, hardness and content of solid substance proved that breaking dormancy by applying cyanamide solution on grapes could not degrade the quality of fruits.

Methods of application:

Name of crops	Dilution	Methods
Table grapes Wine grapes	10-20 times	Paint or spray
Kiwifruits	8-12.5 times	Paint or spray
Pome fruits (apple and pear)	12.5-25 times	Paint or spray
Stone fruits (peach, nectarine, cherry, apricot, plum)	12.5-100 times	Paint or spray

Timing of application:
   The time of application depends mainly on the agroclimatic conditions, the crop and the objective of use.

1) In order to increase the percentage of budbreak, treating 2 to 3 weeks prior to the time of natural budbreak onto the dormant canes. (The time of budbreak varies year to year) 2) For advanced budbreak, in subtropical conditions, it is usually applied 45 to 30 days prior to the time of natural budbreak. Under tropical conditions it is usually applied immediately after pruning. 3) Crops in the shelter, such as cherry, grapes, can be treated with cyanamide 2-6 weeks prior to the time of natural bud break.

Precautions:

1) Wear protective clothing and eye shield when applying cyanamide. 2) Drink wine or eating food with alcohol are forbidden 24 hours before and after the operation. 3) Clean eyes and mouth with clean water, wash face and hands with soap after operation. 4) Cyanamide is a kind of weedicide and defoliating agent. Be careful not to spray on other plants nearby. 5) Avoid late frost when applying cyanamide. 6) Harmful to bees, don't spray on the plants. 7) Avoid direct sunlight, and temperature for storage is under 20. Don't store it together with acid and alkali. Keep it away from food or the places that the children can reach.