Hartley, D.E. This distortion occurred on the bracts of some, but not all, plants drenched with one dose of Bonzi applied at 3 ppm and 5 fl. Bonzi Label Bonzi Label.pdf — PDF document, 208 kB (213,661 bytes) This project received support from the North Carolina Department of Agriculture and Consumer Services as part of the Specialty Crops Block Grant Program. Drench solutions should be prepared to supply 1 or 2 ppm a.i. Second, the growth during this time is vegetative (i.e. Connect with UMass Extension Greenhouse Crops & Floriculture Program: UMass Research and Education Center Farms, Conservation Assessment Prioritization System (CAPS), Extension Risk Management/Crop Insurance Education, North American Aquatic Connectivity Collaborative, Civil Rights and Non-Discrimination Information. However, foliar sprays of 25-50 ppm on poinsettia were nearly as effective as drenches and provided reasonable growth control. Poinsettia Bonsai from Xmas gift : Today I am going to show you how to make poinsettia bonsai from Xmas / Christmas tree. It is used primarily as a soil drench application. oz./pot. A-Rest, B-Nine, Bonzi, Cycocel, and Sumagic are plant growth regulators (PGRs) labelled for use on poinsettias. Growers can try to control late season stretch by applying a very dilute drench of A-Rest or Bonzi. At this stage coloring and bract expansion were just beginning. He will explore the Internet with you as your very own friend and sidekick! The table accompanying this article, taken from the 2003-2004 edition of New England Floricultural Recommendations, provides the rates for use in New England and describes the specific conditions and methods for applying each PGR. Some of the reasons for stretch include: missed early season PGR applications, periods of unusually favorable growing conditions, or elongation due to too close spacing or low light intensity due to cloudy weather. The amount of active ingredient applied in each dose are shown in Table 1. Bonzi® est un régulateur de croissance qui a de nombreuses applications. PGRs must be applied uniformly in order to cause uniform inhibition to plant growth. At this time 5-6 bracts were fully colored and close to full expansion while many smaller leaves were in earlier stages of coloring and expansion. Many growers report too tall or "stretching" poinsettias late in the season. Therefore, it is probably worthwhile to leave at least 10 representative plants untreated to evaluate the effectiveness of the low concentration drench treatments. Subscribe. after the Bonzi drench the plants generally grow an additional ½ – 1"/1.27 – 2.54 cm depending on the drench rate used. Cycocel sprays have been the traditional growth retardant used on poinsettias. PGR use can be reduced or eliminated by the starting with good quality cuttings, use of a tighter schedule, and by providing the plants with as much light as possible by proper spacing and maximizing light transmission. Poinsettias (potted). This explains why at any ppm level different application volumes may affect plant growth to a different degree and why inaccurate volume measurement during drenching leads to uneven results. Effect ofBonzi drench applications on plant and bract size of 'Red Sails' poinsettia. DO … In 1988, research conducted by Dr. Jim Barrett at theUniversity of Florida demonstrated the potential of Bonzi (paclobutrazol)drenches for poinsettia height control. Best of all, he's FREE! Section 13, pp.75-77 in: H.K. Proper spacing is a key. Very low rates of paclobutrazol are drenched on the poinsettia crop as often as once a week, in combination with graphical tracking, to achieve optimal crop height, with little or no risk of reducing bract size. My results demonstrate that Bonzi applied as a drench at low concentrations during the early stages of bract expansion and coloring is effective at suppressing the height and diameter of poinsettia. No bract distortion was evident in any of the other treatments. Bonzi peut être utilisé dans les poinsettias pendanttoute la période de culture et permet d’obtenir une couleur de feuille riche, Our environmental conditions create a truly unique set of problems that must be overcome to produce a high quality product. Using low levels of PGRs after the start of short days may help control stretch in these situations. When used as directed, Bonzi produces no phytotoxic effects. Plants potted in July and early August often end up too tall because of the extra time for vegetative growth between planting, pinching, and the initiation of flower buds. generally cortez varieties are resistant to late-season stretch. The volume of the drench together with ppm determines mg a.i./pot (Table 1). Their leaves are normally quite large (up to 15cm) but reduce well with standard bonsai techniques to around 1/3 normal size. Micro drenches of Bonzi can be used at any stage of production, and it will not decrease the bracts to an unsellable state. Keeps you informed of late breaking news! However, some recent recommendations (Hammer, 1996; Moore, 1996) suggest that growth medium drench applications of very low concentrations (1-2 ppm) of Bonzi or A-Rest can be used late season stretch of poinsettia with minimal affect on bract diameter. Bract size. Don't know if they can be wired at all - stems and branches are very fragile and snap extremely easy. Rates for Bonzi, Paczol Drenching Calculations- Rick Yates 2.20.09 . An unexpected outcome was that differences in height among Bonzi-treated plants did not result from different concentrations, drench volumes or number of doses. Read on for common pitfalls and how to avoid them. Keep poinsettias away from warm or cold drafts from radiators, air registers or open doors and windows. oz./pot) so results are normally uniform. PGR use is most likely on cultivars such as 'Success', and 'Monet'. Roll, Eds. Very low rates of Bonzi are drenched on the poinsettia crop as often as once a week in combination with graphical tracking to achieve optimal crop height, with little or no risk of reducing bract size. Treatment Plant height (cmz) Plant diameter (cm) Bractdiameter (cm) Bract internode length (cm) Bonzi Drench (ppm) (fl. 59(14):42, 44, 46-50. Starting in late October, higher drench rates can be used to provide stronger hold if needed, with a slight reduction in bract size. Most of the poinsettia cultivars introduced within the last 10 years require less PGR than earlier types. All of the causes of excess height interact to affect final plant height. Traditionally it has been recommended that plant growth regulators (PGRs) not be applied after mid-October or the start of short days (Hartley and Wilfret, 1992). Use Bonzi PGR on container ornamentals in greenhouses, shade houses and nurseries. Production de poinsettias – Phase 4. À l’approche du mois de décembre, nous avons probablement fait tout le nécessaire pour que les poinsettias soient prêts à amorcer la phase finale de leur cycle de croissance. Overall, bract diameter of was reduced by increases in Bonzi concentration, drench volume, and number of doses. For example, six-inch pots containing one pinched plant should be spaced 13x14" (i.e., a minimum of 1.2 sq. All plants were treated twice in September with a foliar spray of B-Nine and Cycocel. Tips on the use of chemical growth regulators on floriculture crops. POINSETTIAS - DRENCH APPLICATION General Information GENERAL INFORMATION Bonzi is a plant growth regulator for use on ornamental plants grown in containers in nurseries, greenhouses, shadehouses, and interiorscapes. The dosage rate is 4 fl. Please Log in or Create an account to join the conversation. of A-Rest or Bonzi. He even has the ability to compare prices on the products you love and help you save money! Plant size. of PGR solution per pot at the time of treatment. Bract diameter of Bonzi-treated plants was not different from the control treatment when one dose of PBZ was applied at 1 ppm at all drench volumes and 2 ppm at 3 and 4 fl.oz. Cared-for properly, the poinsettia will give weeks of color and pleasure to its owner. PGRs may not be needed on small and small-medium types such as 'Freedom'. Never use a "spreader-sticker" unless directed to by the label. However, smaller plant diameter resulted from increases in Bonzi concentration or drench volume, but not number of doses. Use of Bonzi effectively reduces internode elongation, resulting in more desirable compact plants. Use of BONZI effecttvely reduces internode elongation, re8ulting in more desirable compo ct plants. Although there are a number of things that can go wrong from now until December 25, there are a few of these that seem to reoccur each year. We want to suppress vegetative growth Fig. When used as … Official tennis player profile of Benjamin Bonzi on the ATP Tour. You can also use it on ornamental plants throughout interiorscapes according to the label. Of course, more labor is required to make drench applications compared to sprays. Ohio Florists' Assoc., Columbus, OH., 60(7):52. Second, the growth during this time is vegetative (i.e. Drench applications are made on the basis of volume per pot (i.e., fl. Resources from UMass Extension and the Center for Agriculture, Food and the Environment: ag.umass.edu/coronavirus. If Bonzi (or another growth-retarding chemical) is applied too early in the crop schedule, or at … Late applications may result in excessive height reduction and/or reduced bract size. The effectiveness of Cycocel and B-Nine is increased when conditions favor slow evaporation. Also, by avoiding the highest levels of active ingredient (two doses of 0.36 mg a.i./pot or one or two doses of 0.45 mg a.i./pot), so too can the bract distortion observed in some treatments. However, one might question if the "stretch" control gained offsets the time and labor involved in making the drench treatments. Foliar sprays of PGRs are more likely to reduce bract size than drenching. Hammer, T.J. Bract internode length decreased with increases in Bonzi concentration and number of doses, but it was not affected by drench volume. They do however make excellent subjects for bonsai, poinsettias readily take to hard pruning and bud back with ease, with age their light brown bark becomes deeply furrowed and gives a strong impression of age. These treatments provided active ingredient in the range of 0.09-0.24 mg a.i./pot. Actual volume depends on pot size. First, poinsettias begin to grow at their most rapid pace during this period, evident by the sigmoidal shape of poinsettia growth curves (some cultivars can be more vigorous during this time than others). Par Brian Cantin, Conseiller sénior aux producteurs. Plant height and diameter reductions in this study were not excessive and would meet the objectives of late season stretch control for most growers. There were no significant differences in plant height among Bonzi-treated plants due to Bonzi concentration, drench volume, or number of doses. ©2020 University of Massachusetts Amherst • Site Policies, Greenhouse Best Management Practices (BMP) Manual, New England Greenhouse Floriculture Guide, Pesticide Information (Labels, MSDS, WPS), Pesticide Licensing (Certification, Exams, Workshops), Soil and Plant Nutrient Testing and Diagnostics, Center for Agriculture, Food, and the Environment, Center for Agriculture, Food and the Environment. The accompanying table has other suggestions for using low levels of A-Rest and Bonzi to control height. Hammer, P.A. Got itchy last night and started pruning - never realized Poinsettias are so sappy! This technique proved to beparticularly effective when used late in the poinsettia season. Les poinsettias sont des plantes de jours courts dites nyctipériodiques, qui ne fleurissent que si la durée de la phase lumineuse durant un jour est de 12h à 13h. Research shows early growing medium drenches with flurprimidol effectively control final poinsettia height. For traditional late-season growth control, drench with Bonzi in the north at ¼ to ½ ppm (0.75 to 1.5 ounces/100 gallons) and in the south at ½ to 1 ppm (1.5 to 3 ounces/100 gallons). oz., one dose of 3 ppm at all drench volumes, and two doses of all combinations of Bonzi and drench volume resulted in smaller bract diameter than the control. GrowerTalks. Bonzi drenches can be utilized to encourage uniform poinsettias of ideal height without significant reductions in bract size. These drench treatments can be applied after October 15 into early November without affecting bract diameter. Il raccourcit les entre-nœudset réduit ainsi l’allongement des plantes ornementales. September 10, 2010. Nos spécialistes ont réuni à votre intention des informations et conseils pour cultiver au mieux les poinsettias - afin qu'ils restent toujours beaux et en bonne santé! A-Rest, B-Nine, Bonzi, Cycocel, and Sumagic are plant growth regulators (PGRs) labelled for use on poinsettias. Normally PGRs are applied during cloudy weather. Additional specific precautions are discussed in the accompanying table. Thus it isn't necessary to use the high levels of active ingredient which led to the reduced bract diameter recorded in this experiment. There are several options for growth regulators on poinsettias and the chemicals and rates utilized vary considerably due to climate and grower preferences. Bonzi “micro-drenches” were developed and named by Dr. Jim Barrett from the University of Florida. Left in the car, however, it may not fair so well. ft./pot). Plants were grown using standard commercial practices under natural light conditions. Plants were pinched on 17 August leaving five or six nodes. My results demonstrate that Bonzi applied as a drench at low concentrations during the early stages of bract expansion and coloring is effective at suppressing the height and diameter of poinsettia. In the opinion of some, closely-spaced bracts make a more desirable poinsettia "flower.". Also, based on my personal observations in some local greenhouses, it is sometimes hard to tell whether there has been any actual control of stretch to justify the effort invested in making the drench treatments.
2020 bonzi on poinsettias