Although B-Nine is not particularly effective on poinsettias alone, when combined with Cycocel this combination works extremely well. On 24 September, when the lateral shoots were about four inches long, plants were sprayed with a solution of 1000 ppm B-Nine and 500 ppm Cycocel. 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. Drench applications are made on the basis of volume per pot (i.e., fl. generally cortez varieties are resistant to late-season stretch. 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 - 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. No bract distortion was evident in any of the other treatments. Avec Bonzi, il est possible de produiredes poinsettias dans les proportions souhaitées. oz. 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). apply a late-season Bonzi drench one to two weeks before shipping when the plants are almost at finished height with at least two to three bracts in full color. Treatment Plant height (cmz) Plant diameter (cm) Bractdiameter (cm) Bract internode length (cm) Bonzi Drench (ppm) (fl. Anyone had any luck with this? Resources from UMass Extension and the Center for Agriculture, Food and the Environment: ag.umass.edu/coronavirus. When used as directed, Bonzi produces no phytotoxic effects. 1992. 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. 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. ft./pot). Got itchy last night and started pruning - never realized Poinsettias are so sappy! DO … September 10, 2010. Overall, bract diameter of was reduced by increases in Bonzi concentration, drench volume, and number of doses. Ohio Florists' Assoc., Columbus, OH., 60(7):52. 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. ©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. Hammer, P.A. An unexpected outcome was that differences in height among Bonzi-treated plants did not result from different concentrations, drench volumes or number of doses. Thus it isn't necessary to use the high levels of active ingredient which led to the reduced bract diameter recorded in this experiment. Starting in late October, higher drench rates can be used to provide stronger hold if needed, with a slight reduction in bract size. Spraying is easiest but the least uniform way of applying PGRs to poinsettias. 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. The B-Nine is thought to act as a carrier for the Cycocel which increases its effectiveness and decreases the potential for phytotoxicity. Growth medium should be uniformly moist when drench applications are made. and G.J. Here are guidelines to consider when using Bonzi: Applications should be uniform, especially if you are using a drip system. Many who keep poinsettias assume that it will last for months in the home environment. The first treatment of 2000 ppm B-Nine and 1000 ppm Cycocel was applied 10 September when the lateral shoots were about two inches long. Planting cuttings with long internodes start the plants at a disadvantage with some extra height even if the plants are to be pinched. Drench applications of PGRs are laborious and mistakes in mixing or applying solutions could be disastrous in terms of too much growth control, uneven results, or bract injury. In 1988, research conducted by Dr. Jim Barrett at theUniversity of Florida demonstrated the potential of Bonzi (paclobutrazol)drenches for poinsettia height control. Growth medium drench treatments were 1, 2, or 3 ppm Bonzi applied in volumes of 3, 4, or 5 fl. Plant height, plant diameter, and bract diameter were measured at the conclusion of the experiment (9 December). The amount of active ingredient applied in each dose are shown in Table 1. Roll, Eds. You can also use it on ornamental plants throughout interiorscapes according to the label. 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). Production de poinsettias – Phase 4. Keep poinsettias away from warm or cold drafts from radiators, air registers or open doors and windows. He even has the ability to compare prices on the products you love and help you save money! Plants were grown using standard commercial practices under natural light conditions. Hammer, T.J. Now that poinsettias are safely tucked into their prop trays and the threat of Erwinia (Pectobacterium) is almost over, it's time to think about other Poinsettia issues. PGRs may not be needed on small and small-medium types such as 'Freedom'. green leaves and stems), not reproductive (red bracts and cyathia). In this study Bonzi was applied to poinsettia by overhead drench or subirrigation either one time using concentrated solutions or 10 times using very dilute solutions. Their leaves are normally quite large (up to 15cm) but reduce well with standard bonsai techniques to around 1/3 normal size. Tips on the use of chemical growth regulators on floriculture crops. Hartley, D.E. The Bonsai Zone, Early Work on My Show Trees, Part 2, July 2017 - Duration: 26:38. Date d'acquisition. Our environmental conditions create a truly unique set of problems that must be overcome to produce a high quality product. Plant size. This technique proved to beparticularly effective when used late in the poinsettia season. In the warmer temperatures of the deep south, we generally use chemical than would be used in cooler regions. We want to suppress vegetative growth Fig. This can be done when the plants are about ½ to 1 inch below the desired height and/or one to two weeks (up to three weeks in the south) before shipping. oz./pot) so results are normally uniform. Never use a "spreader-sticker" unless directed to by the label. Tall cuttings, early planting and pinching, too close spacing, and inadequate light are the major causes of poinsettias finishing too tall. This can be done when the plants are about ½ to 1 inch below the desired height and/or one to two weeks (up to three weeks in the South) before shipping. of A-Rest or Bonzi. For traditional late-season growth control, drench with Bonzi in the north at ¼ to ½ ppm (0.75-1.5 oz/100 gal) and in the south at ½ to 1 ppm (1.5-3 oz/100 gal). At this stage coloring and bract expansion were just beginning. The accompanying table has other suggestions for using low levels of A-Rest and Bonzi to control height. Poinsettia Bonsai from Xmas gift : Today I am going to show you how to make poinsettia bonsai from Xmas / Christmas tree. Cared-for properly, the poinsettia will give weeks of color and pleasure to its owner. Sprays should be applied on the basis of volume of spray per square foot of bench (generally 1 gal./200 sq.ft.) oz. Christopher J. Currey and Roberto G.Lopez Controlling height is an important aspect of poinsettia production. PGR use is most likely on cultivars such as 'Success', and 'Monet'. The objective of this study, supported by the Massachusetts Flower Growers' Association, was to test Bonzi for late season height control by studying the effects of Bonzi concentration, drench volume applied, and number of doses. However, you should not reuse any containers that were used to treat ornamentals with Bonzi. A desirable level of plant size reduction without a reduction in bract diameter and no bract distortion resulted from one dose of 1 ppm Bonzi (all drench volumes) and 2 ppm (3 and 4 fl.oz.). Several Massachusetts growers have been making these treatments for a number of years and are pleased with the results. Poinsettias are shade-avoiding plants, which is why they tend to stretch on the nursery without a reliable PGR programme. Poinsettias (potted). Wilfret. Plant height and diameter reductions in this study were not excessive and would meet the objectives of late season stretch control for most growers. A-Rest, B-Nine, Bonzi, Cycocel, and Sumagic are plant growth regulators (PGRs) labelled for use on poinsettias. 59(14):42, 44, 46-50. Bonzi® est un régulateur de croissance qui a de nombreuses applications. 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. after the Bonzi drench the plants generally grow an additional ½ – 1"/1.27 – 2.54 cm depending on the drench rate used. Please Log in or Create an account to join the conversation. Welcome to the world of BonziBUDDY! Bonzi drenches can be utilized to encourage uniform poinsettias of ideal height without significant reductions in bract size. Bonzi peut être utilisé dans les poinsettias pendanttoute la période de culture et permet d’obtenir une couleur de feuille riche, 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. apply the Bonzi at ¼ – ½ ppm in the North and ½ – 1 ppm in the … Bonzi “micro-drenches” were developed and named by Dr. Jim Barrett from the University of Florida. Stock Solution Preparation: ppm Bonzi drench 1:100 injector Hozon using 5 gal bucket 5 gal bucket for hand dipping 1 3.33 oz per gal 2.5 oz per 5 gallons 1 tsp per 5 gallons 2 6.66 oz per gal 5.0 oz per 5 gallons 2 tsp per 5 gallons All plants, with the exception of the control group, were treated with a Bonzi drench as soon as 2 or 3 of the uppermost leaves showed some red coloring (28 October). Drench solutions should be prepared to supply 1 or 2 ppm a.i. Bract internode length decreased with increases in Bonzi concentration and number of doses, but it was not affected by drench volume. Growers can try to control late season stretch by applying a very dilute drench of A-Rest or Bonzi. Oz) 1 dose 2 doses 1 dose 2 doses 1 dose 2 doses 1 dose 2 doses Control (no Bonzi) 39.0 59.3 33.5 5.1 1 3 35.7y 3M 53.9 56.0 31.8 30.8 A3 4J. It's like Ficus times 10 - white milky sap everywhere.... they look pretty cool though - good ramification. Use Bonzi PGR on container ornamentals in greenhouses, shade houses and nurseries. Micro drenches of Bonzi can be used at any stage of production, and it will not decrease the bracts to an unsellable state. One-half of the Bonzi-treated plants received a second dose two weeks later (11 November). Bonzi applied during the early stages of bract formation and coloring generally resulted in shorter plants and smaller plant diameter compared to the control treatment (Table 2). There are several options for growth regulators on poinsettias and the chemicals and rates utilized vary considerably due to climate and grower preferences. C… 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. Growing poinsettias in Texas is a challenge. Based on my results, the use of two doses of Bonzi drench or any combination of Bonzi concentration and drench volume resulting in a level of active ingredient above 0.24 mg a.i./pot risks a reduction in bract diameter and bract distortion. Research shows early growing medium drenches with flurprimidol effectively control final poinsettia height. There were no significant differences in plant height among Bonzi-treated plants due to Bonzi concentration, drench volume, or number of doses. Most of the poinsettia cultivars introduced within the last 10 years require less PGR than earlier types. Therefore, it is probably worthwhile to leave at least 10 representative plants untreated to evaluate the effectiveness of the low concentration drench treatments. When used as … The volume of the drench together with ppm determines mg a.i./pot (Table 1). A-Rest, B-Nine, Bonzi, Cycocel, and Sumagic are plant growth regulators (PGRs) labelled for use on poinsettias. Actual volume depends on pot size. Of course, more labor is required to make drench applications compared to sprays. ©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. 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. 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! 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. 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. 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. Late applications may result in excessive height reduction and/or reduced bract size. This site is maintained by Center for Agriculture, Food and the Environment in the College of Natural Sciences. 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. We have also found that bract development is affected less by Bonzi sprays than bythe B-Nine/Cycoceltank mix. Florida has demonstrated that applying growth retardants as a drench provides excellent height control and is safer than sprays. to achieve uniform application. An unexpected outcome was that differences in height among Bonzi-treated plants did not result from different concentrations, drench volumes or number of doses.
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