Please Log in or Create an account to join the conversation. 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 Effect ofBonzi drench applications on plant and bract size of 'Red Sails' poinsettia. Growth medium should be uniformly moist when drench applications are made. All of the causes of excess height interact to affect final plant height. 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. It is used primarily as a soil drench application. It's like Ficus times 10 - white milky sap everywhere.... they look pretty cool though - good ramification. Left in the car, however, it may not fair so well. Ohio Florists' Assoc., Columbus, OH., 60(7):52. When making PGR drenches, remember that the amount of active ingredient (mg a.i./pot) applied is more important than the concentration (ppm) of the drench solution. 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. Bonzi “micro-drenches” were developed and named by Dr. Jim Barrett from the University of Florida. Additional specific precautions are discussed in the accompanying table. and two doses of 3 ppm applied at 4 and 5 fl. Actual volume depends on pot size. 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. These treatments provided active ingredient in the range of 0.09-0.24 mg a.i./pot. 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. 1992. The accompanying table has other suggestions for using low levels of A-Rest and Bonzi to control height. Poinsettia primer. Production de poinsettias – Phase 4. Never use a "spreader-sticker" unless directed to by the label. 1 4 33.7 36.1 50.6 54.5 31.7 29.3 4J2 12 to achieve uniform application. Planting cuttings with long internodes start the plants at a disadvantage with some extra height even if the plants are to be pinched. Bonzi peut être utilisé dans les poinsettias pendanttoute la période de culture et permet d’obtenir une couleur de feuille riche, He will explore the Internet with you as your very own friend and sidekick! Section 13, pp.75-77 in: H.K. 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. Growth medium drench treatments were 1, 2, or 3 ppm Bonzi applied in volumes of 3, 4, or 5 fl. 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. All plants were treated twice in September with a foliar spray of B-Nine and Cycocel. 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. after the Bonzi drench the plants generally grow an additional ½ – 1"/1.27 – 2.54 cm depending on the drench rate used. Most of the poinsettia cultivars introduced within the last 10 years require less PGR than earlier types. 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 Bonzi for regulation of poinsettia growth: Bonzi has shown growth retarding activity on a wide range of ornamental species and at very low dosage rates. oz./pot. Bring it inside. All Bonzi treatments resulted in shorter bract internode length compared to the control. Use of BONZI effecttvely reduces internode elongation, re8ulting in more desirable compo ct plants. Their leaves are normally quite large (up to 15cm) but reduce well with standard bonsai techniques to around 1/3 normal 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. Here are guidelines to consider when using Bonzi: Applications should be uniform, especially if you are using a drip system. 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. The amount of active ingredient applied in each dose are shown in Table 1. Cared-for properly, the poinsettia will give weeks of color and pleasure to its owner. 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. 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. In these examples we will use a combination of sprays, early drenches and a late drench to achieve desired heights. This site is maintained by Center for Agriculture, Food and the Environment in the College of Natural Sciences. Keep poinsettias away from warm or cold drafts from radiators, air registers or open doors and windows. For example, Bonzi (paclobutrazol, Syngenta Professional Products) is often used as a drench during poinsettia production to reduce unwanted stem elongation late in the crop. He can talk, walk, joke, browse, search, e-mail, and download like no other friend you've ever had! Close spacing and inadequate light due to poor transmission by the greenhouse covering or cloudy weather are major causes of stretch late in the growing season. All Bonzi-treated plants received 6.8 fl.oz. 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. Plant height and diameter reductions in this study were not excessive and would meet the objectives of late season stretch control for most growers. Second, the growth during this time is vegetative (i.e. 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). Starting in late October, higher drench rates can be used to provide stronger hold if needed, with a slight reduction in bract size. Hammer, T.J. Drench applications are made on the basis of volume per pot (i.e., fl. This technique proved to beparticularly effective when used late in the poinsettia season. 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. Late applications may result in excessive height reduction and/or reduced bract size. green leaves and stems), not reproductive (red bracts and cyathia). Foliar sprays of PGRs are more likely to reduce bract size than drenching. Our environmental conditions create a truly unique set of problems that must be overcome to produce a high quality product. 1996. 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. Proper spacing is a key. oz. Plants were pinched on 17 August leaving five or six nodes. Many growers report too tall or "stretching" poinsettias late in the season. 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. Avec Bonzi, il est possible de produiredes poinsettias dans les proportions souhaitées. Many who keep poinsettias assume that it will last for months in the home environment. At this stage coloring and bract expansion were just beginning. 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. oz./pot) so results are normally uniform. Roll, Eds. Wilfret. Hammer, P.A. Poinsettia Bonsai from Xmas gift : Today I am going to show you how to make poinsettia bonsai from Xmas / Christmas tree. Welcome to the world of BonziBUDDY! Date d'acquisition. Using low levels of PGRs after the start of short days may help control stretch in these situations. The dosage rate is 4 fl. We want to suppress vegetative growth Fig. Micro drenches of Bonzi can be used at any stage of production, and it will not decrease the bracts to an unsellable state. of PGR solution per pot at the time of treatment. Bract internode length decreased with increases in Bonzi concentration and number of doses, but it was not affected by drench volume. Il raccourcit les entre-nœudset réduit ainsi l’allongement des plantes ornementales. Florida has demonstrated that applying growth retardants as a drench provides excellent height control and is safer than sprays. 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). Poinsettias (potted). z2.54 centimeters (cm)=1 inch.yA value that has been boldfaced means that it is significantly different from the control by Dunnett's procedure, p=0.05. Plant height, plant diameter, and bract diameter were measured at the conclusion of the experiment (9 December). Use of Bonzi effectively reduces internode elongation, resulting in more desirable compact plants. 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. ©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. There were no significant differences in plant height among Bonzi-treated plants due to Bonzi concentration, drench volume, or number of doses. Proper application of Bonzi will produce a much higher quality product. Par Brian Cantin, Conseiller sénior aux producteurs. Spraying is easiest but the least uniform way of applying PGRs to poinsettias. The effectiveness of Cycocel and B-Nine is increased when conditions favor slow evaporation. Also, because PGRs are treated as pesticides and have assigned re-entry intervals (12 hour REI - A-Rest, Cycocel, Sumagic; 24 hour REI - B-Nine, Bonzi), frequent use of PGRs may disrupt other work in some greenhouse operations. Treatment effects on plant height were similar with one or two doses. Plants were grown using standard commercial practices under natural light conditions. 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 are several options for growth regulators on poinsettias and the chemicals and rates utilized vary considerably due to climate and grower preferences. If Bonzi (or another growth-retarding chemical) is applied too early in the crop schedule, or at … When used as … green leaves and stems), not reproductive (red bracts and cyathia). Starting in late October, higher drench rates can be used to provide stronger hold if needed with a slight reduction in bract size. These drench treatments can be applied after October 15 into early November without affecting bract diameter. PGRs are very useful tools for controlling the height of poinsettias, but overeliance on PGRs is potentially costly in terms of material and labor. Use Bonzi PGR on container ornamentals in greenhouses, shade houses and nurseries. Drench solutions should be prepared to supply 1 or 2 ppm a.i. Don't know if they can be wired at all - stems and branches are very fragile and snap extremely easy. However, foliar sprays of 25-50 ppm on poinsettia were nearly as effective as drenches and provided reasonable growth control. 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. 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.). For example, six-inch pots containing one pinched plant should be spaced 13x14" (i.e., a minimum of 1.2 sq. Growing poinsettias in Texas is a challenge. Rates for Bonzi, Paczol Drenching Calculations- Rick Yates 2.20.09 . PGR use is most likely on cultivars such as 'Success', and 'Monet'. Research shows early growing medium drenches with flurprimidol effectively control final poinsettia height. Tall cuttings, early planting and pinching, too close spacing, and inadequate light are the major causes of poinsettias finishing too tall. No bract distortion was evident in any of the other treatments. A-Rest, B-Nine, Bonzi, Cycocel, and Sumagic are plant growth regulators (PGRs) labelled for use on poinsettias. Features - Poinsettias. 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). Plants should be fully turgid when PGRs are applied (Cycocel injury is most common on water-stressed plants). 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. Rooted cuttings of 'Red Sails' poinsettia were potted on 29 July 1999 in 6-inch azalea pots of Fafard 3B. Thus it isn't necessary to use the high levels of active ingredient which led to the reduced bract diameter recorded in this experiment. The Bonsai Zone, Early Work on My Show Trees, Part 2, July 2017 - Duration: 26:38. oz. 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. Second, the growth during this time is vegetative (i.e. This site is maintained by Center for Agriculture, Food and the Environment in the College of Natural Sciences. Control of late season stem elongation did not require the highest concentrations of Bonzi, large drench volumes, or two doses. Resources from UMass Extension and the Center for Agriculture, Food and the Environment: ag.umass.edu/coronavirus. Tips on the use of chemical growth regulators on floriculture crops.
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