The use of silicone surfactant in Japanese angelica (Aralia elata) treatments
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1 The use of silicone surfactant in Japanese angelica (Aralia elata) treatments By: Matthew Kaplan Grade:11 White Plains High School _products/silicone-spray/2.html
2 Introduction Silwet L-77 is a surfactant. opens up the stomata of the cell, allowing more respiration and nutrient production. are typically used to increase agricultural output. Silwet can be used in conjunction with other materials. effects of herbicides, fertilizers and pesticides can be magnified with its use. 2 types of treatment : basal bark treatment. foliar treatment. category/morphology/distribution/
3 Introduction Japanese angelica tree (Aralia elata) introduced to the U.S. in yields small fruits which birds will eat. has incredible regenerative properties. grows near the forest s edge. grows in clusters. The Teatown Reservation has a powerline habitat that acts as a forest s edge. Angelica is rampant in that area. /Japanese_Angelica_Tree p=4285
4 Why is it bad? Japanese angelica trees are detrimental to the environment because their dense canopy obstructs light from reaching the forest floor. prevents other plants to grow under it. diminished biodiversity in the area where the JAT grows. One of the benefits of having a powerline is a presence of different kinds of flora + fauna.
5 Methodology Study tested the efficacy of using Silwet in food dye solutions. red/blue food dye was used. both types of treatments were tested. control was water + food dye. Solutions were different for both experiments. ex. groups for foliar- 0.5% Silwet. ex. groups for B.B. treatment- 2% Silwet. red/blue dye in solutions remained consistent.
6 Methodology Foliar Treatment- administered 10 μl of red dye solutions on leaves. after 10 minutes, leaves were washed over a funnel with ethanol. remaining substance was collected in a glass container. substances were tested for absorbency using a colorimeter. BB Treatment- bark of tree was lathered with the blue dye solutions. 1 hour- chiseled off the bark of tree to observe infiltration in xylem. 24 hours- observed chiseled bark for seepage and other irregularities.
7 Basal Bark Treatment The basal bark treatment showed little to no infiltration in the xylem around trees treated with the control solution 24 hours after application. Trees treated with the experimental solution showed infiltration after just 1 hour. 24 hours after application, spreading was seen along the veins of experimental plants.
8 Basal Bark Treatment After 1 Hour After 24 Hours BB(E) 1 Y Spread to veins in xylem of tree BB(E) 2 Y Seeped in and around pores BB(E) 3 Y Seeped in and around pores BB(E) 4 Y More spreading than all experiment subjects BB(E) 5 Y Ants were on open area of bark, otherwise blue in pores. BB (C) 1 N Slightly Blue around edges, mostly green BB (C) 2 N Green BB (C) 3 N Green BB (C) 4 N Green BB (C) 5 N Green Experiment Control
9 Foliar Treatment The results for the foliar treatment showed that the leaf absorbed more red dye when exposed to the Silwet solution. using a colorimeter, the solutions showed how much dye was not absorbed by the leaf. Creating specific ratios of solutions and then testing their absorbency. Calculate approximately how much red dye was absorbed by the plant.
10 Absorbency of Solution (520 nm) Foliar Treatment Absorbency of Solutions 1.2 F-E F-E F-E F-E F-E y = x R² = # of Microliters (μl) F-C F-C F-C F-C F-C Absorbency (520 nm) 58.3% Experiment Control Avg. Experiment Avg. Control
11 Conclusion/Discussion Inclusion of Silwet in solutions can help transport foreign materials into a tree. both basal bark and foliar treatments are amplified with the use of Silwet L-77. Further research should use herbicides. test ground infiltration. test surrounding plants when using foliar treatment. use of different invasive species. find out what the Silwet is exploiting in basal bark treatments
12 TESA and Teatown Staff (Rebecca + Hillary) Mom and Dad Special thanks to Chris Hannon All of the other students at TESA!
13 The use of silicone surfactant in Japanese angelica (Aralia elata) treatments By: Matthew Kaplan Grade:11 White Plains High School _products/silicone-spray/2.html
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