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Spider Mite Control in Vegetables      Dr. Ayanava Majumdar (Dr. A)             Ext. Entomologist            115 Extension...
References• Jon Traunfeld. 2013. Top Vegetable pests – spider mite. Univ. of Maryland  Extension.• Godfrey, L. D. 2011. Sp...
Basic information             • Very common problem               in AL             • 1/20 inch long             • Mites a...
Life cycle     • Life cycle completed <1 wk (5       to 20 d)     • Like hot dry weather     • Eggs are small oval (look l...
Identification & ScoutingTwospotted spider mite (TSM):• Carry a 10X hand lens• Females are larger than males• Oval adults,...
Crop damageTSM:                    TRM:  – Leaf drying           – Greasy bronzing  – Extensive webbing       (russet colo...
Spider mite managementCULTURAL PRACTICES:• Start clean: Get healthy transplants• Avoid planting in hot dry conditions• Avo...
Spider mite managementALTERNATIVE MITICIDES:• Layton et al. (2011): 2 applications of insecticidal oil,  insecticidal soap...
Spider mite managementCAUTION: Many synthetic pyrethroids can flare up spider mites byremoving predatory mites and other b...
Spider mite managementBifenazate (Acramite, 0.75-1 lb/acre):• MOA: GABA agonist• Contact poison against motile stage of TS...
Spider mite managementFenpyroximate (Portal, 2 pts/acre):• Mitochondrial electron transport inhibitor  (METI), blocking ce...
Spider mite managementEtoxazole (Zeal, 2 to 3 oz/acre):• Good contact miticide but not labeled on  many crops• Kills eggs ...
Spider mite managementSpiromesifen (Oberon, 7 to 8.5 fl oz):• Mitochondrial electron transport inhibitor  (METI), blocking...
Efficacy of PORTAL for Spider Mite Control 2012                           (fenpyroximate 5%)        84                    ...
Mite control in high tunnelLocation: Brannon Farm, Addison, AL, 2012Crop: TomatoPest: Two-spotted spider miteTreatment: In...
Efficacy of BRIGADE, SUFFOIL-X, JMS STYLEY-OIL for Spider                     Mite Control 2012                           ...
Organic Approved Insecticides
Alabama Vegetable Extension IPM Website           www.aces.edu/go/87
Join Vegetable IPM on Facebook!    Advantages: Live updates, interact with researchers, videos and photos, IPM contest
The IPM Communicator   (A FREE electronic newsletter)To signup: Email bugdoctor@auburn.eduOr sign up today on the sheet pr...
References used• Jon Traunfeld. 2013. Top Vegetable pests – spider mite. Univ. of Maryland  Extension.• Godfrey, L. D. 201...
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Spider mite control in vegetables 2013

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This presentation was delivered to farmers at the Alabama Fruit & Vegetable Growers Conference & Tradeshow in Auburn University, Alabama (USA), on

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Transcript of "Spider mite control in vegetables 2013"

  1. 1. Spider Mite Control in Vegetables Dr. Ayanava Majumdar (Dr. A) Ext. Entomologist 115 Extension Hall Auburn, AL 36849 Tel: (251) 331-8416 bugdoctor@auburn.edu AFVGA Conference, Feb. 9, 2013
  2. 2. References• Jon Traunfeld. 2013. Top Vegetable pests – spider mite. Univ. of Maryland Extension.• Godfrey, L. D. 2011. Spider mites. University of California – Statewide IPM Program, Pubication 7405.• Fasulo, T. R. 2009. Twospotted spider mites. Univ. of Florida – IFAS Publication EENY-150. http://entnemdept.ufl.edu/creatures/orn/twospotted_mite.htm• Zalom et al. 2011. UC IPM Pest Management Guidelines: Tomato. University of California ANR Publication 3470. http://www.ipm.ucdavis.edu/PMG/r783400111.html• Schuster, D. Tomato russet mite. Univ. of Florida – IFAS Publication. http://ipm.ifas.ufl.edu/resources/success_stories/T&PGuide/pdfs/Chapter4/ Russet_Mite.pdf• Peter Jentsch. Mite Management Using Reduced Risk Pest Management Programs and Biological Control. Cornell University. http://hudsonvf.cce.cornell.edu/scouting%20reports/scouting%20data/Mite %20Management%20Using%20Reduced%20Risk%20Pest%20Management%2 0Programs%20and%20Biological%20Control.pdf
  3. 3. Basic information • Very common problem in AL • 1/20 inch long • Mites are not insects • Related to spiders & ticks • Spin webs – live in colonies • Immature stages have 6 legs • Overwinter as mated females
  4. 4. Life cycle • Life cycle completed <1 wk (5 to 20 d) • Like hot dry weather • Eggs are small oval (look like dust particles, underside of leaves), 3 d to hatch • Eggs change to larva (6 legs) • Larva change to nymphs (8 legs) – two stages • 5 to 10 generations common
  5. 5. Identification & ScoutingTwospotted spider mite (TSM):• Carry a 10X hand lens• Females are larger than males• Oval adults, eggs glued to webbing• Underside of leaves & leaf tips• Wide host range Twospotted spider mite Tetranychus urticaeTomato russet mite (TRM):• Smaller than TSM• Carry a 14X hand lens• Adults are elongate• Infestation starts from lower leaves• Leave edges, stems, fruits (small) Tomato russet mite• Solanaceous host plants Acilops lycopersici
  6. 6. Crop damageTSM: TRM: – Leaf drying – Greasy bronzing – Extensive webbing (russet color) – Sudden dry out – Slight bronzing (lower leaves)
  7. 7. Spider mite managementCULTURAL PRACTICES:• Start clean: Get healthy transplants• Avoid planting in hot dry conditions• Avoid mowing or blowing dust on to crops• Avoid water stress on plants
  8. 8. Spider mite managementALTERNATIVE MITICIDES:• Layton et al. (2011): 2 applications of insecticidal oil, insecticidal soap or neem oil provided good TSM control• OMRI approved: Grandevo (extracted from Chromobacterium subtsugae) – 2 treatments on strawberry provided 63 to 80% mite suppression
  9. 9. Spider mite managementCAUTION: Many synthetic pyrethroids can flare up spider mites byremoving predatory mites and other beneficial insects. Abamectin (AgriMek, 8-16 fl oz/acre): • Good rescue insecticide. • Contains synthetic abamectin and provides long-term residual control of TSM. • Do not apply more than two sequential applications of abamectin. • PHI on tomatoes is 7 days.
  10. 10. Spider mite managementBifenazate (Acramite, 0.75-1 lb/acre):• MOA: GABA agonist• Contact poison against motile stage of TSM• Has some ovicidal action (kills eggs)• Reduced toxicity to predaceous mites and beneficial arthropods.• Do not make more than one application per season.• PHI on tomatoes is 3 days.
  11. 11. Spider mite managementFenpyroximate (Portal, 2 pts/acre):• Mitochondrial electron transport inhibitor (METI), blocking cellular respiration• Stops mite feeding & egg laying, 7 day to kill• Good late season rescue insecticide• Limit to one application per year• Softer on predatory mites• Complete coverage essential
  12. 12. Spider mite managementEtoxazole (Zeal, 2 to 3 oz/acre):• Good contact miticide but not labeled on many crops• Kills eggs and stops molting of immatures• Has translaminar movement• Could take several days to act
  13. 13. Spider mite managementSpiromesifen (Oberon, 7 to 8.5 fl oz):• Mitochondrial electron transport inhibitor (METI), blocking cellular respiration• Kills motile mite but slow acting
  14. 14. Efficacy of PORTAL for Spider Mite Control 2012 (fenpyroximate 5%) 84 73 35 Untreated check 17 Portal 32 oz + NIS 9 7 1 3 Acramite + NIS 0 20 Sept (mite buildup 4 Oct. (mite control) 12 Oct. (mite control) with pyrethroids) 7 DAT 17 DATCrop was tomatoes. Location: Chilton REC, Clanton, AL. Treatment dates: 26 July (Mustang Max) & 9 Aug.(Warrior) to buildup mites. Portal treatment date was 24 Sept.Numbers indicate spider mites on 40 plants/treatment (10 plants/plot). Excessive rains prevented a steadypressure of mites.
  15. 15. Mite control in high tunnelLocation: Brannon Farm, Addison, AL, 2012Crop: TomatoPest: Two-spotted spider miteTreatment: Insecticide rotation in high tunnel tomatoes. Suffoil –X has paraffinic oil. Acramite hasbifenazate. Entire rows treated with untreated plants at the two ends.Observation: Mites per 20 leaflets on each observation date. 12 Mixed approach 10 to prevent 9.6 8.2 miticide overuse 7.8 8 6.5 6 Treated crop Untreated Ch. (tunnel ends) Suffoil-X @ 4 1Ga/100Ga water Acramite 50WP 2 1.9 @ 1lb/A 0 Obs. 1 (July 6) Obs. 2 (July 15) Obs. 3 (July 23)
  16. 16. Efficacy of BRIGADE, SUFFOIL-X, JMS STYLEY-OIL for Spider Mite Control 2012 56 Reduction in mites with JMS Stylet-Oil & Suffoil-X is good but action could be slow! 45 35 34 32 27 Untreated check 23 26 Suffoil-X (0.01%) 18 JMS Stylet-Oil (3 qt) 14 17 11 12 Bifenthrin 5 oz/A 27 Sept. 3 Oct. 12 Oct. 19 Oct.Crop was tomatoes. Location: Chilton REC, Clanton, AL. Numbers indicate spider mites on 40 tomato plants.
  17. 17. Organic Approved Insecticides
  18. 18. Alabama Vegetable Extension IPM Website www.aces.edu/go/87
  19. 19. Join Vegetable IPM on Facebook! Advantages: Live updates, interact with researchers, videos and photos, IPM contest
  20. 20. The IPM Communicator (A FREE electronic newsletter)To signup: Email bugdoctor@auburn.eduOr sign up today on the sheet provided!
  21. 21. References used• Jon Traunfeld. 2013. Top Vegetable pests – spider mite. Univ. of Maryland Extension.• Godfrey, L. D. 2011. Spider mites. University of California – Statewide IPM Program, Pubication 7405.• Fasulo, T. R. 2009. Twospotted spider mites. Univ. of Florida – IFAS Publication EENY-150. http://entnemdept.ufl.edu/creatures/orn/twospotted_mite.htm• Zalom et al. 2011. UC IPM Pest Management Guidelines: Tomato. University of California ANR Publication 3470. http://www.ipm.ucdavis.edu/PMG/r783400111.html• Schuster, D. Tomato russet mite. Univ. of Florida – IFAS Publication. http://ipm.ifas.ufl.edu/resources/success_stories/T&PGuide/pdfs/Chapter4/ Russet_Mite.pdf• Peter Jentsch. Mite Management Using Reduced Risk Pest Management Programs and Biological Control. Cornell University. http://hudsonvf.cce.cornell.edu/scouting%20reports/scouting%20data/Mite %20Management%20Using%20Reduced%20Risk%20Pest%20Management%2 0Programs%20and%20Biological%20Control.pdf
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