New Guinea Impatiens: Impatiens Necrotic Spot Virus (INSV)

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New Guinea Impatiens: Impatiens Necrotic Spot Virus (INSV)

Stunted plants and distorted leaves with dark green to black blotches, dark streaks, and necrotic concentric rings were observed on New Guinea impatiens (Impatiens hawkeri). This Alert describes and provides photos of Impatiens Necrotic Spot Virus (INSV) on New Guinea impatiens. To confirm INSV, submit plant samples to your preferred diagnostics lab. by W. Garrett Owen – wgowen@msu.edu New Guinea impatiens (Impatiens hawkeri) are popular spring bedding plants started from unrooted cuttings or seed and grown in various sizes of containers and hanging baskets for their copious floral display and sometimes, variegated foliage. During recent greenhouse visits, multiple crops of New Guinea impatiens were inspected because of stunted and distorted growth. Upon closer inspection of the stunted New Guinea impatiens plants with distorted leaves, dark green to black blotches, dark streaks, and necrotic spotting and concentric rings were observed. The magnitude of severity varied among New Guinea impatiens crops. Multiple plants exhibiting different symptomology and signs of a virus infection (concentric rings or spots) was submitted to Michigan State University’s Diagnostic Services lab for testing. Plants were tested with an enzyme – linked immunosorbent assay (ELISA) test. The plants tested positive for Impatiens Necrotic Spot Virus (INSV). Read the full e-Gro Alert here. 4/25/2018 Xylella fastidiosa heads for Britain 4/25/2018 “Asperello T34 Biocontrol keeps working alongside disinfectants” 4/24/2018 “Oh dear, it’s oedema” 4/24/2018 Uganda: Dümmen Orange grows chrysanthemum mother stock with IPM 4/23/2018 Combating vine weevil successfully 4/20/2018 Germany: New insurance for Xylella, ALB and CLB 4/20/2018 US: New product alleviates ethylene damage 4/17/2018 “In Kalanchoes, visible differences within just one week” 4/17/2018 Kenya: BASIS crop protection class still open for enrolment 4/16/2018 “Asperello T34 Biocontrol can limit fungal spread” 4/13/2018 Xylella is spreading through Spain and arrives in Madrid 4/13/2018 CAN (ON): It’s “B” season – Watch for Botrytis, Broad Mite and Burn 4/12/2018 Greenhouse growers, are you ready for thrips? 4/12/2018 Study to identify enzymes in bees that determine neonicotinoid sensitivity 4/10/2018 Italian flowers infected with thrips discovered in Moscow 4/10/2018 US (OR): “Biocontrol delivers root disease prevention” 4/10/2018 New Zealand: New approach to manage myrtle rust 4/9/2018 UK: Bee survival computer model adopted by industry 4/4/2018 Kemin Crop Technologies and Plant Products announce new partnership 4/4/2018 “Faster growth of plants treated with biocontrol” Name * Email * City * Country * Display email address Comment * new code Type the code above