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INSV infection |
| This is the first time I have heard of this disease. But, thanks to Jana now all our members can be aware of it. Jana explains more below the pictures. |
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The pictures shown below are credited to Audrey Gottshall
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Judy, The non-blooming AV looks very much like photos I've seen of INSV. Here's part of an article: Key warning symptoms: Ringspots -- looks like bulls eye Distorted leaves Mottle -- splotchy looking Stunting -- like the center of that AV Chlorosis -- light green or faded green coloring The two pathogens we detect most frequently in African Violets and other gesneriads are Impatiens necrotic spot virus and Tomato spotted wilt virus. Both are transmitted by thrips and can cause a number of symptoms, which can include ringspots and mottle on leaves and brown rings around the leaf petiole. ******************************************************************* Common symptoms of INSV infection can include brown leaf spots, concentric ringspots (either yellow or brown), brown stem lesions, stunting, wilting, vein browning and necrosis, and mosaic line patterns. Leaf mottling and leaf distortion are also suspicious symptoms. ******************************************************************* I've attached a file with photos of INSV on various plants. The photo of the AV in that file is NOT very representative of an AV with INSV. Check for ring spots, mottling, etc. in those photos & then look again at the closer photo of the non-blooming AV. Sadly, there is no treatment or cure for INSV. The plant must be destroyed if it has INSV. Do not compost any diseased plant, especially if INSV is suspected. Wrap in newspapers, double bag & place in the trash for pick up. There is only 1 way to know for certain if it is INSV. That requires a test. Cape Cod sells INSV test kits with instructions -- which are a bit complicated. The test kit costs more than the AV. Jana |
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