Viruses can only be definitively diagnosed in a lab under high magnification or with various serological test kits. Symptoms can include necrotic streaks, spots, rings and lines on leaves and stems; vein necrosis; distorted flowers, stems and leaves; general stunting; and bud drop. Black, brown, reddish or yellowish concentric rings, although not always present, are also symptoms of viral infection. This virus is spread by thrips which feed on infected plants and spread the virus to healthy plants via their saliva.
Never use infected stock plants for propagation and discard any plants testing positive for virus infection. Quarantine suspect plants in a separate holding section while awaiting diagnostic results. Viruses may be spread via propagation, sap, seed, pollen, insects, mites, nematodes, fungi and parasitic plants. Using contaminated tools on healthy plants can also spread viruses. Monitor and control thrips populations in the greenhouse setting.
No preventative or curative chemical controls are available for managing INSV. Removing infected plants and managing thrips are the best ways to manage this disease.
January - Early , January - Mid , January - Late , February - Early , February - Mid , February - Late , March - Early , March - Mid , March - Late , April - Early , April - Mid , April - Late , May - Early , May - Mid , May - Late , June - Early , June - Mid , June - Late , July - Early , July - Mid , July - Late , August - Early , August - Mid , August - Late , September - Early , September - Mid , September - Late , October - Early , October - Mid , October - Late , November - Early , November - Mid , November - Late , December - Early , December - Mid , December - Late