According to a new study, web-like patterns of leaf veining in flowering plants ... this species 201 million years ago had ...

Soybean Vein Necrosis Virus is an Orthotospovirus. This virus can be seed borne or vectored by multiple thrips species. Increased damage is observed in late planted soybeans. As the name implies, ...

When a spot reaches a leaf vein it expands very quickly, causing a necrotic streak along the vein, and can cause blighting of most of the leaf (Figure 4, 5). Trees under stress from other causes will ...