The Mythology Behind Four-Leaf Clovers Rarity isn’t the only reason four-leaf clovers are considered lucky. Several aspects of Celtic culture also influence its association with good fortune.

E376,Causal Agent Beech leaf disease (BLD) is caused by an invasive nematode Litylenchus crenatae subsp. mccannii (Lcm; Figure 1). Nematodes are microscopic roundworms. Most nematodes are free-living, ...