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How to control dodder (Cuscuta) on lychee and longan
Dodder has no roots and no leaves, but its stem bears serrated haustoria (or sucking roots), which it uses to penetrate deep into the bark to absorb nutrients, affecting the growth of the fruit seedlings; in severe cases it can cause the seedlings to wither and die. It is more commonly seen in mature lychee orchards in mountainous areas. Dodder can flower and set seed; the flowers are small and white, and the fruit drops to the ground on its own after ripening...