PARTICIPIAL PHRASE. Present participles, verbals ending in-ing, and past participles, verbals that end in-ed (for regular verbs) or other forms (for irregular verbs), are combined with complements and modifiers and become part of important phrasal structures.Participial phrases always act as adjectives.ometimes part of the noun phrase is delayed until the end of the sentence so that that portion of the phrase (usually modifying phrases  participial or prepositional) can receive end weight or focus.
Insect borers often attack trees that are weakened or damaged by other causes. In some cases, borers and plant pathogens are associated with the same canker. Leaf drop Leaf drop is generally caused by plant pathogens or environmental problems.
This tiny sawfly lays an egg in the base of the leaf stem, called the petiole. A larva hatches out and burrows into the petiole, interfering with the transport of water and nutrients. Leaves often drop off green. Fortunately, not enough leaves fall to hurt the tree, so I donât spray. Major Big-Honking Problem â Sudden, Total Leaf Drop One day in early September, your oak tree looks fine. Suddenly, the leaves turn light green, then yellowish, then brown, and then they all fall off. This might by OK in Montana, where fall comes early, but not in the South.