Gall-inducing insect Gall-inducing insect A gall-inducing insect is any insect that can cause the growth of galls within plants. The term gall fly is also used to cover these species, although most are not true flies. There are several groups of insects that meet this description. They include the gall wasps, scales, gall midges, aphids, psyllids and certain species of leafminer flies. Galls are growth deformities induced in certain plants by various insects which are mostly species-specific. The gall's form or type depends on what organism is attacking the plant and where the plant is being attacked. Based on the form, there
Ant on a rubber rope a given time formula_36 is its speed relative to the rope, i.e. formula_18, plus the speed of the rope at the point where the ant is. The target-point moves with speed formula_38, so at time formula_39 it is at formula_40. Other points along the rope move with proportional speed, so at time formula_39 the point on the rope at formula_42 is moving with speed formula_43. So if we write the position of the ant at time formula_39 as formula_45, and the speed of the ant at time formula_39 as formula_47, we can write: This is a first order linear differential