Recognize the attacks of the Apple Aphid Gray
The gray apple aphid is a small insect between olive green and purple with two long black siphons across the body, which tends to nestle at the vegetative apexes of the fruit plant. Generally the attack of this insect does not occur individually, but in colonies. For this reason, it is necessary to act promptly so as not to compromise the fruit harvest and avoid the deterioration of the plant. The affected trees have yellowing and curling of the leaves, due to the removal of lifeblood from the plant by these insects. The damage caused by aphids can also affect small fruits, which until they reach the size of a walnut, are sensitive to the puncture of its mug stylet. The fruits stop their growth by becoming inedible. Plants affected by aphids are covered with honeydew, a sugary substance that favors the formation of smoke.
The females of the Apple Aphid Gray lay their eggs in autumn directly on the plant. The eggs, black in color and elongated, measure 0.6 millimeters in length and 0.3 millimeters in width. They can easily withstand the harsh winter temperatures, and then hatch in spring, with the natural vegetative recovery of the plant. In May, the new winged insects appear on the plantation, which in turn will lay new eggs in November. It is estimated that each aphid can spawn six to nine times in a year, depending on the climatic conditions. Therefore it is easy to guess how fast the infestation of the entire plantation can be, also favored by atmospheric agents such as the wind that helps to drag and scatter the new eggs inside the plantation.