It causes a lot of damage to domestic and wild pistachios. This insect Iranian Pistachio excretes a lot of honey, which dries and whitens quickly in the presence of air, so this pest is called dry sap in the local language. Biology Adult overwintering insects Psyllids settle on trees from early April. These insects have more flight power than adult summer insects, causing more contamination in gardens. After mating, as soon as the buds of the clusters and leaves open, they lay eggs on them. The eggs are laid in numbers of 50 to 60, individually or in groups, in various shapes such as semicircles, spirals, etc. on the surface of the leaves and more close to the petals. The eggs usually hatch in 5 to 10 days. The nymphs start working and feeding in early May. The nymphal period is usually 20 days and the first generation of adult insects appear in large numbers in the garden from the end of the second decade of May. Different pistachio cultivars have different susceptibility to pistachio psyllid contamination. In general, the thinner, softer, wider, and larger the leaves of trees, the greater the tendency to attract adult psyllids and spawn. Akbari cultivar is more sensitive than other cultivars and Ouhadi cultivar is more resistant.