آفت نوظهور سرخرطومی میوه کنار Alcidodes cf. willcocksi (Col.: Curculionidae) و پایش آن در ناحیه رویشی صحارا سندی ایران

The fruits of konar trees are attacked by a fruit weevil in the region of Sahara-Sandi (Busher, Khuzestan, Hormozgan, southern Kerman and Sistan & Baluchistan). The adults of Alcidodes cf. willcocksi appears in nature from the middle of September at the same time as the trees blooming. After feeding on the fresh fruits and leaves, they mate and then lay eggs. The egg laying was started when the complete falling of the petals, happened. The female of this weevil creates holes on the the fruit surface to the nut to lay eggs, and while feeding on the fruit tissue, it lays an egg on the nut of the fruit.After hatching, the young larva enters the nut, while feeding on the nut, causes the complete destruction of the fruit seeds, thus threatening the reproduction of the konar trees. Each female insect lays only one egg into the Konar fruit. After feeding on the seed, the larvae turned into pupae and after the pupation period, the adults came out of the konar fruit. different species of the genus Konar, including Ziziphus spinachristi , Z. nomularia and Z. Mauritania, are known as the main hosts of this pest. This pest has 2 to 3 generations in a year and its main activity starts from the middle of September when the trees are blooming and continues until the middle of March when the fruits of the trees are picked. The results of monitoring the population fluctuations of fruit weevil and the level of damages with this pest in Konar habitats from 2018 to 2021 in the provinces of the region of Sahara-Sandi showed that the highest percentage of damage with 17.33% in 2018 in Bushehr province and the lowest obtained with 3.82% in Hormozgan province in 2019. The average damage with this pest during the four years of research project showed that the highest damage was in Khuzestan province with 13.42% and the lowest in Hormozgan province with 6.06%.