Seed bugs Graptostethus servus and Spilostethus pandurus (Heteroptera : Lygaeidae)‎ as a newly attracted pests on oil crops and bindweed in Egypt

الملخص EN

The Lygaeidea is one of the most diversified group, comprises of about 4000 species under 500 genera all over the world, it includes some species are pests of agriculture and vegetation, most species of this family are known as seed bugs.

The aim of this work is to study the taxonomy and morphological characters of the two species of family Lygaeidea by redescription of them as well as the role of essential oil (EO) of bindweed (Convolvulus arvensis L.

) as semiochemical attractive of these two genera.

The results indicated that, two species under two genera of seed bugs were recoded for first time on oil crops such as Sesamum indicum (Pedaliaceae) and sorghum crops (Sorghum bicolor) and weed plant milkweed C.

arvensis as an alternative host plant during summer 2017, 2018 and 2019 and early winter seasons 2020.

These two species are Graptostethus servus (Fabricius) and Spilostethus pandurus Scopoli (Heteroptera: Lygaeidae) and both of them were recorded as a highly number of nymphs and adults feeding on sap of milkweed plants and oil crops (sesamum, sunflower seeds, Zea mazie , sorghum, soybean and cotton).