A note on seasonal occurrence of different developmental stages of the white grub schzonycha sp. (coleoptera: searabaeidae) in sugarcane field No. 41116 at Kenana Estate-Sudan
2009
El-Nour, E.A., Kenana Sugar Company, Khartoum (Sudan). Dept. of Sugarcane Research | Hassan, A.E., Univeristy of Gezira, Wad Medani (Sudan). Faculty of Agricultural Sciences | Khafagi, R.M., Univeristy of Gezira, Wad Medani (Sudan). Faculty of Agricultural Sciences | Mohamed, Y.F., Univeristy of Gezira, Wad Medani (Sudan). Faculty of Agricultural Sciences
White grubs are the creamy-white, C-shaped larvae of scarab beetles (Coleoptera - Scarabaeidae). They are important insect pests of agricultural crops and turf worldwide (Buss, 1993). The larvae are highly polyphagous and have a wide adaptability to different hosts and can survive even on grasses in the absence of the preferred hosts, (David and Ananthanarayana, 1974; Veeresh, 1977). White grubs on sugarcane feed on the planted setts or on the roots resulting in a poor crop development. The extent of damage depends on several factors, i.e. the age, size, numbers of the grubs present and conditions of the crop. Most of the important white grub species belong to the super family Scarabaeoidae and the families Dynastidae, Melolonthidae and Rutelidae. Most species have a one-year life cycle but some have a two-year life cycle. Mated females lay their eggs in the soil around the stools base and there are generally three larval instars. The first and second generally feed on the organic matter in the soil, and the third instars causes most of the damage (James, 2005)
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