LARVAE OCCURRENCE AND MOTHS EMERGENCE OF THE LEAF MIDRIB MINER, COSMOPTER IX PARAR UFEL L4 RIEDL, ( LEPIDOPTERA : COSMOPTERIGIDAE), ON SUGARCANE IN EGYPT

Ocosrenoe of larvae and moth emergence of the leaf midrib miner, adirviffewIr pardrulaSia Riedl (Lepdoptea: Cosmopterigine), were studied. Mined leaves were collected weedy from pesticides - free sugarcane fields, Sacchanim officinarum 1., In Al-Alat region at Gin govenorate from September to October 2000 and from February 2001 toll October 2003. Lange Inhabit in mined tunnels of midnb on Infested plant leaves were found varied in growth stages in the (ifferent years. It was generally increased by the Offionitional activity of emerged females whist decreased gradually by developing the full- grown larvae to Ivan. Such increases were observed by mid and Late May in 2001 and 2002 as wee as 2003, mith August and late October, in all years. It declined to low numbers by early August and October in all years, also, by Late Apra ( 2001 and 2002) and early May in 2003. The full- grown larvae (about 6%) were undeveloped to pupae and lived until a range between (63- 173 days) during the different years. Emerged moths accounting for 75%, 89.2%, 74.3% and 90.6% of the total minter of failed and emerged moths in 2000, 2001, 2002 and 2003, respectively. Moths, ovenvintering as larvae emerged from late March, early and mg-A911 In 2002, 20:1 and 2003 which continued bit late May and early June in the first two years and the third one. It peaked by mid and Late April as well as early May in the three succenwe years. It considered the main source of tne new infestation. The second emergence occurred from early lily to late August in all years, but they continued a week later in 2003. A peak was attained by mid and Late July in 2002 and 2001 or 2003. However, the last erne, a..., observed by mid-September and a week later in the first and the last two years. The emergence period prolonged to early and mid-November and the moth peak was found by mid-October and late September in 2001 and 2002 as well as 2000 and 2003 The duration period from the newly hatched larvae to adult lasted means of 193, 76 and 77 days during early November- Late May, late May- mid-August and early August- late October in 2002­2003. Under both field and laboratory oinclitains, moths emerged in string, summer and auburn generations in a year. It can thus