Asian Journal of Plant Sciences1682-39741812-5697Asian Network for Scientific Information10.3923/ajps.2004.724.727Gossypium hirsutum L.)]]>SenIhsan Mustafa Oglakci Yuksel Bolek Bekir Cicek Nefi Kisakurek Selahattin Aydin 6200436The extent of out-crossing ratio, isolation distance and pollinator insects in cotton (Gossypium hirsutum L.) was studied in a two-year study in Turkey. Plant materials were Maraş-92 (a standard variety), Mc Namara (red plant) and NGF-63 (a glandless variety). The out-crossing ratio was determined in plot combinations where Maraş-92 with Mc Namara and Maraş-92 with NGF-63 were planted separately as alternated rows and plants. The out-crossing ratio in between alternated plants was 3.75 and 4.6%, while it was 3.25 and 3.84% in between alternated rows for Mc Namara and Maraş-92 in 2001 and 2002, respectively. The same ratio was 7.5 and 13.58% in alternated plants and 5.5% and 12.61% in alternated rows for NGF-63 and Maraş-92 in both years, respectively. The out-crossing ratio for isolation distance was 3.75 and 0.25% at 1st and 12th rows, respectively, in 2001, while it was 5.6 and 0.10% in rows a1 and a13; 5.27%, 0.32% and 0.0% in rows b1, b8 and b9, respectively, in 2002. It can be concluded that 12 to13 rows (8 to 9 m) can provide good separation for isolation distance in cotton. In insect scouting, 0.046 wild bees and 0.005 honeybees in 2001 and 0.062 wild bees and 0.0077 honeybees were counted for each flower inspected in 2002.]]>Waller, G.D.,197265852861Vaisseire, B.E., J.O. Moffet and G.M. Loper,19847610051010Waller, G.D., J.O. Moffet, G.M. Loper and J.H. Martin,1985215211214Kerney, T.H.,192311346868Mulrooney, J.E., J.C. Mc Carty and Jr . R.L. Shipard,198982589592Oyekcin, C.,1977Publication No. 18,pp: 1-199pp: 1-199Moffet, J.O. and C.W. Shipman,19781978pp: 7780Xanthopoloulos, F.P. and U.E. Kechagia,20002000pp: 2732Kayaoglu, I.A.,1976Publication No. 30,pp: 1-174pp: 1-174Oglakci, M., S. Yolcu and A. Yucel,1995G. hirsutum L.) and pollinators in Harran region conditions.]]>1995pp: 5052Moffet, J.O., H.B. Cobb and D.R. Rummen,19801980pp: 268270Simpson, D.M.,19541954