Response of azolla (Azolla pinnatu) to rice (Oryza sativa) herbicides

inoculated on the day of herbicide application. Jania, J. D. and Moody,K. 1981. Effect of herbicides on azolla. international Rice Research Newsletter 6

The interaction between herbicides ' and

time of inoculation (data not furnished)

Jaina, J. D. and Moody,K. 1986. Herbicides reduce revealed that the highest biomass was azolla growth. International Rice Research recorded with EPTC + 2.4-D ethyl ester Newsletter 11 (1) :28.

bldian J. Agron. 38 (1) :158-160 @farch 1993)

Herbicidal control of Johnson grass (Sorghumhalepeizse)

B. B. KANERIA, 2.G. PATEL, C.L. PATEL ANDM.K. ARVADIA

Department of Agronomy, N.M.College of Agriculture, Gujarat Agiicrtltural University,

Navsari 396 450

Received: October 1991

Control of Johnson grass [Sorghum with control were laid out in randomized lzalepense (L.) Pers.] is a problem, block design and replicated thrice. The seeds particularly in crops like sugarcane, maize of Johnson grass were sown in 1.50 m x 1.50 and sorghum. m plot. The herbicides were applied 1,2 and

A field experiment was conducted at 3 months after sowing (March-May). The Navsari during 1989 and 1990 to test the data on shoot- and root (0.25 m soil depth)- efficacy of glyphosate and dalapon in the dry weight from area were recorded 1 month control of Johnson grass. Rve treatments herbicide application at each 3 stages. consisting of 2 levels of each herbicide, i.e. Herbicides significantly reduced the dry

92 and 1,38 kg a.i.ha of glyphosate and weight of shoot at all the 3 stages of

00 and 8.50 kg a.i./ha of dalapon, along application compared with the control