aphids                package:mixreg                R Documentation

_D_a_t_a _o_n _t_h_e _r_a_t_e _o_f _i_n_f_e_c_t_i_o_n _o_f _t_o_b_a_c_c_o _p_l_a_n_t_s _b_y _a _v_i_r_u_s
_s_p_r_e_a_d _b_y _a_p_h_i_d_s.

_D_e_s_c_r_i_p_t_i_o_n:

     The 'aphids' data frame has 51 rows and 2 columns. These
     correspond to 51 independent experiments in which varying numbers
     of aphids were released in a flight chamber containing 12 infected
     and 69 healthy tobacco plants.  The resulting number of infected
     plants was recorded.

_U_s_a_g_e:

     data(aphids)

_F_o_r_m_a_t:

     This data frame contains the following columns:

     '_n._a_p_h_i_d_s' the number of aphids released in the flight chamber in
          each instance

     '_n._i_n_f' the resulting number (out of a possible 69) of infected
          plants

_D_E_T_E_R_M_I_N_A_T_I_O_N _O_F _I_N_F_E_C_T_I_O_N:

     After 24 hours, the flight chamber was fumigated to kill the
     aphids, and the previously healthy plants were moved to a
     greenhouse and monitored to detect symptoms of infection.  The
     number of plants displaying such symptons was recorded.

_S_o_u_r_c_e:

     These data appear courtesy of Gilles Boiteau and George Tai of the
     Potato Research Centre, Agriculture and Agri-Food Canada,
     Fredericton, New Brunswick.  Any published work using these data
     should cite the paper given in the *References*.

_R_e_f_e_r_e_n_c_e_s:

     Boiteau, G., M. Singh, R. P. Singh, G. C. C. Tai, and T. R. Turner
     (1998).  Rate of spread of PVY-n by alate Myzus persicae (Sulzer)
     from infected to healthy plants under laboratory conditions. 
     Potato Research, vol. 41, pp. 335 - 344.

