huasahuasi             package:agricolae             R Documentation

_D_a_t_a: _R_a_i_n_f_a_l_l _t_h_r_e_s_h_o_l_d_s _a_s _s_u_p_p_o_r_t _f_o_r _t_i_m_i_n_g _f_u_n_g_i_c_i_d_e _a_p_p_l_i_c_a_t_i_o_n_s _i_n _t_h_e _c_o_n_t_r_o_l _o_f _p_o_t_a_t_o _l_a_t_e _b_l_i_g_h_t _i_n _P_e_r_u

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

     Timing fungicide sprays based on accumulated rainfall thresholds
     can be a successful  component of integrated management packages
     that include cultivars with moderate  or high levels of resistance
     to late blight. The simplicity of measuring accumulated rainfall
     means that the technology  can potentially be used by
     resource-poor farmers in developing countries.

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

     data(huasahuasi)

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

     The format is: List of 2 ( AUDPC, YIELD )

     '_b_l_o_c_k' a factor with levels 'I' 'II' 'III'

     '_t_r_t' a factor with levels '40mm' '7-days' 'Non-application'

     '_c_l_o_n' a factor with levels 'C386209.10' 'C387164.4' 'Cruza148'
          'Musuq' 'Yungay'

     '_y_1_d_a' a numeric vector, Kgr./plot

     '_y_2_d_a' a numeric vector, Kgr./plot

     '_y_3_r_a' a numeric vector, Kgr./plot

     '_d_4_4' a numeric vector, 44 days

     '_d_5_1' a numeric vector, 51 days    

     '_d_1_0_0' a numeric vector, 100 days    

_D_e_t_a_i_l_s:

     The experimental unit was formed by 4 furrows of 1.8 m of length,
     with distance  between furrows from 0.90 m and between plants of
     0.30 m. In each furrow was  installed 5 plants. The experiment had
     3 repetitions.  From the beginning of the experiment were
     fulfilled the following treatments Thresholds 40 mm: Apply the
     fungicide when 40 precipitation mm accumulates.  The minimum
     interval between applications will be of 7 days.  Schedule 7 days:
     The applications should be carried out every 7 days calendar. 
     Without application: No fungicide application will be made.  The
     evaluation of the severity of the late blight in each treatment
     started to  emergency 80 percentage and then evaluations were made
     every 7 days until being observed  a physiological maturation of
     the crop.

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

     Experimental field, 2003. Data Kindly provided by Wilmer Perez.

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

     International Potato Center. CIP - Lima Peru.

_E_x_a_m_p_l_e_s:

     library(agricolae)
     data(huasahuasi)
     names(huasahuasi)
     str(huasahuasi$AUDPC)
     str(huasahuasi$YIELD)

