RESUMEN
A field experiment was conducted at Potato Research Station, S. D. Agricultural University, Deesa during 2018-19 and 2019-20 for evaluation of efficacy of insecticides against whitefly in potato. The seven different treatments viz. T1: Control, T2: Seed treatment with imidacloprid (200 SL) @ 0.04% followed by foliar sprays of imidacloprid @60 gm a.i./ha at 85% emergence + second spray with thiamethoxam 25WG @100g a.i./ha, T3: Foliar spray of diafenthiuron 50WP 350 g a.i. at 85% emergence, T4: Foliar spray of diafenthiuron 50WP 350 g a.i. at 85% emergence followed by second spray of diafenthiuron after 10 days, T5: Foliar spray of castor oil @0.05% at 85% emergence, T6: Foliar spray of diafenthiuron 50WP 350 g a.i. at 85% emergence mixed with castor oil @0.05%, T7: Foliar spray of diafenthiuron 50WP 350 g a.i. at 85% emergence mixed with castor oil @0.05% by second spray with diafenthiuron after 10 days. Based on pooled data of two years, the significantly highest per cent reduction (i.e. 68.57 %) after 2nd spray was recorded in T7 i.e. foliar spray of diafenthiuron 50WP 350 g a.i. at 85% emergence mixed with castor oil @0.05% by second spray with diafenthiuron after 10 days which was at par with T4 (Foliar spray of diafenthiuron 50WP 350 g a.i. at 85% emergence followed by second spray of diafenthiuron after 10 days). The tuber highest yield and benefit cost ratio were also recorded with T7.
RESUMEN
X-band electron paramagnetic resonance (epr) spectra of the binary systems, BSA-copper(II) (1:1 and 2:1), and the ternary systems, BSA-Cu(II)-aminoacid (1:1:1), are described. In the binary system, two distinct epr features have been observed. One of the features (towards the low pH), showing broad and overlapping epr signals, has been attributed to non-specific bonding of copper(II) to the albumin and other feature (towards higher pH), showing sharp intense epr signals, has been attributed to the specific bonding. The change from non-specific to specific binding is favoured by increase in pH as well as by increase in protein concentration. Specific binding of copper(II) in BSA-Cu(II) has been suggested to be similar to that in HSA-Cu(II). Spectra of BSA-Cu(II)-aminoacid (1:1:1) show simultaneous presence of binary BSA-Cu(II) and ternary BSA-Cu(II)-aminoacid.