En la Tabla I se aprecia como efecto agudo (dia 1) de la administracion de malathion
un aumento estadisticamente significativo en las celulas espermatogoniales del tipo B y en paquiteno, efecto que igualmente se observa en espermatidas redondas y alargadas por tubulos.
It was not possible to calculate this rate for the aphids exposed to malathion
because all the individuals died within 24 hours.
, an organophosphorus pesticide for a large variety of pests, has been widely used in agriculture .
, it was resistant in 14 districts, verification required category in 10 districts and susceptible in eight districts.
For linearity study, bean samples were spiked with standard solutions of the analytes: diazinon (0.24-8.56 [micro]g [g.sup.-1]), ethion (0.86-13.67 [micro]g [g.sup.-1]), fenitrothion (0.56 [micro]g [g.sup.-1], internal standard), malathion
(0.52-18.87 pg [g.sup.-1]), methyl parathion (0.23-8.14 [micro]g [g.sup.-1]) and methyl pirimiphos (0.28-10.25 [micro]g [g.sup.-1]).
and its cousins, which have been around for almost 60 years, are very hazardous to humans as well as insects.
trichlorfon (98%) Jiangsu Anpon China malathion
(95%) lambda-cyhalothrin (98%) Jiangsu Huangma Agrochemicals China bifenthrin (95%) methomyl (93%) Agro-Care Chemical China and spinosad (95%) Shenzhen Crop Star Chemical China were used in different concentration prepared in acetone (98%) Riedel -de HaAn Germany for present study.
is used for agricultural purposes to kill and control insects on crops and in gardens.
For the measurement of rate constants of inhibition ([k.sub.i]), esterases enzyme activity was inhibited with 2 mM malathion
, parathion, or trichlorfon concentrations or 4 mM methomyl concentration resulting in an inhibition of 83-99% of control activity.
In a study on effects imparted to immune system function, decreases in hemocyte counts were recorded in cockroaches that were exposed to malathion
(Saxena & Saxena 1985) and crickets that were treated with parathion (Patton 1961).
rubrocinctus the concentration ranges of the second assay varied between 0.0001 and 1 [micro]g per mL for spinosad, and between 4.10 to 1,000 [micro]g per mL for malathion
We used a bacterial consortium composed of Pseudomonas sp and Enterobacter sp isolated samples of cultivation plots in Los Mochis-Sinaloa (Mexico), the isolates showed metabolic activity and resistance against carbofuran, malathion
and 2,4-D (9).