Reference

Screening of insecticides against the adults and nymphs of Nilaparvata lugens Stal, the rice brown planthopper

Screening of insecticides against the adults and nymphs of Nilaparvata lugens Stal, the rice brown planthopper. Rao, P. R. M.; Rao, P. S. Prakasa (Agric. Res. Stn., A.P. Agric. Univ., Amadalavalasa 532 185, India).Several reagents with their cas registry numbers 63-25-2 and 6923-22-4 are used here. Madras Agric. J., 70(3), 175-8 (English) 1983. CODEN: MAAJAP. ISSN: 0024-9602. DOCUMENT TYPE: Journal CA Section: 5 (Agrochemical Bioregulators) Twelve com. insecticides in emulsifiable conc. and wettable powder formulations at 0.025, 0.05, 0.075, and 0.10% were evaluated against adults and nymphs of N. lugens sep. using diazinon [333-41-5] 0.05% as std. Considering the overall persistent toxicity against adults and nymphs based on PT values (Saini, M., 1959) and overall mean persistent toxicity, chlorpyrifos [2921-88-2] and carbofuran [1563-66-2] 0.05% as foliar sprays followed by quinalphos [13593-03-8] and monocrotophos [6923-22-4] are the most effective for control in the field. .

A partitioning cleanup technique using minimum quantity of hexane

A partitioning cleanup technique using minimum quantity of hexane. Moorthy, P. N. Krishna (Indian Inst. Hortic. Res., Bangalore 560 080, India). Bull. Environ. Contam. Toxicol., 32(1), 59-64 (English) 1984.Several reagents with their cas registry numbers 2310-17-0 and 122-14-5 are used here. CODEN: BECTA6. ISSN: 0007-4861. DOCUMENT TYPE: Journal CA Section: 17 (Food and Feed Chemistry) A cleanup procedure for the colorimetric detn. of insecticides in vegetables comprises dissoln. of the CH2Cl2 and acid hydrolysis ext. of a vegetable sample in 1 mL Me2CO-0.1 mL hexane, the addn. of 9 mL H2O, and sepn. of the hexane layer formed (hexane is less sol. in Me2CO than is H2O) by centrifugation. Recovery of carbofuran [1563-66-2], aldicarb [116-06-3], endosulfan [115-29-7], phorate [298-02-2], quinalphos [13593-03-8], phosalone [2310-17-0], monocrotophos [6923-22-4], fenitrothion [122-14-5], and dichlorovos [62-73-7] from spiked vegetable samples with use of the cleanup procedure gave >60% recovery for all the insecticides except endosulfan. Thus, this cleanup method, which requires low quantities of solvents, is suitable for insecticides having varying soly. in H2O. .