| field study on exposure and health effects of an organophosphate pesticide for maintaining registration in the philippines. | to support the continued use and the registration of monocrotophos, a field study was conducted at calauan, laguna, the philippines, to assess exposure and the resulting health risk to 21 spraymen applying monocrotophos to rice crop by knapsack spraying during 3 consecutive days. the findings of the study were as follows: exposure of uncovered hands and of the skin of the back to the concentrate was visually observed during the filling, and respectively loading operations; during spraying exposu ... | 1990 | 2100760 |
| ecological observations on lymnaea (bullastra) cumingiana. | field surveys conducted at echague, isabela and san pablo, laguna revealed that lymnaea (bullastra) cumingiana, the natural second snail intermediate host of echinostoma malayanum in the philippines, exhibits a moderate degree of diversity in its choice of habitats. rice fields of all stages of development, stagnant shallow streams and springs are the main areas where the snail can be collected from at echague, isabela. however, they were absent in rice fields that had been extensively sprayed w ... | 1993 | 8160069 |
| comparison of nucleotide sequences between northern and southern philippine isolates of rice grassy stunt virus indicates occurrence of natural genetic reassortment. | rice grassy stunt virus is a member of the genus tenuivirus, is persistently transmitted by a brown planthopper, and has occurred in rice plants in south, southeast, and east asia [corrected]. we determined the complete nucleotide (nt) sequences of rnas 1 (9760 nt), 2 (4069 nt), 3 (3127 nt), 4 (2909 nt), 5 (2704 nt), and 6 (2590 nt) of a southern philippine isolate from south cotabato and compared them with those of a northern philippine isolate from laguna (toriyama et al., 1997, 1998). the num ... | 2000 | 10612657 |