| dc.contributor.author | Nyamasyo, Gideon Howard N | |
| dc.date.accessioned | 2013-09-26T08:57:10Z | |
| dc.date.available | 2013-09-26T08:57:10Z | |
| dc.date.issued | 1978 | |
| dc.identifier.citation | Gideon Howard Nzioka Nyamasyo .(1978). Studies On The Insecticide Resistance In Cotton Stainers. Dysdercus Spp. (hemiptera:pyrrhocoridae), In Kenya.A Thesis Submitted In Part Fulfilment For The Degree Of Master Of Science (entomology) In The University Of Nairobi. | en |
| dc.identifier.uri | http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/56811 | |
| dc.description.abstract | 1. In the present investigation field and
laboratory strains of four species of cotton
stainers, Dysdercus fasciatus, Q. nigrofasciatus,
D. superstitiosus and Q. cardinalis, were used
to study the insecticide resistance phenomenon.
2. Three insecticides, technical grades
carbaryl (99.9% pure), lindane (99.9%) and
methidathion (92.7%),were used. Each insecticide
was diluted with solvent Isobutyl methyl ketone
into 9 different concentrations ranging from
29.3 to 10,000 mg/l.
3. The different instars of the two sexes
of D. fasciatus showed varying susceptibilities
to carbaryl. The 4th instar nymphs (mixed sexes)
gave an LC50 of 102.76 mg/l while the 5th
instar male and females gave LC50,s of 121.08
.and 371.76 mg/1, respectively. The adult males
and females showed LC50,s of 664.20 and 694.20
mg/~respectively. The 5th instar 4-dayold
female was found to be the most convenient stage
to do bio-assays with. | en |
| dc.language.iso | en | en |
| dc.publisher | University of Nairobi | en |
| dc.title | Studies on the insecticide resistance in cotton stainers. Dysdercus Spp. (hemiptera:pyrrhocoridae), in Kenya. | en |
| dc.type | Thesis | en |
| local.publisher | School of Biological Sciences, | en |
