Evaluation of Certain Insecticides and Repellents Against Ticks

The susceptibility of two commonly occurring species of Ixodid ticks viz., the cattle tick, Hyalomma anatolicum anatolicum Koch and the brown dog tick, Rhipicephalus sanguineus Latr to certain newer insecticdes was investigated under controlled environmental conditions. The repellency of diethyl toluamide (Deet) to the two species of ticks was also investigated by a specially devised laboratory technique. It was found that based on LC/sub 50/ values, the two species were most susceptible to pyrethrins followed by carbaryl whereas malathion was found least toxic to the ticks

Susceptibility of Bed Bugs to Insecticides

The susceptibility of a normal laboratory strain of the bed bug, cimex hemipterus fabricius to certain synthetic insecticides, viz. dieldrin, diazinon and malathion was investigated in relation to DDT and lindance. The data were subjected to probit analysis. It was found that diazinon was the most effective insecticide, as residual films on filter papers, and was followed by malathion, lindane and DDT/dieldrin. It was also found that c. hemipterus was fairly susceptible to all the insecticides investigated

Studies on contact toxicity-part v: residual activity of DDT applied in admixture with glue-dichromate on mud surface.

Residual activity of DDT applied in admixture with gluedichromate on mud surface has been investigated against the housefly, Musca nebulo Linn. and the mosquito, Culex fatigans Wied. It has been found that the addition of gluedichromate to DDT dispersion in water or DDT emulsion considerably enhances the residual activity of the insecticide against flies and mosquitoes. The practical value of the results has been discussed

The effect of temperature and humidity on the susceptibility of flour beetles to insecticides

The susceptibility of the flour beetle, Tribolium castaneum Herbst. to DDT and dieldrin was investigated at different controlled conditions of temperature and humidity . It was found that the susceptibility was influenced significantly by temperature though not by humidity. DDT exhibited negative temperature coefficient for dieldrin was positive. T. Castaneumwas found to be more susceptible to DDT to DDT at 20-25degree than at 30-35degree celcius whereas the insect was more susceptible to dieldrin at 30-35 degree celcius than at 20-25degree celcius

Metallic oxides as barrier treatments for prevention of attack by light on cellulose

Although the literature contains evidence of sporadic attempts to investigate various types of barrier treatments on cellulose for the prevention of attack by light, no systematic work would appear to have been carried out to date on the subject. The evidence is often conflicting, as in the case of iron compounds and in any event the mechanism of protective action of such diverse barriers as have been studied is not clear. In the course of a wider investigation on the elucidation of the mechanism of attack by light on cellulose, which is in progress in this Laboratory, it was considered of immediate practical importance to study on systematic lines the influence of certain metallic oxides deposited on cotton fabric in protecting the latter against actinic attack. While the details of the technique of investigation and the results obtained, particularly on the chemical aspect of protection/deterioration of cellulose, are reserved for a future publication, it is the object of the present note to direct attention to the remarkable effect of manganese (as oxide) in inhibiting actinic deterioration

The Effect of Temperature and Humidity on the Susceptibility of Flour Beetles to Organophosphorus Insecticides

The effect of the temperature and humidity on the susceptibility of Tribolium castaneum Herbst. to malathion and diazinon, has been investigated. It has been found that temperature significantly influences the susceptibility of T. castaneum to malathion though not to diazinon. Humidity, however, influences the susceptibility if the insect to both insecticides

Development of a standard test method for evaluation of insectproofness of woollen textiles

Factors governing the standardization of test methods for the assessment of insect proofness of woolen textiles have been critically examined. A standard test method using the woolly bear, Anthrenus fanipes Lec. and the case-bearing clothes moth, Tinea pellionella Linn. has been developed

Mode of action of DDT on the housefly, Musca nebulolinn

The penetration of topically applied DDT through the cuticle of the housefly, Musca nebulolinn. and its transference and distribution in various tissues of the insect have been studied. The detoxification and excretion of the insecticide from the housefly has also been investigated. The mechanism of intoxication and detoxification of DDT in nerve ganglion has been found to be similar to that in the whole fly. The nature of the solvent used in the application of the insecticide influences the penetration and detoxification of the toxicant

Insecticide susceptibility of cimex hemipterus

The susceptibility of the bed bug, cimex hemiptelus fabricius, to certain synthetic contact insecticides, viz., DDT, lindane dieldrin, diazinon and malathion was investigated. The fifth nymphal stage of the insect was found to be more tolerant to insecticides than other nymphal instars or the adult bed bug

The efficacy of dieldrin against wool destroying insect

The efficacy of dieldrin as a protection against the wool destroying insects. Anthrenus flavipes Lec. (wooly bear) and Tinea pellionella Linn. (case bearing clothes moth) has been investigated. In very low concentrations (0.02-0.05percent on the weight of fabric), the insecticides offers adequate protection against both the insects. the effectiveness of treatment is not impaired by laundering (12 times) or dry-cleaning (12 times). The resistance to laundering and dry-cleaning is not, however, as satisfactory when the insecticide is applied from solution. The economics of utilization of dieldrin as a protectant against the wool destroying insects has been discussed in relation to DDT, and it is shown that the former insecticide is much less expensive