Land Leeches Research Articles

16 兵庫県朝来町のヤマビルについて

16 兵庫県朝来町のヤマビルについて

5 群馬県中之条町摩耶の滝の遊歩道におけるヤマビル防除について

5 群馬県中之条町摩耶の滝の遊歩道におけるヤマビル防除について

B-33 各種殺虫剤によるニホンヤマビルの防除に関する野外試験について

B-33 各種殺虫剤によるニホンヤマビルの防除に関する野外試験について

ニホンヤマビルおよび医用ヒルよりの一群の毒素産生性細菌の分離方法ならびにこれらの細菌の細菌学的特徴の概略について

ニホンヤマビルおよび医用ヒルよりの一群の毒素産生性細菌の分離方法ならびにこれらの細菌の細菌学的特徴の概略について

Insect Repellent N,N-diethylphenylacetamide: An Update

N,N-diethylphenylacetamide (DEPA) has repellent activity against hematophagous insects including mosquitoes, black flies, horse flies, muscoid flies, rat fleas, and ticks, as well as land leeches and cockroaches. The efficacy of DEPA is comparable to that of N,N-diethyl-3-methylbenzamide (DEET) in both laboratory and field tests. Toxicological studies indicate that DEPA is safe for human use. Different formulations as well as fabrics impregnated with DEPA are effective for personal protection from insect bites.

Efficacy of Certain Essential Oils and Insect Repellents Against Land Leeches

Relative efficacy of six essential oils, viz., Cinnamon, Citronella, Eucalyptus, Orange, Pine, Spearmint and four insect repellents i.e, Dimethyl phthalate (DMP), Dibutyl phthalate (DBP), Expel and Mylol was investigated against landleeches,Haemadipsa zeylanica montivindicis Moore, under laboratory conditions. Cinnamon oil was found to be the best among the essential oils and out of repellents, Mylol and DMP were effective equally.

Studies on the Insecticidal and Repellent Properties of the Seed Extract of Tephrosia Purpurea (LINN) Pers

Laboratory and field trials were conducted to find out the insecticidal and repellent properties of petroleum ether extract of the seeds of Tephrosia purpurea. In laboratory trials contact toxicity of the extract was assessed against land leeches, houseflies, mosquitoes, rice weevil and flour beetle. In field trials, the repellency of the extract was assessed against land leeches, mosquitoes and simulium flies. In laboratory trials, the dosage required for 100 per cent mortality was 0.0005 gm/cm/sup 2/ for land leeches, 0.0157 gm/cm/sup 2/ for flour beetle. In field trials, the extract was found to be repellent against land leeches for 5 hours, mosquitoes for 4 hours and simulium flies for 5 hours.

Studies on leech repellents.

Relative repellency of 7 chemicals (hydroxy citronellal, dimethyl phthalate, diethyl- o -toluamide, diethyl- m -toluamide, diethyl- p -toluamide, N -benzoyl piperidine, and N -toluyl piperidine) was investigated against the land leech Haemadipsa sylvestris Blanchard. The index of repellency was assessed on probes repelled. Median repellency dosages and dosages which caused 90% repellency with respective χ2 test were calculated by probit analysis. Latent repellency of these chemicals was also determined. N -toluyl piperidine and N -benzoyl piperidine were found to be distinctly superior to the others.

Blood Sucking Asian Leeches of Families Hirudidae and Haemadipsidae

Abstract : The report is a general, but far from complete account of the Asian blood-sucking aquatic leeches of family Hirudidae and the land leeches of family Haemadipsidae. While other blood-sucking leeches occur in Asia, the majority of the species known as pests of man and domestic animals are land leeches of genus Haemadipsa, and aquatic leeches of genera Hirudinaria, Hirudo, and Dinobdella. In western Asia the nasal leeches of genus Limnatis are also of human and veterinary medical importance. The report contains information on the identification, distribution, and habits of each of the species discussed. Finally, information is given on personal protective measures against leeches, and on the effectiveness of insecticides, molluscicides, and natural enemies in leech control. (Author)

Land Leeches in the “Fauna of British India”-Some Corrections

Land Leeches in the “Fauna of British India”-Some Corrections

On Centropygus joseensis, a Leech from Brazil

ABSTRACT During the Percy Sladen Expedition to Brazil in 1913 Professor J. P. Hill collected six specimens of land leeches, and while I was on leave from the Australian Imperial Force in France, and acting as Demonstrator in his department, he requested me to describe them. I was glad of this opportunity, for these leeches, themselves earthworm-like in appearance, were easy to determine as close relatives of Lumbrico-b d e 11 a, that interesting leech from Brazil, which has so closely copied the form and habit of an earthworm.

Note on a Gnathobdellid Leech [Limnatis SP.?] from Angola

I owe to Prof. G. H. F. Nuttall and Mr A. E. Shipley the opportunity of examining three specimens of a West African leech sent by Dr C. Wellman from Benguella, Angola. They were described as land leeches ‘taken four or five miles from any water’ and were preserved in alcohol. A brown, vermiform object protruded from the mouth of the largest specimen.

An American Terrestrial Leech

Our common land leech was first obtained by me in April, 1876, at Normal, McLean County, Illinois, where it was dug up in a house garden, about a dozen rods from the nearest rivulet. An example sent the following year to Prof. A. E. Verrill, with some remarks on its superficial characters, was by him identified provisionally and with some hesitation as his Semiscolex grandis, originally described* from three aquatic individuals obtained from Lake Huron, Lake Superior, and West River, Connecticut. I have now, however, fifty-six specimens of this leech, all from the earth in Central Illinois, some of them half a mile or more from water, and representing collections made at different times from April, 1876, to June, 1890 ; while, on the other hand, it has not once occurred in the course of a large amount of aquatic work done in the same regions during these fifteen years. It has, moreover, constant characters which clearly distinguish it from Semiscolex qrandis as far as one may judge by a comparison with Verrill's description, and I do not doubt that it is distinct.