In this paper effects of the static electric field on the life system of Culex pipiens pallens were measured by treating its eggs with different expose duration and different electric field tensions.Results showed that the static electric field had an important influence on the post-blast development of the mosquito.In the electric field tension of 100KV/m ²,the shorter the expose duration was.the less efficiency on the biological property of the mosquito the electric field had.The survival rate of larvae whose eggs were treated for 90 min.was only 0.58.In the expose duration of 30 min.,that of the electric field tension of 50KV/m ² was favourable to the development of the mosquito.but the higher electric field tension would repress its development.In the electric field tension of 250KV/m ², about half of the eggs laid by females was unfertilized. The electric field also affected the developmental rate of larvae.Finally,the reasons of the efficiency of static electric field was inferentially discussed.

Laboratory studies on the bionomics of Culex pipiens pallens indicated that the mosquito's ponotrophic cycle was 6.7 dayS and its egg-raft had 94.2 eggs on the average. The egg-hatching rate and the survival rate of larvae and pupae reach more than 90%. The adult's average life span is about 27 days.The mosqu ito can mate on the second day after emergence and the fertilization rate can reach more than 50% after five days of its emergence.One male cna mate successfully with several females,but can't do in small space. The number of eggs which one female produces on the average is 341.07, net reproductive rate is 170.5703 and innate capacity of population increase is 0.1995. The population of the mosquito would increase almost by 400 folds in about 30 days. So the mosquito has great vitality and fecundity.These results are discussed in the context of filariasis transmission.

Field trials on the control of An.dirus using deltamethrin-impregnated door and window curtains with big holes were conducted.The dose of the insecti cide employed was 25mg/m ² and satisfactory results have been obtained.The average density of An.dirus in the experimental villages was reduced by 71.2% four months after the trial and the average mosquito density in the houses at daytime was reduced by 94.9%.Sampling tests of the deltamethrin-impregnated door and window curtains were also completed as described by Hossain & Curtis,the results showed that the mortality rate of An.dirus was 92.4% 140 days after the trial and their bloodsucking activities were obviously affected.

It was reported that the residual effect of S-31183 0.5G for Mosquito control in ponds and dairy wasterwater drain was evaluated by the methods of dipper and larval isolation,S-31183 0.5G against mosquitoes provided effective inhibition of emergence for 21～49 days at 12.5～100mg a·i/m ² in the ponds and 28 days at 100 mg a·i/m ² in the drain, It showed superiority and long term control for mosquito breeding source.

With isoelectric focusing(IEF),we compared the proteins and esterase isoenzymes of the female, male adults,pupae,larvae and eggs of Musca demestica from 5 districts in China, and found 24, 24, 21,22,23 and 11, 13, 10,8,7 bands(Nanjing);25, 26, 24, 26, 34 and 16,11,19, 16, 4bands(Changsha) ;23,27, 28,29, 34 and 10,9, 14,8, 6 bands(Yinchuan); 25, 27,24, 31, 36 and 11,12,9,8, 7 bands (Changchun); 26, 31, 27, 31, 38 and 12, 14, 15, 15, 5 bands (Wurumqi).The most protein bands and the least esterase isoenzyme bands were found in the eggs, and the most bands in the flies from Wurumqi.

This paper reports the penetrating energy to seek hosts of the Nasonia vitripennis and Spalangia endius by using matrix such as soil,sand, dry wheat bran and ferment wheat bran. N.vitripennis can only penetrate 1 cm of ferment wheat bran to seek and parasitize the housefly pupae. S.endius can penetrate 1,3, 5 cm of soil and ferment wheat bran and 1 cm of sand to seek and parasitize the housefly pupae. The soil is the favourite matrix for S.endius to seek the hosts.

The cockroach elimination activity was carried out at 32417 troops from 1991-1993. Adult and nvmph infestation rate dropped from 47.5% to 1.5% and the average density index(individal/room) dropped from 21.3 to 3.2.Ootheca infestation rate droped from 2.1 to 1.4. After control activity,all index reached the "double five" and"double two" standards.

Altogather 888 small mammal samples were collected in Anning valley in Liangshan Yi Nationality Autonomous Prefecture,Sichuan Province during 1988.They were identified 18 species, belong to 10 genera, 4 families. 2 orders.Based on the analysis of the composition of small mammals in different inhabitat and their elements of fauna, author thinks that Anning valley is belong to Oriental Region in the light of material summed up by the predecessors.

It was not until 1960' that Broun rat( Rattus norvegicus)was discovered in Xinjiang, which was carried into Xinjiang by railway from the interior of the country.Ithas formed stable population in Tulufan town,kuerle city and the Urumqi Railway Station and its surounding areas,and is spreading to other reg ions of xinjiang by railway or highway.Under these circumstances,the habitat,quantity,harm and controlling measures of R.norvegicus were studid.

The Shashuxing by lianing chemical industry Research Instituse in 1992, It is Indandione anticoagulaunt rodenticide. This paper repodts the results of the toxicity defermination and palatability obser Vation and efficency elimination of Shashuxing for the Meriones ungiculatus.The values of acute(single close)oral toxicity LD ₅₀ is 2.8255±1.7674mg/kg.SE ₅₀ is 0.1390,The lincar regression equation is Y=3.4317±3.4766x. The poisoning bait of Shashuxing is of good accepfance,The coefficient of taken wheat bait at concentration of 0.005% of pesticide agent for M. ung.is 1.3330.In field test,0.0025 0.005 0.01% of taken wheat baits 2 gram per borrow putting the killing rate was 97.98%. 100% 100%respecfively.affer eleven days calclated the rate of distincf borrow. The results confirmee that Sha shuxing possessed Very stronger toxicity and death period is mild and palatable for M. ung.is ideal rodenticidi for pesf control.

Nosopsyllus-1aeviceps kuzenkovi,Frontopsylla luclenta and Amphjpsylla prim aris are plague vector fleas. To observe the biting and blood-sucking abilities of these three species fleas on mankind,the tests were carried out under the laboratory condition. Test results showed that the highest percentage of blood sucking was for N. laeuiceps kuzenkovi then for F. luculenta and the lowest for A. primaris.of all these three species of fleas have the biting and blood-sucking abilities on mankind,especially when the fleas are confined on the forearms of mankind,the blood-sucking percentage of female and male were 92.31% and 96.36% for N. 1. k., 66.07% and 59.26% for F.1.,4.84% and 3.30% for A.prespectively These abiliti esof fleas have an important significance fore understanding the possibility of the plague transmission from nature to mankinds.

This paper reports nine cases of tsutsugamushi disease in new residence area of Xiamen from June 1990 to October 1992.After investigations of epidemiology,we have found that the environment sanitation was terrible, All these show that it has become the epidemic focus area of the tsutsugamushi disease and might bring about its epidemic. So we suggest that special attentions should be payed to improve environment sanitation and deratization.