[Susceptibility of Aedes aegypti (L.) strains from Havana to a Bacillus thuringiensis var. israelensis].

Introduction: the integration of chemical and biological methods is one of the strategies for the vector control, due to the existing environmental problems and the concerns of the community as a result of the synthetic organic insecticide actions. The bacterium called Bacillus thuringiensis var. israelensis in liquid formulation has been widely used in the vector control programs in several countries and has shown high efficacy at lab in Cuba.

[Influence of biotic factors on the efficacy of Bacillus thuringiensis var. Israelensis against Aedes aegypti (Diptera: Culicidae)].

Introduction: Bacillus thuringiensis H-14 has shown high efficacy on Aedes aegypti larvae. But a number of factors could affect its effectiveness. Knowing these factors is of vital importance for improving the application parameters in real conditions in order to guarantee the treatment's efficiency and to reduce environmental impact.

[Macrocyclops albidus (Copepoda: Cyclopidae): a new alternative for the control of mosquito larvae in Cuba].

The cyclopoid copepod Macrocyclops albidus was evaluated as a biological control agent of Aedes aegypti and Culex quinquefasciatus larvae, culicides that frequently live in containers of domestic use in urban zones. The experiments were made under controlled laboratory conditions. Plastic containers with 5 L of dechlorinated water and 3 g of dry leaves were used.

[Some ecological aspects of larvivorous fish existing in Cayo Santa María, Cuba].

One thousand and three hundred twenty one fish from Cyprinodon variegatus, Gambusia punticulata, Fundulus grandis saguanus. Cubanichthys cubensis y Girardinus metallicus were collected for the purpose of locating and identifying fish of interest in the control of mosquito larvae in Cayo Santa Maria, Villa Clara province. Ecological indexes such as diversity (H') and equity (J') were estimated through a program named BIODIVERSITY Pro v2 and also the contents in the stomach of 341 specimens (25,81%) of the total was analyzed.

[Conduct of the oviposition of Aedes aegypti (L.) in the presence of Macrocyclops albidus (J.) and Bacillus thuringiensis var. israelensis under lab conditions].

The behaviour of the oviposition of pregnant females of Aedes aegypti in the presence of biological agents: Macrocyclops albidus (Copepoda: Cyclopoidea) or Bacillus thuringiensis var. israelensis (Bti) was evaluated under lab conditions. Recipients containing 225 mL of dechlorinated water were placed for oviposition with three variants: water with copepods, water with Bti, and water.