14 results about "Mosquito larvae" patented technology

The invention belongs to the technical field of mosquito larva prevention and control, and particularly relates to a mosquito-killing spreading oil agent and a preparation method and application thereof.The mosquito-killing spreading oil agent is composed of nerolidol, eugenol, methyl oleate, surfactants OP-4 and OP-10 and oleic acid, the mass percent of methyl oleate is 85%, the mass percent of a mixed preparation prepared from the surfactants OP-4 and OP-10 according to the mass ratio of 1: 1 is 5%, and the mass percent of oleic acid is 5%. The mosquito larva killing rate of the film spreading oil agent product within 60 minutes is 100%. Under the same condition, the effect of the insecticidal composition is better than that of pyrethrin, and the insecticidal speed is higher. The film spreading oil agent can reduce the chemical pesticide resistance of deet, and also can achieve the effects of environmental protection and efficient killing of mosquito larvae.

The present invention describes capsule compositions consisting of crosslinked chitosan, beta-glucan or alginate, and encapsulates an environmentally compatible ingestible larvicide, especially larvicidal agents such as essential oils or other ingestible larvicides such as Bacillus thuringiensis which are lethal to the larvae of pest insects, especially mosquito larvae.

The present invention relates to a device for releasing an insecticide suitable for controlling mosquito larvae. The device comprises a reservoir containing a preparation of at least one insecticide having larvicidal properties, wherein the reservoir comprises an outlet for releasing the preparation of the at least one insecticide. The device further comprises a gas-generating cell configured to build up a pressure by means of gas generation, wherein the device is configured such that pressure built up by the gas-generating cell causes movement of the preparation of the at least one insecticide out of the outlet of the reservoir. The invention also relates to method for controlling mosquito larvae, in particular by releasing a preparation of at least one insecticide having larvicidal properties, using a device according to the present invention.

The utility model discloses an appreciable aedes egg trapping and larva killing device which comprises a water collecting cylinder with an opening in the upper end, a plurality of through holes are inwards formed in the position, close to the upper end of the water collecting cylinder, of the outer wall of the water collecting cylinder, the opening end of the water collecting cylinder is detachably connected with a cylinder cover, and the left side and the right side of the bottom of the cylinder cover are detachably connected with medicine storage boxes. A water absorption rope is arranged on one side of the inner wall of the barrel cover and corresponds to the bottom of the medicine storage box, a foaming floating net capable of floating on the water surface is placed in the water collection barrel, a placing hole is downwards formed in the middle of the upper end of the outer wall of the barrel cover, and the placing hole is detachably connected with a green plant cultivation pot matched with the placing hole. The water collection cylinder, the cylinder cover and the green plant cultivation pot are all made of black opaque materials. The aedes trapping and killing device is simple in structure, aedes are trapped and killed by fully utilizing the biological habits of aedes, the aedes can be lured to inhabit and lay eggs in a concentrated mode, aedes larvae can be killed in batches by using a small dosage of larva killing agent, the aedes population density can be effectively restrained, and the disease transmission risk can be reduced.

Images of an insect larva are subjected to at least a first convolutional neural network to develop feature maps based on anatomical pixels at corresponding image locations in the respective feature maps. The anatomical pixels correspond to a body part of the insect larva. A computer uses a plurality of feature maps form an integrated feature map and bounding boxes on anatomical pixels corresponding to a head, thorax, abdomen, or terminal abdomen area of the insect larva. A classification network identifies the genus, the species, the sex, or the life stage of the insect larva.

This invention relates to the field of biotechnology, specifically to the application of a crude extract of a fungal metabolite, 101H12, in the preparation of mosquito repellents. The LC50 of the crude 101H12 extract against Culex pipiens mosquito larvae is also discussed. 50 The concentration was 31.90 mg / L. The LC50 of component 3 in the crude extract against Culex pipiens larvae was... 50 The concentration was 12.13 mg / L, which is the main component with insecticidal activity. Further isolation and identification yielded two monomeric compounds, vermistatin and dihydrovermistatin. The LC50 of both compounds against Culex pipiens larvae was determined. 50 The concentrations were 28.13 mg / L and 83.87 mg / L, respectively. The crude fungal extract 101H12 and the monomeric compounds vermistatin and dihydrovermistatin of the present invention can be used to prepare insecticides.

The invention discloses a spreading oil sanitary insecticide for spawning female mosquitoes and water breeding environment larvae, which is composed of 5-20% by mass of polydimethylsiloxane, 5-20% by mass of surfactant, 5-20% by mass of film-forming agent, 5-20% by mass of film stabilizer and the balance of edible oil, and the spreading oil sanitary insecticide comprises the following components in percentage by mass: 5-20% by mass of surfactant, 5-20% by mass of film-forming agent, 5-20% by mass of film stabilizer and the balance of edible oil. The mass percentage concentration of the surfactant is 2%-15%, the mass percentage concentration of the film-forming agent and the film stabilizer is 10%-40%, and the balance is edible oil substances. The invention also provides a preparation method of the spreading oil agent. After being dripped on the water surface, the mosquito killer disclosed by the invention can quickly diffuse, float and spread on the water surface to form a layer of oil film without medicine components, and after mosquito larvae are in contact with the oil film on the water surface during breathing, the mosquito larvae at all stages can be quickly killed, spawning female mosquitoes can also be actively killed, and hatching of newly-laid mosquito eggs can also be prevented for a long time.

The invention relates to a compact, low-profile aquatic trap designed to be directly submerged in mosquito larval habitats, aimed at capturing and retaining them underwater long enough to kill them by lack of air. The entrance of the trap includes multiple niche-like openings to trap the larvae by offering them shelter from light and predators. These entrances lead to a series of compartments that form a labyrinth guiding the larvae towards an inescapable chamber. Being anaerobic, the trap causes the larvae to die in the inescapable chamber within a few hours, without bait, chemicals, energy, or any kind of refills.

The application provides a method for evaluating the feeding behavior of mosquito larvae and application thereof, and belongs to the technical field of insect feeding. The application provides a method for evaluating the feeding behavior of mosquito larvae, wherein after yeast dyed by aniline blue is used as feed to feed mosquito larvae, the feeding level is reflected according to the content of aniline blue in the mosquito larvae; the application also provides application of the method in screening and / or developing drugs for regulating the feeding behavior of mosquito larvae. The examples show that the method can accurately reflect the change of the feeding behavior of mosquito larvae, and has important significance for screening and / or developing drugs for regulating the feeding behavior of mosquito larvae and then inhibiting the growth and development of the mosquito larvae.

This invention discloses an environmentally friendly, multifunctional spreading agent, its preparation method, and its application. The spreading agent consists of a plant-derived base oil, a composite film-forming system, a natural surfactant, and a synergist. The mass percentages of each component are: plant-derived base oil 40%-65%, composite film-forming system 15%-30%, natural surfactant 5%-15%, synergist 2%-8%, and the remainder is an environmentally friendly solvent. This spreading agent contains no chemical pesticide components and achieves targeted biological control through physical sealing and interfacial tension regulation. It features rapid spreading speed, large coverage area, long-lasting effect, and environmental friendliness. This spreading agent can quickly form a uniform and dense oil film on the water surface, effectively killing aquatic pests such as schistosomiasis cercariae and mosquito larvae. It also has an auxiliary control effect on pests and diseases of aquatic crops such as rice and water chestnuts.

The present application relates to a kind of mosquito larvae development age identification method based on mosquito larvae head length and eye distance, belong to insect identification technical field.The present application provides a kind of mosquito larvae development age identification method, according to the numerical value of mosquito larvae head length and / or eye distance is determined.The present application takes mosquito larvae head length and eye distance as core morphological parameter, with the advantages of fast determination speed, wide application scene, improve the stability and accuracy of age determination.The present application further establishes the mathematical scoring model between head length and eye distance and development age, converts the morphological parameters measured into the score value that can be calculated, realizes the change from experience judgment to vector determination, with stronger objectivity, standardization degree and repeatability.In Toxorhynchites speciosus, Aedes albopictus and Culex quinquefasciatus, it has strong applicability.

The present work discloses polymeric bead formulation and process for preparation the same. The polymeric bead formulation comprise fennel oil as a extended release system for insecticidal activity against Aedes agypti, Anopheles stephensi, and wild mosquito larvae. This study was carried out by emulsifying fennel oil in an aqueous sodium alginate solution blended with HPMC and the fabrication of beads was then followed by an ionotropic gelation method using CaCl2 as a cross-linker. The in-vivo larvicidal bioassay showed that the fennel oil-loaded polymeric beads resulted in 100% mortality of Aedes agypti, Anopheles stephensi, and wild mosquito larvae within 24 hours. These results confirm that the fennel oil-loaded polymeric beads exhibited good entrapment efficiency, extended release property, and excellent insecticidal activity.

The invention discloses a new application of a veratrum nigrum rhizome extract in killing mosquito larvae, and belongs to the field of sanitary insecticides. According to the invention, the veratrum nigrum rhizome extract is used as an active component to prepare the mosquito larva killing preparation, and the preparation is in the form of a suspending agent, an emulsion or a microemulsion and is applied to killing mosquito larvae. When the veratrum nigrum rhizome extract is used as the active component of the mosquito larva killing preparation, the use amount is 12.5 mg / L to 50 mg / L (based on the effective component of veratrine). Experiments prove that the veratrum nigrum rhizome extract has killing activity on mosquito larva and can be prepared into mosquito larva killing preparations to be applied to the field of sanitary insecticides.

The invention relates to a factory-like black-spot pike large-scale fry breeding method, and belongs to the technical field of aquaculture. In order to solve the problem that the death rate is high in the large-scale breeding process of black-spot dog fish fries, the invention provides a factory black-spot dog fish large-specification fry breeding method which comprises the following steps: disinfecting breeding tools, hatching fertilized eggs and breeding fries in a gradient heating manner: raising the water temperature to 18-20 DEG C from 8-10 DEG C in a staged gradient manner, and raising the temperature to 18-20 DEG C from 8-10 DEG C; in the breeding period, fairy shrimps, female chironomidae larva living bodies and bait fishes are used as live baits in sequence, through reasonable breeding density and appropriate feeding management, the situation that fries have self-disability behaviors due to narrow space or fighting for food is avoided, the survival rate and health level of the fries are remarkably improved, the problem that the death rate is high easily due to water mildew breeding is solved, and the survival rate of the fries is increased. Powerful guarantee is provided for large-scale breeding of the black-spot pike, wild black-spot pike resources are protected, and sustainable development of the black-spot pike breeding industry is promoted.