10 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 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.

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 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.