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Algicidal organisms

A technology of algae and composition, which is applied in the field of composition to control various algae, and can solve problems such as difficulty in success

Inactive Publication Date: 2019-10-11
MARRONE BIO INNOVATIONS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although several avenues for eliminating blooms have been proposed, those avenues have been seldom successful

Method used

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example

[0067] The compositions and methods described herein are further illustrated in the following non-limiting examples. The examples are merely illustrative of various embodiments and do not limit the claimed invention in terms of materials, conditions, weight ratios, process parameters, etc. recited herein.

example 1

[0069]Beauveria bassiana O379 (NRRL-67406) is a fungus that was discovered as an initial hit on Pesudokirchnneriella subcapitata, and its activity in Pesudokirchnneriella subcapitata and Chlamydomonas reinhardtii) are verified on both. The microorganism was identified by its ITS sequence as Beauveria bassiana O379 (NRRL-67406). Beauveria bassiana O379 (NRRL-67406) had the broadest activity of any algicide for the validated hit. It was active against all species it had been screened against and was greater than 75% active against all species except Microcystis aeruginosa. However, as shown in Table 1, the LC50 of Beauveria bassiana O379 (NRRL-67406) was somewhat higher than other top hits, specifically higher for green algae.

[0070] Beauveria bassiana O379 (NRRL-67406) had moderate control over Anabaena spp. but no control over overall chlorophyll A content when tested in a system simulating an algae-infested rice field.

[0071] Table 1 Summary of antibacterial spectrum a...

example 2

[0102] It was found that Bacillus brevis HNYM3, O989 (NRRL-B67408) was successfully verified on Chlamydomonas reinhardtii, and was identified as Bacillus brevis HNYM3, O989 (NRRL-B67408) by 16S rRNA. The fermented supernatant of Bacillus brevis HNYM3, O989 (NRRL-B67408) was tested on a broad spectrum of algal species and found to have a very broad spectrum of activity. The only species tested in which the Bacillus brevis was not active was the green alga Scenedesmus tetracerus. Its activity was greater than 75% against all remaining species except Oscillatoria teniella. As shown in Table 8, the LC50 of Bacillus brevis HNYM3, O989 (NRRL-B67408) was moderately low.

[0103] When tested in a system simulating an algae-infested rice field, Bacillus brevis HNYM3,O989 (NRRL-B67408) showed no significant change in chlorophyll A content and phycocyanin at four and seven days after treatment. content increased significantly. This suggests that Bacillus brevis HNYM3,0989 (NRRL-B67408...

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Abstract

Provided are compositions derived from Beauveria bassiana, Brevibacillus brevis, Streptomyces spororaveus, Paenibacillus elgii, or Streptomyces sp. fermentation, having algicidal properties, and method of use thereof.

Description

technical field [0001] The present disclosure relates to compositions and methods for controlling various algae. Background technique [0002] Toxic algal blooms are already widespread in lakes, reservoirs and rivers around the world. Blooming kills livestock and threatens human health and aquatic ecosystems. Although several approaches to eradicating blooms have been proposed, those approaches have been seldom successful. There is no way to completely remove toxic algae. Therefore, various approaches to devise multiple strategies are required. Contents of the invention [0003] Algae blooms have become a worldwide environmental problem. Recently, algicidal bacteria have attracted much attention as possible agents for inhibiting algal blooms in water bodies. [0004] Provides fermentation products derived from Beauveria bassiana, Brevibacillus brevis, Streptomyces spororaveus, Paenibacillus elgii or Streptomyces sp. Isolated compounds and compositions having algicida...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N63/02A01N25/12A01N25/14A01N25/02A01N25/04A01N25/06A01N25/18C09D5/16A01N63/20A01N63/25A01N63/28A01N63/30
CPCC09D5/1687A01N63/22A01N63/25A01N63/28A01N63/30A01N63/20A01N63/23A01N63/27A01N63/38A01N63/34C12N1/205
Inventor 约翰·马林安娜·露西娅·科尔多瓦-科雷洛斯帕梅拉·马罗内
Owner MARRONE BIO INNOVATIONS
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