We always glance at the microbial products beauveria bassiana, metarhizium anisopliae on the website, They are being used as a biological insecticide to control a number of pests such as termites, thrips, whiteflies, aphids, and different beetles.
Recently, the grasshopper attracts more and more attention to biocontrol products especially beauveria bassiana & metarhizium anisopliae.
Beauveria bassiana products are a kind of entomogenous fungus of the Ascomycetes. It usually sires by asexual, which makes Reproduction-conidia( beauveria bassiana spores). The distribution of beauveria bassiana is very wide. It has been found in the mountains from a few meters to more than 2,000 meters above sea level. It can invade 6 species, 15 families, 200 species of insects, bed bugs and mites.
One beauveria bassiana’s mode of action is producing Beauverin (Non-ribosomal Polypeptide Toxoid), Oomycin (Benzoquinone Toxoid), and Calcium Oxalate Crystals, which can cause insect poisoning, disrupt metabolism and kill them.
Another beauveria bassiana’s mode of action is that spores can penetrate the body wall of the insect, multiplies in the insect body, absorbs nutrition and moisture in the insect body, and then kills the target pest by destroying the structure of pest. The affected pests will turn to white all the body.
Metarhizium anisopliae is a broad-spectrum insect pathogen that can be parasitic to a variety of pests. It enters the body of the pest through its surface or feeding and continuously multiplies in the body of the pest. It consumes nutrients, mechanically penetrates, and produces toxins, and continues to spread among the pest population, killing the pest. The morphology of metarhizium anisopliae fungus is close to penicillin. The colonies are fluffy or cotton-flocked, initially white, and green when spores are produced. Parasitic to more than 200 pests such as Lepidoptera, Orthoptera, Coleoptera, Homoptera, etc.
The conidia of metarhizium anisopliae are easily attached to the internodes of the host insect’s skin. When encountering suitable temperature and humidity, the conidia germinate, produce bud tubes, and form hyphae. Mycelia secrete enzymes capable of dissolving chitin, dissolving insect body walls. And by virtue of the pressure of bacteria on host invasion, hyphae invade the host’s epidermis, and then gradually inwardly invade, invading the adipose tissue and muscle of insects.
The mycelium multiplies in the insect body, causing the insect to die. When host insects are first sensed by metarhizium anisopliae, yellow-brown spots can be seen on the body wall. Due to the action of metarhizium toxin, insects begin to show neurological disorders. Larvae stop feeding, their response to stimuli decreases, and they eventually die. After death, the corpse became rigid, and the hyphae inside the worm began to extend to the outside. The corpse was soon covered with a layer of white hyphae. Then one or two days later, conidial stalks and conidia formed on the hypha. It turns green or dark green.
The beauveria bassiana secretes many toxins to interfere with the pests’ physiology, while the metarhizium anisopliae produces the metarhizium toxin to break the body wall of pests.
The temperature of beauveria bassiana can be 24-28℃, while metarhizium anisopliae can be 24-26 ℃.
The beauveria bassiana y metarhizium anisopliae has the potential to promote green sustainable development in agriculture. Creating agriculture value for over 18 years, Dora has pushed the boundary of agriculture and nature. Protect nature and green agriculture.