Chemical Identification
Common Name
Beauveria bassiana
中文通用名
球孢白僵菌
Category
Activity
Beauveria bassiana (Balsamo) Vuillemin strain 147 is a contact insecticide active against lepidopteran insects, in particular Ostrinia nubilalis. Water is required to initiate the infection process which is the same as other B bassiana-based insecticides. Infection takes 24-48 hours following contact with the insect, death occurs within 3-5 days due to the effects of mycotoxins. NPP recommends that the product should be applied to foliage when maximum egg-laying is observed.
Beauveria bassiana JW-1 is a contact insecticide active on all life stages of Coleoptera, Heteroptera and Lepidoptera. Following contact, the conidia secrete enzymes that dissolve the insect cuticle, allowing the fungus to establish itself within the body of the insect. Feeding and reproduction cease almost immediately. Infected insects die as a result of water- and nutrient-loss. Ovicidal activity is thought to be exerted in a similar way. The product has no plant-systemic or translaminar activity. It has residual activity lasting up to a week. Horizontal transfer means that the product continues to control insects after the initial application.B bassiana JW-1 is safe to beneficial insects.
In field trials, no phytotoxicity was observed and efficacy has been equal to commercial standards.
B bassiana strain 447 is a contact insecticide. The spores germinate on the outside of the insect, forming a germ tube which penetrates the insect's body, allowing the fungus to establish itself within the body of the insect. Following the insect's death, the fungus grows on the exterior of the insect, producing spores which can then infect other insects.The fungus is neither toxic nor infective towards mammals.
Field trials performed in by the University of Florida demonstrated that a population of fire ants was reduced by up to 80%, and the number of ant mounds reduced by 50% using B bassiana strain 447.

The effect of B bassiana strain 447 on the termite Cornitermes cumulans was investigated in Brazil in 1991 - 1992. Formulations were prepared with rice substrate on which the fungus had been grown and/or harvested conidia, and applied to termite nests 0.3 to 1.6 m high; the effect was observed after 100 days. Treatments using 6 g of formulation containing 2 g of conidia added to rice medium gave the best result. 12 g of formulation without conidia or 1 g of conidia added to the rice medium were found to give a high rate of mortality. 3 g of conidia without rice only affected 2 out of 4 nests tested. 
The product infects target insects by ingestion and cuticle penetration. It was found to have a highly specific activity, with host specific fungal isolates not affecting other insects, plants and animals.

Field efficacy tests conducted by Terra Nostra in collaboration with the Research and Development Institute for the Agri-Environment (IRDA) in Quebec and Atlantic AgriTech Inc showed the efficacy of the bio-pesticide to be equal to that of chemical insecticide products. The study was carried out on small and large larvae populations under different weather conditions: small and large larvae densities in test plots were reduced 85-91% and 88% respectively over a 9-day period of treatment. Key areas for improvement of the product's consistency and performance were identified by testing the product under adverse conditions. In the same study, one of the two highly pathogenic B bassiana strains (95% efficacy) used was selected for further application procedures; the strain was found to induce a 15% higher pest mortality rate and to be an indigenous strain isolated by Terra Nostra.

A research partnership has been established via Terra Nostra's Canadian subsidiary, Corporation CCIP, with the Armand-Frappier Institute, part of the Institut National de la Recherche Scientifique (INRS), to test the B bassiana product in field trials and compare its activity to that of chemical insecticides in 2003-2004.

A further set of trials was carried out in 2004 in collaboration with McCain Foods Ltd, the world's largest processor of potatoes and fries in the world, at McCain's experimental farm in New Brunswick, Canada. The product will be tested for use on small Colorado potato beetle larvae and, in a separate test, for the control of adult and egg development stages. Test will include assessing the efficacy of the product on hibernating adults and eggs and un-hatched eggs in infested crops and different doses of the bio-pesticide will be tested alongside chemical insecticide controls such as Admire (imidacloprid).
Imperial College, London and the University of Edinburgh have studied the effects of impregnating surfaces with spores of various fungal species to control mosquitoes as vectors of malaria. Mosquitoes carrying malaria parasites were kept in boxes that had been sprayed with spores of B bassiana in an oil-based formulation. Only 6 h of exposure were needed, and the preparation was effective for at least 12 days after application. Mosquito control after two weeks was 90% and of the survivors, only 0.4% carried malaria sporozoites (Science, 308, 1638, 1641).
CropUse
Crop uses:
Maize, soybeans, cotton, tobacco, egetables, ornamentals.

Maize: 25 kg/ha (formulated product)

Cotton: 0.75 litre/ha (formulated product)

Tomatoes: 0.11 kg/ha (formulated product)

 

Premix

Type

AI concn

Microgranule (MG)

5 x 188 spores/g

Flowable

 

Bait

10%

 

 

Toxicology
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Environmental Profile

Mallard duck

non-toxic, non-pathogenic

Bobwhite quail

non-toxic, non-pathogenic


B bassiana JW-1 is non-toxic and non-pathogenic to bees, fish and aquatic arthropods.


Viral activity does not persist for longer than one year. Fate in aquatic systems:
Non-persistant.

Fate in soil:
B bassiana does not accumulate in soils following repeated applications. 
Fate in soil:

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