Naturalis acts by contact, with the direct insect pathogenic action described below. ‘Like other insect pathogens, Beauveria bassiana infects host insects mainly by infecting their shell. B. bassiana conidia adhere to the insect shell through a hydrophobic interaction between the spore wall and the lipids of the shell. A hydrophobic type of protein and certain enzymes help in the adhesion process. Conidia germination and subsequent successful infection depend on a number of factors, e.g. sensitivity and stage of development of the host and certain environmental factors, such as optimal temperature and humidity. Prior to penetration, the tubules can form textures and infectious eczema. The process of penetration takes place by mechanical means and by the production of various enzymes including proteinases, chitinases and lipases which degrade the insect shell. After penetration, the fungus invades the host’s body, which is accompanied by various actions of the host’s immune system. During the infection process, Beauveria bassiana produces proteolytic enzymes and toxins, while the host insect reacts with cellular and lymphatic secretions. Inside the body of the insect, the fungus multiplies and produces blastospores, or yeast cells, which are passively distributed in the hemolymph. The enzymes begin to destroy the internal structures of the insect host causing morbidity within 36 to 72 hours. Reduced diet and immobility are quickly apparent, and the insect dies within 4 to 10 days of infection. The time to death depends on the insect species, age and conidial dose. After the death of the insect, the fungus begins its saprophytic growth: the blastospores are transformed into mycelia, which emerge through the shell. Airborne conidia form on the surface of the killed insect, developing the characteristic white mold. Spore production takes place only in conditions of high humidity. The activity of Naturalis against Diptera: Tephritidae (cherry fly, Mediterranean fly and dako) includes two different modes of action: 1) by contact against the perfect insects as previously described. 2) Insect repellent action against females: Recently the efficacy of the biological insecticide Naturalis based on Beauveria bassiana strain ATCC 74040 against the Mediterranean fly Ceratitis capitata (Wiedemann) (Diptera: Tephritidae) has been evaluated in laboratory experiments and ., 2009). Under laboratory conditions, the biological insecticide effectively protected the fruit from Mediterranean fly owls when evenly coated with Naturalis spray. In selected laboratory bioassays, the females of the Mediterranean fly laid 5 and 3 times more eggs, respectively, in unsprayed fruit and in fruit sprayed with inert auxiliaries of the biological insecticide, compared to the fruit sprayed with the biological insecticide itself. In addition, females did not discriminate to ovulate in either unsprayed fruit or auxiliary sprayed fruit, suggesting that inactive auxiliaries did not have an insect repellent effect on C. capitata females. The perfect insects landed indiscriminately on both unsprayed fruit and fruit sprayed with organic insecticide, and Mediterranean flies did not appear to be repelled by chemical compounds or fungal structures of B. bassiana. However, in unselected laboratory tests, significantly more fruit bites were observed in unsprayed fruit than in fruit sprayed with the organic insecticide, suggesting that females of the Mediterranean fly preferred unsprayed fruit to ovulate over fruit product. . Tag: NATURALIS is a bio-insecticide containing live spores of the fungus Beauveria bassiana strain ATCC 74040. This strain is naturally occurring and is not genetically modified to control various species of insects and mites that infest fruits and vegetables. . It acts mainly as an interaction and also has a slowing effect on the ovulation of the diphtheria that infects the fruit. The conidia of the fungus Beauveria bassiana strain ATCC 74040 attach to the housing of insects and mites, germinate and penetrate, spreading the fungus into the host. The death of insects is due to the mechanical spread of the mycelium, resulting in the loss of water and nutrients by the insect, in combination with the secretion of hydrolysis enzymes. NATURALIS fights perfect insects and especially the early stages (eggs and larvae) of mealybugs, thrips, blackflies, diphtheria, pear fleas, iron worms and certain species of aphids,which infect fruits, vegetables and ornamental plants in greenhouses and in the countryside.
Oily Concentrated Suspension (OD)
Thanks to its formula (min. 2.3 x 107 conidia / ml of Beauveria bassiana, strain ATCC 74040) its competitive action in other fungi is enhanced.
Marketing Authorization Number: 14531 / 27-07-2015
Packaging: Bottle 1L
The information contained in this form is for informational purposes only and does not in any way replace the instructions for use given on the approval and on the label of the preparation.
The plant protection products must comply with the instructions for use and precaution indicated on the label. For more and validated information, visit the e-mail address of the ministry: http://wwww.minagric.gr
