They are smaller than a human thumb but have a gigantic appetite. These are the caterpillars of the species Helicoverpa armigera. This insect has plagued crop fields from Africa to Asia for years but had never appeared in the Americas. “Then, in 2012, the first reports started coming in of a new species of caterpillar in the soy fields of Bahia in northeastern Brazil,” remembers Joaquim Mariano Costa, a coordinator of the COAMO Cooperative. The following year, the Brazilian Agriculture and Livestock Research Company (EMBRAPA) confirmed the intrusion, and since then, the tiny caterpillar has already caused billions in damages to Brazilian fields – and it also poses a threat to cotton and and corn crops. “This development has made integrated pest management increasingly necessary in our fields,” says Costa, who coordinates annual field days for COAMO members that also feature training to identify and combat caterpillars. Now, he and his colleagues are also receiving solutions through the Bayer Contra Lagartas (Bayer against Caterpillars)-Project.
Coping with Caterpillars
Monitoring for a Successful Harvest
Among the actions carried out in the project is the use of moth monitoring traps. They are designed to measure infestation levels and help provide evidence of an upcoming population explosion. “Since the presence of adults in the area is highly related to the levels of eggs, we can make pretty good assumptions of the expected impact on the crop,” explains Everson Zin, a Fungicide Product Marketing Strategy Manager at Bayer in Brazil. The traps, made of plastic or wood, are triangular in shape and also have an adhesive liner used to capture moths. Also, each trap can be baited with a pheromone that is specific to different species of caterpillars that have already caused problems in the past. This facilitates the identification of each captured individual and eases the choice of the correct crop protection product needed to control it.
Integrated pest management increasingly necessary in our fields
According to Zin, there are now 5,200 traps spread throughout the country, with 1,300 monitoring points. The focus is on areas where there is higher caterpillar pressure, such as the states of Rio Grande do Sul, Paraná, Minas Gerais, Mato Grosso do Sul, Mato Grosso, Goiás, and Bahia. The manager says that in addition to Helicoverpa, the incidence of other caterpillar species has also been increasing in recent months. “The main objective of our actions is to create a data network that helps producers interact when making their crop protection decisions,” he says. In addition to managing their crops correctly, Bayer Contra Lagartas aims to help optimize farmers’ productivity by maximizing the efficiency of inputs and promoting good agricultural practices.
Exchange of information
The traps enable a great exchange of information between company technicians and the farmers,” summarizes Zin. To participate in the project and receive traps, farmers can register on the website at bayercontralagartas.com.br, and post information about their plantation on a weekly basis. “Our next goal is to build local and state reports on caterpillar control all over Brazil,” he says.
Our next goal is to build local and state reports on caterpillar control all over Brazil.
At first try, without a doubt
The right timing for fungicide application makes all the difference when it comes to the management of diseases in soybean crops. To achieve this perfect timing, Bayer do Brazil has initiated another project called ‘De Primeira, Sem Dúvida’ or ‘At first try, without a doubt’. The project will monitor fields in real time by means of plantation cameras placed in the five major soy regions in Brazil. Renowned researchers in plant pathology will directly monitor these video feeds and give direct feedback to the farmers. Every soybean area will be divided into two equal plots and while one of them will get the proper fungicide treatment to manage diseases like soybean rust, the other plot will serve as a control, where the application will be delayed. An additional component of the program is an algorithm that can predict the risk level of infestation. These combined monitoring efforts allow Bayer to help farmers identify the ideal moment for fungicide applications.