Tag Archives: Pirecris

Mosquito verde en viña

Green leafhopper in vineyard: how to deal with this pest

Mosquito verde en viña

The detection of green leafhopper pests in vineyard has put wine growers on alert at a key moment of the grape season, just a few weeks after harvesting time begins. Several official bodies have warned of the substantial increase of mobile forms of green leafhopper in vineyard, as high population scenarios have appeared in which it is foreseeable to exceed the treatment thresholds.

In Spain, the Department of Plant Protection of the Generalitat Valenciana (Valencia) has issued warnings to producers in the central area of the province. The same occurs with the Network of Alert and Phytosanitary Information of the Junta de Andalucía  as several spots have been detected in the province of Malaga. In Toledo, ASAJA  has also confirmed the presence of this pest in vineyards in the district of Méntrida and La Torre de Esteban Hambrán. In these areas, caution is even greater after the devastating plague that farmers suffered last crop.

Green leafhopper in vineyard results in an insect between 2 and 3 mm in length. It is placed on the underside of leaves and is used to fly at the slightest movement. Green leafhopper attacks the nerves of leaves, as it feeds on the plant sap. Its effect is extremely detrimental because it stops the vegetative development and, consequently, the fruit ripening. Visually, the most evident consequence is the marginal desiccation of leaves, which turn yellow.

The most intense presence of green leafhopper in vineyard usually occurs during summer because of high temperatures, warm and dry weather conditions. Economic losses for growers can be significant because the effects can be extended in the post-attack season, with a possible decrease in sprout vigor and crop yield.

Treatments for green leafhopper in vineyard

The scenario caused by the proliferation of green leafhopper in vineyard (Empoasca vitis Goethe) in Spain has also occurred in Europe, as a substantial increase in the population of cicadellidae has been observed in recent years. Seipasa has produced Pirecris®, a natural biopesticide showing an excellent performance in the control of several species of cicadellidae in vineyard.

The active ingredient of Pirecris® guarantees its efficacy and knock-down effect. In addition, the formulation of a high technology product has allowed Seipasa to obtain the product, guaranteeing a ‘green’ profile based on a plant matrix that enhances the action.

Pirecris® efficacy against the green leafhopper has been tested through more than 18 field trials conducted in several countries. One of them is the one carried out in the south of France during the summer of 2014. For this trial, a complete randomized block with 4 repetitions and 5 treatments was unfolded: an untreated control, Pirecris at 3 different doses (1; 1.5 and 2l / ha) and a reference chemical pyrethroid (0.125 l / ha). Two applications (A and B) were performed: the first one, on July 2014 and the second 7 days later. The number of larvae in 50 inner leaves was evaluated at 3 and 7 days after each application.

As shown in figure 1, the first application of Pirecris® significantly reduced E.vitis populations. These populations were lower than the ones in the control treatment for all doses tested.

Mosquito verde en viña

Figure 1.- Evolution of the number of E.vitis larvae found in 50 leaves. A: first application; B: second application. Samples made at 0, 3 and 7 days after each application.

Green leafhopper populations remained low in all treatments with Pirecris during subsequent samplings, especially after the second application. The results are similar to those obtained by the reference treatment. The efficacies obtained in this trial were high (about 90%), especially with the medium and high doses (1.5 and 2 l / ha), surpassing those obtained by the reference pyrethroid (see figure 2).

Mosquito verde en viña

Figure 2.- Evaluation of the Abbott efficacy of Pirecris and the reference pyrethroids against E.vitis in vineyard corresponding to samples taken at 0, 3 and 7 days after each application.

The results prove that Pirecris® is a solid and efficient alternative for the treatment of the green leafhopper in the vineyard. This solution, 100% natural and free of chemical residues, is fully aligned with the needs of producers and consumers towards a rational, sustainable and environmentally friendly agriculture.

Fruit Attraction 2016: New natural insecticides of SEIPASA, on the media

 

New natural insecticides of SEIPASA, on the media

 

Various media have echoed the great success obtained by the new natural insecticides of SEIPASA, Nakar and Pirecris, that were presented in the framework of Fruit Attraction 2016 and that will be a great relief for the farmer.

Why? Because producers are increasingly seeking more effective tools to finish with the pests without creating resistance and without leaving residues in crops, which results in greater acceptance and value in international markets; SEIPASA is the solution.

Here are some of the online media that have excelled in their pages the good reception of the new natural products of SEIPASA:

http://www.hortoinfo.es/index.php/noticia/7326-seip-f-att-071016
http://www.lasprovincias.es/ribera-costera/201610/08/seipasa-presenta-madrid-novedosos-20161008004727-v.html
http://heconomia.es/volatil.asp?o=-1628923942&c=agro
http://www.foodnewslatam.com/6188-las-nuevas-armas-naturales-contra-las-plagas-seipasa-fruit-attraction.html
http://www.interempresas.net/Horticola/Articulos/162938-Seipasa-presento-sus-nuevas-‘armas’-naturales-contra-las-plagas.html
http://www.phytoma.com/noticias/empresas/9951-las-nuevas-armas-naturales-de-seipasa-contra-las-plagas-la-revelacion-de-fruit-attraction-2016
http://www.fhalmeria.com/detallenoticia.aspx?id=t%2BpVvn%2FWMOgL6X%2FWeKTiXg%3D%3D
http://www.infoagro.com/noticias/2016/insecticidas_naturales_de_seipasa__revelacion_en_fruit_attraction.asp
http://www.inocuidadlatam.com/index.php/3480-las-nuevas-%E2%80%98armas%E2%80%99-naturales-contra-las-plagas.html
http://www.ifema.es/Institucional_01/noticias/INS_P_554797

Whitefly: Tecnova trial unveils Nakar’s potential

The new Seipasa natural formulation to control whitefly equals the chemical reference’s effectiveness, plus it does not leave any residue and it is suitable for integrated and organic production

María del Mar Téllez, IFAPA researcher, at the conference on whitefly.

María del Mar Téllez, IFAPA researcher, at the conference on whitefly.

At Tecnova’s headquarter, in Almería’s Technology Park, its researchers presented the results of a test conducted on integrated control of whitefly in greenhouse tomatoes developed in an experimental farm that belongs to the research entity. Next to María del Mar Téllez, researcher at the Institute of Research and Formation on Agriculture and Fisheries of the Government of Andalusia (IFAPA), technicians and producers introduced the most effective tools to deal with this insect, Bemisia tabaci, through preventive measures as well as plant health and biological control.

As explained by Tecnova’s R&D Director, Carolina Martínez, and integrated production technician Carolina Sánchez, this research has proven the high effectiveness of treatments that employ SEIPASA’s biopesticides on whitefly immature and adult populations.

NAKAR, Zero Residues and no safety term

NAKAR (registry # ES-00123) is a bioinsecticide taken as a reference, which show its great capacity to eradicate whitefly populations while shutting of its biological reproduction.

During the trial developed from March to June, we evaluated the insecticidal effectiveness in three experimental treatments compared to an untreated control: control (T0), NAKAR 10 ml/l (T1), NAKAR 6 ml/l + Pirecris 2 ml/l (T2) and Acetamiprid 0.5 g/l (T3).

The Tecnova researchers highlighted the successful process of whitefly pest control with natural products such as Nakar and Pirecris, as well as chemical reference Acetamiprid. The findings of the trial showed that “in all three treatments the insecticidal effect was similar and statistically indistinguishable from each other”, which confirms the effectiveness of Seipasa’s natural formulations equals the chemical reference, with added value too – it doesn’t leave behind residues in the crop and that makes it suitable for integrated and organic production.

Evolución de la severidad - Adultos Bemisia tabaci

Thus, the insecticide potential of the newly formulated NAKAR that was stated in this trial adds up to the advantage of being a zero residue product, which does not require safety periods. Similarly, its synergy with Pirecris, another botanical-based bioinsecticide, has proven a tight control of Bemisia tabaci.

As the conclusions stated in, both solutions cause direct and immediate effects on pests: “They have produced desiccation in immature stages and a loss of cohesiveness in the adult stage. In both cases, direct contact of these products has led to the death of insects”.

Fases inmaduras de la mosca blanca antes y despúes de los tratamientos, y efectos de los tratamientos sobre la fase adulta

In this line, Seipasa’s technical director, Xavier Nácher, emphasized the accomplished goal of this new solution hitting the market: “NAKAR achieves the eradication of the pest penetrating the insect’s cell membranes and causing its dehydration, by disruption of the waxy layer, and death”.

Xavier Nácher, Seipasa’s Technical Department Director.

Xavier Nácher, Seipasa’s Technical Department Director.

As Nácher stated, NAKAR’s action causes cytolysis of the insect cells, in other words, the breakdown or decomposition of the membrane, so it loses cell material and vital processes stop. Furthermore, it blocks the insect’s spiracles, which leads to its suffocation.

The NAKAR’s natural base makes it a privileged tool for Integrated Pest Management (IPM) strategies, as well as resistance management programs, to which it shows optimum results.


NAKAR use strategies

As Nácher explained, NAKAR can be used as a solution against whitefly in crops:

1) Intended for zero residues production, it must be applied as soon as the pest appears in order to shorten its life cycle and consequently its spread. Similarly, it can be used in the crop’s final stage to guarantee residues free harvests.

2) In order to set Integrated Pest Management (IPM) strategies and resistance management, NAKAR can be used with other insecticides that do have a security term in the middle period of the cycle.

3) Similarly, its effective insecticidal action, substantiated by recent trials, make it an alternative for the most demanding organic production.