| Description: |
Depending on especies here are differents plumages:
- Rhopalosiphum padi, green grey plumage;
- Sitobium Avenae, green red plumage.
The damges display with yellowing and virosis. These damages consist in the substraction of lymph, and in the production of honeydew. |
| Biology: |
These aphids show some differences of biologic behaviours.
- Rhopalosiphum padi is a dioecious especies, has like primary host plants of genre Prunus. The attack to Graminacee begons in winter.
- Sutobium avenae: it is the most diffused; it is a monoic especies and develops its cycle on the Graminacee both spontaneous and cultivated. |
| Damage: |
The chimic interventions are justified only for overcoming of intervection thresholds. (9 aphids per ears or 80% of infested culms at the end of their glowening). The products to be used, for overcoming of thresholds are:
- Primicarb;
- Alfametrina;
- Deltametrina;
- Acefate;
- Dimetoato;
- Permetrina. |
| Active principles: |
|
-Treatment Epoch: May |
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% |
Dose
(gr/L) |
Biologico |
| PIRIMICARB |
17,5% |
200 |
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Photos: 2 |
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