Susai aspru
Sonchus asper
Buruiana seminifera anuala, cu o puternica radacina pivotanta, producatoare de latex. Prefera soluri proaspete care sa nu fie sarace in calcar, soluri fertile lutoase si luto-nisipoase.
Epoca de germinare: Primavara dar si vara. Adancimea de germinare pana la 2 cm.
Cotiledoane: De forma spatulata sau oval-alungita, rosietice, cu petiol scurt.
Frunzele adevarate: Prima frunza adevarata numai dantelata (dintata), a doua cu perisori pe dinti, frunze bleu-verzi, lucioase, frunzele superioare sesile infasurand la baza tija, in spirala, toate fiind dentat – paroase.
Tulpina: Groasa, goala in interior, glabra, adesea ramificata de la baza, cu o inaltime de pana la 80 cm.
Floarea: Capitule convexe, galben – tern (sters, spalacit), in inflorescente dense cu putine flori; capitulele si pedunculii fara peri glandulosi.
Perioada de inflorire: Inceputul verii – toamna.
Numarul de seminte pe planta: 4700 (1000-6000)
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Produse de protecție a plantelor
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