THE BEHAVIOR OF SOME VARIETES OF PEAR AT THE MELLIFEROUS FLEA (PSYLLA PIRI) ATTACK. PUBLISHEDSNEJANA DAMIANOV email@example.com
The work license follows the behavior in culture of some varietes of pear, the research being carried out at Farm 3 Lugoj – The Didactic Experimental Base of Timişoara In the research was analized the behavior at the attack from the melliferus flea (Psylla piri L.) as an often pest in every year producing attacks on the sprouts in special and on the leaf. The experience includes a number of nine variants with seven trees on a variant, from wich 3 trees were analized. The observations regarding the behavior of varietes of pear at the attack from the flea honez were carried out in the years 2011 – 2012 at the maximum pest attack. The effect caused by the pest on vegetative growth determined by measurements was also followed. The obtained results are presented in tabels regarding the frequency of the attack, the level of the attack from the pest (Psylla piri L.) and also the vigor of the trees after the trunk sectional area in cm2, the average length of growing sprouts for a number of nine varietes from each variant. Following observations were noted :poor attacked by flea honey of the pear were the varietes: Dean of winter, Ina Estival, Euras; middle attacked: Virgiliu Hibernal, Milenium; strong attacked: Williams, Countess of Paris, Napoca, Cure. The best vigor of growing after the trunk area and the average length of sprouts growing was obtained at the winter Dean of winter and the Ina Estival variety. Very significant results in terms of average length of growing sprouts were obtained at the Milenium and Napoca variety.
melliferus flea, pear, varietes, treatments
Biology applied in Agriculture