02646naa a2200337 a 450000100080000000500110000800800410001902200140006002400380007410000160011224501000012826000090022850000470023752015980028465300120188265300230189465300170191765300290193465300300196365300100199365300180200365300100202170000200203170000140205170000220206570000220208770000200210970000200212970000250214977301340217410616572021-01-08       2020    bl uuuu     u00u1 u    #d  a1835-27077 a10.21475/ajcs.20.14.09.p26832DOI1 aSPAGNOL, D.  aHand-held mechanical device improves thinning efficiency of peach trees.h[electronic resource]  c2020  aCorresponing author: mateus.pasa@gmail.com  aAbstract The objective of this study was to evaluate the effect of mechanical-manual thinning at different developmental stages in the thinning efficiency and productive performance of ?Sensação? peach trees. The experiment was performed during the 2013 and 2014 growing seasons, in a commercial orchard located in Morro Redondo (RS), Brazil. Plant material consisted of 7-year-old peach trees grafted on Capdeboscq rootstock and trained as an open-vase system. The experiment was arranged as a randomized block design, with five three-trees replications. In order to reduce the effect of personal experience, the treatments and measurements were applied by the same person in a set of replications throughout the experiment. Treatments consisted of: control I [without thinning (WT)]; control II [hand thinning (HT) 40 days after full bloom (40 DAFB)]; MmT at full bloom (FB): 50% of open flowers; MmT at the end of bloom (EB): 80-100% of open flowers; MmT at petal fall (PF); and MmT at the green fruit (GF) stage (fruit with ~1 cm of diameter). The MmT was performed using a hand-held portable device. The parameters assessed were: percentage of thinning, fruit set, thinning time, work economy, production per tree, fruit mass, estimated yield and fruit size distribution. The use of the MmT at the stages tested reduces thinning time of ?Sensação? peach trees, resulting in labor saving, as well as increases the percentage of fruit in category (CAT) 1. The MmT when performed at GF results in a higher percentage of thinning. The treatment MmT at FB increases the average fruit mass.  aDURAZNO  aFOLLOW-UP THINNING  aLABOR SAVING  aMECHANICAL-MANUAL DEVICE  aPRUNUS PERSICA (L.BATSCH)  aRALEO  aTHINNING TIME  aYIELD1 aGIOVANAZ, M. A.1 aCARRA, B.1 aABREU, E. SOZO DE1 aFACHINELLO, J. C.1 aMALGARIM, M. B.1 aMELO-FARIAS, P.1 aPASA, M. DA SILVEIRA  tAustralian Journal of Crop Science, December, 2020, volume 14 (9), Pages 1519-1524.Open Access. Doi: 10.21475/ajcs.20.14.09.p2683