Canopy-attention-YOLOv4-based immature/mature apple fruit detection on dense-foliage tree architectures for early crop load estimation

2022 ◽  
Vol 193 ◽  
pp. 106696
Author(s):  
Shenglian Lu ◽  
Wenkang Chen ◽  
Xin Zhang ◽  
Manoj Karkee
Keyword(s):  
Apple Fruit ◽  
Load Estimation ◽  
Crop Load ◽  
Early Crop ◽  
Mature Apple

scholarly journals Apple Fruit Removal and Limb Girdling Affect Fruit and Leaf Characteristics

1994 ◽  
Vol 119 (2) ◽  
pp. 157-162 ◽  
Author(s):  
Ido Schechter ◽  
J.T.A. Proctor ◽  
D.C. Elfving
Keyword(s):  
Feedback Inhibition ◽  
Dry Weight ◽  
Stomatal Resistance ◽  
Apple Fruit ◽  
Sink Strength ◽  
Fruit Removal ◽  
Cross Sectional ◽  
Crop Load ◽  
Dry Matter Concentration ◽  
Mature Apple

Mature apple trees (Malus domestica Borkh.) were studied in 1989 and 1990 to explore the effect of crop load on fruit dry weight (DW), dry-matter concentration (DMC), specific leaf area (SLA), and leaf C exchange, using girdled (G) and nongirdled (NG) limbs. Fruit DW and DMC decreased with heavier fruit loads. Fruit on G limbs had higher fruit DW and DMC than on NG limbs. SLA on NG limbs was unaffected by crop load, but increased dramatically on G limbs with a crop load of less than one fruit per square centimeter limb cross-sectional area. These leaves also had a low photosynthetic rate, high stomatal resistance, and high internal CO2 concentration. The results do not support the concept of feedback inhibition of photosynthesis and demonstrate specific circumstances in which the capacity of sinks to use assimilates was saturated. Exceeding this limit by significantly reducing sink strength resulted in excessive carbohydrate accumulation in leaves. Nutrient levels in leaves on G, nonfruiting limbs were generally lower than for the other treatments.

Infection frequency of mature apple fruit with Erwinia amylovora deposited on pedicels and its survival in the fruit stored at low temperature

2005 ◽  
Vol 71 (4) ◽  
pp. 296-301 ◽  
Author(s):  
Takanori Tsukamoto ◽  
Koji Azegami ◽  
Takayuki Matsuura ◽  
Tatsuji Ohara ◽  
Yasuhiro Inoue ◽  
...  
Keyword(s):  
Low Temperature ◽  
Erwinia Amylovora ◽  
Apple Fruit ◽  
Infection Frequency ◽  
Mature Apple

scholarly journals Survival ofErwinia amylovorain mature apple fruit calyces through the viable but nonculturable (VBNC) state

2009 ◽  
Vol 107 (1) ◽  
pp. 106-116 ◽  
Author(s):  
M. Ordax ◽  
E.G. Biosca ◽  
S.C. Wimalajeewa ◽  
M.M. López ◽  
E. Marco-Noales
Keyword(s):  
Apple Fruit ◽  
Vbnc State ◽  
Viable But Nonculturable ◽  
Mature Apple

The effect of irrigation and crop load on stem water potential and apple fruit size

1997 ◽  
Vol 72 (5) ◽  
pp. 765-771 ◽  
Author(s):  
A. Naor ◽  
I. Klein ◽  
I. Doron ◽  
Y. Gal ◽  
Z. Ben-David ◽  
...  
Keyword(s):  
Water Potential ◽  
Fruit Size ◽  
Apple Fruit ◽  
Stem Water Potential ◽  
Crop Load ◽  
Stem Water

scholarly journals Growth Response of Apple Fruit to NAA and Accel: Effect of Intraspur Competition and Position on a Spur

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 765D-765
Author(s):  
Brent L. Black ◽  
Martin J. Bukovac ◽  
Matej Stopar
Keyword(s):  
Growth Response ◽  
Fruit Size ◽  
Apple Fruit ◽  
Fruit Growth ◽  
Crop Load ◽  
Commercial Thinning ◽  
Whole Tree ◽  
Fruit Diameter

Apple fruit size is influenced by position on the spur, and location and number of competing fruits. King fruit appear to have the greatest potential to size and grow best in the absence of intraspur fruit competition (ISFC). Accel (A) and NAA (N), commercial thinning chemicals, influence fruit size beyond their effects on crop load. A 2-year study was conducted to determine the effect of ISFC and position (king, K, or lateral, L) on fruit growth in response to A and N. Branches from `Redchief Delicious' were thinned, after petal fall, to one K, one L, one K + one L, or two L fruits per spur. Whole-tree treatments of N (15 mg·liter–1), A (50 mg·liter–1, 1993; 25 mg·liter–1), and a combination (N+A) were applied at 10-mm king fruit diameter. A nontreated control was included. In 1993, N and N+A reduced fruit size only with ISFC, while A increased fruit size in the absence of ISFC. In 1994, A had no effect, but N and N+A reduced fruit growth with ISFC. In both seasons, A and N decreased the frequency of spurs bearing multiple fruit, while N+A dramatically increased number of spurs with multiple fruits (branch survey).

scholarly journals Responses of apple fruit size to tree water status and crop load

2008 ◽  
Vol 28 (8) ◽  
pp. 1255-1261 ◽  
Author(s):  
A. Naor ◽  
S. Naschitz ◽  
M. Peres ◽  
Y. Gal
Keyword(s):  
Water Status ◽  
Fruit Size ◽  
Apple Fruit ◽  
Crop Load

Invasion and colonization of mature apple fruit by Erwinia amylovora tagged with bioluminescence genes

2004 ◽  
Vol 70 (6) ◽  
pp. 336-341 ◽  
Author(s):  
Koji Azegami ◽  
Takanori Tsukamoto ◽  
Takayuki Matsuura ◽  
Tatsuji Ohara ◽  
Yasuhiro Inoue ◽  
...  
Keyword(s):  
Erwinia Amylovora ◽  
Apple Fruit ◽  
Mature Apple
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