Effect of weed management strategies on weed count and yield attributes of apple (Malus × Domestica) under high density orchard system

Abstract

A field experiment was conducted during 2018 to assess the effect of different weed management strategies on weed count and yield attributes of apple under high density orchard system. The said investigation was carried out in experimental fields of Division of Fruit Science, SKUAST, Kashmir. One year old trees of exotic apple cv. "Elstar" grafted on M-9 T337 rootstock, introduced from Holland in March 2017, were selected for experimentation. Thirteen selected treatments were laid in randomized complete block design, with each treatment replicated thrice. The results revealed that the use of the combination of pre and post emergent herbicide was significantly effective in controlling weeds. Minimum weed count (0.25) was found under T12 (Oxyfluorfen followed by Glufosinate ammonium). Maximum incidence of weeds was recorded under unweeded control. Furthermore significant influence of different weed management strategies was observed on initial and final fruit set in high density apple trees. Maximum final fruit retention was obtained under paddy straw mulch. The highest fruit yield per tree was recorded under T12 (Oxyfluorfen followed by Glufosinate ammonium) which was statistically at par with T5 (paddy straw mulch). Minimum final fruit retention, fruit yield and yield efficiency was recorded under control indicating that weed management strategies are very much essential under high density orchard system for obtaining higher yield.

Effect of Plant Growth Regulators for Improvement of the Quality and Shelf Life of Kinnow (Citrus nobilis x Citrus deliciosa): A Review

“…The yield may be explained by the two growth regulators' beneficial effects on the translocation and biosynthesis of carbohydrates, which were reflected in rising fruit numbers and average fruit weight. Results are consistent However, their findings demonstrated that the use of GA 3 and NAA increased yield/tree, fruit weight [34][35][36][37][38]. The higher fruit set from improved flowering and higher hermaphrodite flowers, as well as the altered source-sink relationship in the plant, which directly reallocates the carbohydrate reserves by suppressing the vegetative growth, were the causes of the yield increase in paclobutrazol-treated trees before the bud break, during vegetative growth, paclobutrazol application will not only prevent the increased growth but also increase the yield.…”

“…The impact of the growth regulator treatments on the apple's shelf life under 30 days of ambient storage was significant. [35] No Name of crop Treatment Results References 7.53% was found to be the maximum physiological weight loss (CPLW). Growth regulators reduced the amount of malic acid relative to untreated fruits while increasing TSS, or total sugars, in the fruit.…”