Vol. 11, Issue 6 (2022)

Author(s):
Navjeet Kaur, Rupinder Singh and Ashish Ughareja

Abstract:
Kinnow is considered as an important citrus fruit crop. Kinnow is the prime fruit of Punjab. Most of the growers like this fruit to frown in their orchards due to its high consumer demand, wider adaptability and good economics return, but fruit drop become a major disease of Kinnow. It causes excessive loss to its yield and economy of Kinnow growers. Fruit drop may be occurring naturally, but sometimes its due to various infections like pathological, Entomological and physiological infection. These infections cause low fruit retention and reduction in fruit quality and yield of Kinnow. Preharvest fruit drop mainly occur during July and continue till harvest (Dec-Jan.). At this stage fruit drawn the nourishment from the tree and reach at maturity and the most detrimental fruit drop occur in September and October. The main attributes which cause preharvest fruit drop are Colletotrichum gloeosporioides. The fungi built up on twigs and fruit stalk and cause die back and heavy fruit drops in Kinnow. So, in this case some application of fungicides minimizes the pathogenic infection, hormonal balance and efficient utilization of nutrients. Fungicide like curzate shows excellent result to control fruit drop. likewise, 2,4-D reduce the pathogenic attack, increase fruit retention and also improve fruit size, fruit weight, TSS, Juice percentage, Acidity and Vitamin C. Therefore, the main objective of this review is effects of different fungicides with the combination of 2,4-D on preharvest fruit drop and quality improvement in Kinnow.