Effects of Pinching on Growth, Yield, and Quality of Watermelon (Citrullus lanatus) Varieties in Chitwan, Nepal

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An investigation was accomplished at the production farm of Nepal Agrovine Private Limited, Bharatpur-5, Chitwan, from February 2021 to May 2021. Two factorial randomized complete block designs with twelve treatment combinations and three replications were used to set up the experiment. Factor A comprised three watermelon hybrids (Augusta, Sugar Queen, and Super Queen), and factor B comprised four pinching levels treatment (no pinching, fourth node pinching, sixth node pinching, and tenth node pinching). Pinching combinations were placed in each replication. Augusta had the longest main vine and the most nodes, while Sugar Queen had the longest leaves. The number of branches, the number of leaves per vine, and the internodal distance were not significantly affected by variety. Super Queen had the most female flowers, but Sugar Queen had the highest yield characteristics, such as average fruit weight, yield, and the number of fruits collected per vine. Fruit quality parameters like rind thickness were highest in Augusta, while fruit length, pulp percentage, and total soluble solids were reported to be highest in Sugar Queen. The sixth node pinching level recorded the maximum length of the main vine, number of branches per vine, number of nodes on the main vine, and leaf length, while the fourth node pinching level reported the maximum number of leaves per vine. Days to first, 50% and 100% flowering were lowest in no pinching. In sixth-node pinching, the maximum amount of female flowers, lowest sex ratio, and minimum number of male flowers were recorded. In a similar vein, the yield, average fruit weight, and number of fruits gathered per vine were reported to be the highest in sixth-node pinching. Significantly greater leaf width was reported in Sugar Queen x sixth node pinching, maximum main vine's node count was reported in Augusta x fourth node pinching, greater internodal distance in Augusta x no pinching, Sugar Queen x no pinching, and Super Queen x no pinching. Similarly, the amount and quantity of fruits obtained from each vine were reported to be maximum in Sugar Queen x 10th node pinching. In contrast, the average fruit weight was reported to be maximum in Augusta x sixth node pinching. Thus, it can concluded that the Sugar Queen variety of watermelon can be grown in Chitwan conditions during the late winter to spring season by pinching it at the 10th node for better yield. By implementing the pinching technique at the 10th node, farmers can potentially achieve higher yields, improving overall productivity and profitability.