What does this research mean for the field?

Foliar application of 1.0% potassium sulphate significantly improves fruit setting, retention, yield, and physiochemical characteristics while reducing fruit drop in guava cv. L-49. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

The aim is to evaluate how plant growth regulators and nutrients affect guava yield and fruit quality.

June 7, 2026Open Access

Impact of plant growth regulators and nutrients on guava (Psidium guajava) yield in south- eastern Rajasthan

Key Points

The aim is to evaluate how plant growth regulators and nutrients affect guava yield and fruit quality.
Conducted at Horticulture Research Farm, Career Point University, Kota during 2023-24.
Foliar application of potassium sulphate (1.0%) at fruit setting and development stages.
Assessment of fruit drop, setting, weight, size, and physiochemical attributes.
Potassium sulphate reduced fruit drop by 39.77% and improved fruit setting by 71.05%.
Increased average fruit weight to 142.43g and improved TSS to 11.70%.
Enhanced vitamin C content to 174.10mg and raised total sugars to 7.25%.

Abstract

AbstractThe experiment was conducted at Horticulture Research Farm, Career Point University, Kota, during 2023-24 to examine the influence of plant growth regulators and nutrients on fruit setting and physiochemical attributes of guava (Psidium guajava L.) cv. L-49. The plants received first dose of PGRs and nutrients at fruit setting and second at fruit development stage. Foliar application of potassium sulphate (1.0 %) significantly reduced fruit drop (39.77%), while improved fruit setting (71.05%) and fruit retention (60.23%). The foliar application of potassium sulphate (1.0%) increased fruit weight (142.43g), fruit length (8.71cm), fruit width (7.89cm), fruit volume (132.77cc), TSS (11.70%), TSS: acid ratio (30.00), vitamin C (174.10), pectin (1.83 %), reducing sugar (3.80%), non-reducing sugar (3.45%) and total sugars (7.25%) and minimum acidity (0.39%). The foliar application of potassium sulphate (1.0%) also improved the fruiting and physiochemical characteristics of guava cv. L-49 as compared to the control.

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