Studies on the Effect of Lac Cultivation on Yield of Pigeonpea (Cajanus cajan Linn.)

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Date
2020
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MPUT, UDAIPUR
Abstract
The present investigation on “Studies on the effect of lac cultivation on yield of pigeonpea, (Cajanus cajan Linn.)” was conducted on Rangeeni strain of lac insect in Baisakhi season at lac insect gene bank cum garden situated at Department of Entomology, Rajasthan College of Agriculture, MPUAT, Udaipur during 2019-20. The study revealed that the mean initial and final density of settlement on lower, middle and upper portion of plant in three set of experiments were 83.70, 80.10, 62.60; 82.90, 79.10, 67.50; 71.50, 72.10, 69.00 and 77.10, 73.40, 56.80; 75.60, 71.30, 59.80; 66.20, 65.70, 62.00 crawlers per sq.cm, respectively. The mean initial mortality and per cent settlement of crawlers on lower, middle and upper portion of plant in three set of experiments were 7.89, 8.36, 9.27; 8.81, 9.86, 11.41; 7.41, 8.88, 10.14 and 92.15, 91.48, 90.06; 90.91, 89.98, 88.32; 92.28, 90.78, 89.12 per cent, respectively. The duration of sex differentiation on lower, middle and upper portion of plants in three set of experiments were 49.20, 48.80, 48.70; 48.90, 48.80, 47.90 and 49.20, 48.90, 48.10 days, respectively. The mean density of female cells at maturity recorded at lower, middle and upper portion of plant were 4.30, 5.30, 4.40; 4.10, 5.60, 4.00 and 4.40, 4.00, 5.30 female cells per sq.cm in three set of experiment respectively. The study on effect of lac cultivation on yield attributing traits reveled that mean seed yield in lac inoculated experiment and control experiment were 603.33 and 895.00 kg/ha, respectively. The per cent decrease in plant height, number of branches per plant, number of pods per branch, number of seeds per pod, seed yield per ha and weight of 100 seeds in lac inoculated pigeonpea were 6.60, 3.08, 4.35, 3.60, 32.59 and 12.26%, respectively. The Benefit Cost Ratio was also higher (1.95) in lac inoculated experiment then the sole seed crop (control) of pigeonpea (1.84).
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Studies on the Effect of Lac Cultivation on Yield of pigeonpea
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Regar N.L. And Lekha
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