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Effect of infestation with the lesser (purple-Lined) Sugar-cane stem borer Chilo agamemnon Bles. (Lepidoptera: Pyralidae) on Sugar quality and Sugar yield [electronic resource].

By:

El-Sherif, S. I

Contributor(s):

Mahmoud, H. H

Language: English Summary language: Arabic Description: p.313-317Other title:

تأثير الإصابة بدودة القصب الصغيرة Chilo agamemnon Bles. (عائلة pyralidae ورتبة حرشفية الأجنحة) على جودة ومحصول السكر.‪ [Added title page title]

Uniform titles:

Bulletin of Faculty of Agriculture. Cairo University, 2008 v. 59 (4) [electronic resource].

Subject(s):

Online resources:

Full Text Article

In: The bulletin. Faculty of Agriculture. Cairo University 2008.v.59(2)Summary: The relationship hetween three infestation parameters or cane stalks representing the different sugar-cane plantations applied to milling fadories in Middle and Upper Egypt on one hand and the standard sugar quality and sugar yield parameters applied in these factories were investigated. Infestation parameters were: infested stalks (IS%) percentage, infested joints (IJ%) percentage and holes/stalk (H/S) mean number. Sugar quality and sugar yield parameters correlated with these infestation parameters were: juice Brix, juice purity, Pol.% and sugar yield. According to plantation, IS% ranged 73-89% with a mean of 78%, IJ% varied from 10% to 18%, with a mean of 15% and H/S ranged 3.35- 5.39 with a mean of 4.36. On the average, C.agamemnon infestation decreased juice Brix, purity and Pol% by 4.42%, 2.29% and 6.14%, respectively. Infestation decreased sugar yield hy 4.16- 12.79% with a mean of 8.2%. Sugar quality and yield parameters were negatively correlated to infestation parameters but none of them was significantly related to %IS while IJ% was significanlly related to juice Brix, polarity and sugar yield %. HI/S was significanlly related to juice Brix and Pol% but insignificantly related to juice purity and % sugar yield. Thus IJ% seemed to be a reliable and acceptable parameter for determining the effect of C. agamemnon infestation on sugar quality and sugar yield. The simple regression values refer that a unit increase in IJ% decreases the sugar yield% by 0.04%.

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The relationship hetween three infestation parameters or cane stalks representing the different sugar-cane plantations applied to milling fadories in Middle and Upper Egypt on one hand and the standard sugar quality and sugar yield parameters applied in these factories were investigated. Infestation parameters were: infested stalks (IS%) percentage, infested joints (IJ%) percentage and holes/stalk (H/S) mean number. Sugar quality and sugar yield parameters correlated with these infestation parameters were: juice Brix, juice purity, Pol.% and sugar yield. According to plantation, IS% ranged 73-89% with a mean of 78%, IJ% varied from 10% to 18%, with a mean of 15% and H/S ranged 3.35- 5.39 with a mean of 4.36. On the average, C.agamemnon infestation decreased juice Brix, purity and Pol% by 4.42%, 2.29% and 6.14%, respectively. Infestation decreased sugar yield hy 4.16- 12.79% with a mean of 8.2%. Sugar quality and yield parameters were negatively correlated to infestation parameters but none of them was significantly related to %IS while IJ% was significanlly related to juice Brix, polarity and sugar yield %. HI/S was significanlly related to juice Brix and Pol% but insignificantly related to juice purity and % sugar yield. Thus IJ% seemed to be a reliable and acceptable parameter for determining the effect of C. agamemnon infestation on sugar quality and sugar yield. The simple regression values refer that a unit increase in IJ% decreases the sugar yield% by 0.04%.

Summary in arabic.

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