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MORPHOLOGICAL AND BIOCHEMICAL VARIATIONS OF TEAK (Tectona grandis L.) CLONES IN RELATION TO RESISTANCE AGAINST LEAF DEFOLIATOR (Hyblaea puera CRAMER) AND SKELETONIZER (Eutectona machaeralis WALKER)

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Title MORPHOLOGICAL AND BIOCHEMICAL VARIATIONS OF TEAK (Tectona grandis L.) CLONES IN RELATION TO RESISTANCE AGAINST LEAF DEFOLIATOR (Hyblaea puera CRAMER) AND SKELETONIZER (Eutectona machaeralis WALKER)
 
Creator PRAJAPATI, VIJAYKUMAR M.
 
Contributor KUKADIA, M.U.
 
Subject dna, physical control, vegetables, biological development, bats, sets, climatic factors
 
Description The present investigation on “Morphological and
biochemical variations of teak (Tectona grandis L.) clones in
relation to resistance against leaf defoliator (Hyblaea puera
Cramer) and skeletonizer (Eutectona machaeralis Walker)” was
carried out under field condition at two locations viz; Clonal
Teak Seed Orchard of Waghai and Rajpipla in Dangs and
Narmada District respectively, whereas laboratory studies on
biochemical and nutritional aspects were conducted in the
laboratories of Biotechnology and Agricultural Chemistry of
ASPEE College of Horticulture and Forestry, Navsari Agricultural
University, Navsari, Gujarat during 2008 and 2009.The
experiment comprised of 18 teak clones viz., TCR-1 to TCR-18
and TCW-1 to TCW-18 from Rajpipla and Waghai, respectively
each replicated four times. Morphological observations were
analyzed using Randomized Block Design (RBD) during 2008 and
2009. Observations based on biochemical and nutritional
attributes were recorded in four replications in Completely
Randomized Design (CRD) during the year 2009. Correlation and
regression of insect orientated leaf damage as well as their
larval population with all the characters were studied.
The fixed plot survey of clonal screening revealed
lowest leaf damage of teak defoliator at Rajpipla in clone TCR-2
(15.75 %), while it was highest in TCR-12 (74.87). Lowest larval
population was noticed in TCR-3 (1.39) which remained highest
in TCR-12 (12.13). At Waghai, maximum leaf damage (15.85 %)
of defoliator was observed in TCW-8, whereas it was minimum
(2.00) in TCW-10. Percent leaf damage by leaf skeletonizer at
Rajpipla was minimum (14.38) in TCR-3 and maximum (75.03) in
TCR-12. Minimum larval population (1.64) was observed in TCR3,
while it was maximum (13.17) in TCR-12. Minimum per cent
leaf damage (16.74) by leaf skeletonizer at Wagahi was
observed in TCR-8 while it remained maximum in TCW-1 (72.93).
Minimum larval population (2.15) was observed in TCW-10 and
maximum in TCW-1 (13.17).
On morphological basis, significantly maximum tree
height, stem girth (DBH), number of branches, leaf area,
petiole length, tree spread, number of inflorescence, number of
seeds, seed length, seed width, test weight of seed and seed
yield were observed in clone TCR-2 at Rajpipla and TCW-10 at
Waghai during the period of investigation. Leaf weight (fresh
and dry) was observed significantly higher in TCR-12 from
Rajpipla and TCW-1 from Waghai.
Amongst biochemical and nutritional attributes,
water content, chlorophyll (a and b), protein and nitrogen were
observed significantly higher in TCR-12 at Rajpipla and TCW-1 at
Wagahi. Polyphenol, carbohydrates, potassium, phosphorus,
calcium and magnesium were observed in high proportion in
TCR-2 and TCW-10 of Rajpipla and Waghai teak seed orchards,
respectively.
Correlation of teak defoliator and skeletonizer
induced leaf damage as well as larval population exhibited
significantly positive correlation with leaf weight (fresh and
dry) implying increase in damage with corresponding increase of
these factors and vice-versa while it was negative with leaf area,
petiole length, seed (length, width, test weight and yield)
indicating increase in damage and larval population with unit
decrease in values of these characters, during both the years as
well as in pooled results at both the locations. The remaining
characters viz; tree height, DBH, number of branches, tree
spread, number of inflorescence and number of seed failed to
influence the damage as well as population, significantly.
Leaf damage and larval population of teak defoliator
and skeletonizer with biochemical attributes of teak clones had
significant and positive relationship with water content,
chlorophyll (a and b), while it was significant but negative with
polyphenol and protein. In case of nutritional attributes
nitrogen exhibited significant and positive correlation, whereas
in the same clones, level of potassium, phosphorus, calcium and
magnesium were higher proving significant negative correlation.
Thus, role of morphological characters and
biochemical/nutritional characters has been significantly proved
in teak clones vis-a-vis teak defoliator as well as skeletonizer,
thereby confirming non-preference and antibiosis type of host
plant resistance, respectively.
 
Date 2016-04-25T10:01:21Z
2016-04-25T10:01:21Z
2011-08
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/65562
 
Language en
 
Format application/pdf
 
Publisher Navsari Agricultural University, Navsari