Are Nonwoven Synthetic Pollination Bags a Better Choice for Sorghum Breeding? | Chapter 09 | Current Research in Agriculture and Horticulture Vol. 1
This work investigated the effects of
seven pollination bag treatments on three varieties of sorghum for: grain loss
to birds; total weight of five panicles (g); total grain weight of five
panicles (g); average grain weight per panicle (g); germination per cent; and
occurrence of grain mold during 2016. Varieties were: 1167048 hybrid (brown
seeded); BR007B (red seeded); and P9401 (white seeded). The bag treatments
were: 1. No bagging; 2. Kraft paper; 3. Kraft paper + plastic bag screen; 4
Used duraweb® SG1; 5. Used duraweb® SG2; 6. New duraweb® SG1; 7. New duraweld®
SG2. High bird pressure resulted in 100% seed loss on uncovered panicles and
75% under Kraft paper pollination bags. Birds preferred white seeded P9401,
which led to no seed recovery under Kraft paper bags. There was virtually no
bird damage with all other pollination bags. For panicle and grain yields the
varieties performed in the order 1167048>BR007B>P9401. Unprotected
panicles and paper bag treatments had the lowest yields. Panicles covered with
the new synthetic bags exhibited 195 to 652% higher yields compared to Kraft
paper bags. Varieties x bag type interactions were not important as they
contributed 4 to 6% to the total sum of squares for yield traits. Germination
test under normal and stress conditions showed no significant adverse effect of
bag treatments on seed health. Reused bags performed as well as new bags for
all of these traits. Varieties differed significantly for the occurrence of
five grain mold pathogens, with highest occurrence of Alternaria, up to 40%, on
1167048 hybrid. Of the five pathogens, bag types differed significantly for
Phoma with the highest occurrence of 9% on re-used duraweb®SG2 bags. Thus bags
require disinfecting and cleaning before re-use. It is concluded that nonwoven
synthetic bags are a better choice than the Kraft paper pollination bags for
increasing the grain yield and virtually eliminating the bird damage in
sorghum.
Author(s) Details
Dr. R. E. Schaffert
Embrapa Maize and Sorghum,
Sete Lagoas, Rodovia MG 424 KM 45, CEP:35.702-098, Sete Lagoas-MG, Brazil.
Prof (Rtd) D. S. Virk
School of Natural Sciences,
Bangor University, Bangor, Gwynedd, Wales LL57 2UW, UK.
H. Senior
PBS International, Salter
Road, Scarborough, YO11 3UP, UK.
View Book: http://bp.bookpi.org/index.php/bpi/catalog/book/124
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