The same d, groups of 15 second instar nymphs were transferred to rice panicles
(milky stage) using a small brush.
Across all five genotypes, there was a quadratic decrease in the percentage of tagged panicle
spikelet sterility when temperatures increased from 9 to 20[degrees]C, demonstrating that the smallest sterility percentages were obtained at the higher temperatures assessed in the experiment (Figure 2).
It is usually due to discoloration of grain, whole panicle
, distinct lesions, panicle
blight, brown/black spots on grain, discoloration of florets and a number of viral/bacterial/fungal agents that are responsible for developing the disease (LSU Agricultural Center, 1987; Groth et al.
Table 2: Length and area of the grains and panicle
Moreover, Ur1 caused undesirable decrease in kernel weight and spikelet fertility and abnormal panicle
morphology, (36) which prompted them to drop their breeding trial.
225 m) in comparison to the other row spacings, allows an increase in the number of tillers and, as a result, the number of panicles
per area and grain yield.
Studied traits included the number of panicle
weight, seed yield, biological yield, harvest index, thousand seed weight.
Crop and soil parameters: The crop parameters determined were number of tillers and panicles
plant-1, plant height, panicle
height, fresh and dry weight of straw with and without grain, weight of panicle
, grains panicle
-1, empty grains panicle
-1, weight of grain from each pot, weight of 1000 grains, chlorophyll content of leaf (measured with a SPAD meter), and B concentration in plant straw and grain.
The agronomic assessments were performed when the plants presented the grains in the panicles
with milky/farinaceous stage, by means of the measures: plant height; fresh matter yield (ton.
75 First Iron ITSI Score base on toxicity the standard score evaluation system for rice developed by IRR (1996) at 40 days transplanting Second Iron ITS2 Score base on toxicity score the standard evaluation system for rice developed by IRR (1996) at 60 days after transplanting Panicle
per PAM Panicles
meter square counted on five hills/plot AFRGM Score AGRS Galls were counted on ten hills on each plot.
From the samples collected in October two fractions were separated: leaf blades and stems with leaf sheaths (the panicles
were ragged by the wind in October).
All plants were harvested after many of panicles