Abstract
1. Analysis of drought damage was made examing (a) damage by injurious insects and diseases and (b) drought damage from physiological and morphological relations. 2. As for physiological and morphological drought damage, varietal differences were observed by detecting the decreasing percentage of height of plant, number of stems and weight of panicles compared to control. In that result fairly high negative correlation was recognized between the decreasing percentage of number of stems and that of weight of panicles. When the percentage of crop yield decrease was compared, heavy panicle varieties of early on middle ripe type has shown less percentage than tillering late ripe one. 3. Among injurious insects Sesamia inferens WALKER keeps comparatively greater part. When varietal differences of insect damage were compared by injured panicle weight percentage for control/injured stem number percentage, it was recognized that the result came together with that of heretofore. 4. As for disease damage, that of the blast disease (Piricularia 0ryzae BRI. et CAV.) at spike-pedicel was found to keep almost all part. When compared by the method mentioned above the result of varietal differences came near that generally recognized. 5. Fairly high negative correlation seems to exist between outbreak of the blast disease at spike-pedicel by drought and degree of the development of the silicificated-short-cells in the epidermal tissue at spike-pedicel. 6. In test of drought resistance it is necessary to make analytical examination discriminating physiological and morphological resistance against that to diseases and injurious insects.
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Claims 9
Claim · model-written summary
Rice varieties differed in drought-related decreases in height, stem number and panicle weight.
Verbatim
t0“paddy rice plants”
e0“varietal differences were observed by detecting the decreasing percentage of height of plant, number of stems and weight of panicles compared to control.”
Claim · model-written summary
Decreases in stem number and panicle weight were negatively correlated.
Verbatim
t0“paddy rice plants”
e0“fairly high negative correlation was recognized between the decreasing percentage of number of stems and that of weight of panicles.”
Claim · model-written summary
Heavy-panicle early or middle types lost less crop yield than late tillering types.
Verbatim
t0“paddy rice plants”
e0“heavy panicle varieties of early on middle ripe type has shown less percentage than tillering late ripe one.”
Claim · model-written summary
Sesamia inferens accounted for a comparatively greater part of insect damage.
- Taxon
- paddy rice plantst0
- Interactor
- Sesamia inferens WALKER
Sesamia inferense0pest - Outcome
- comparatively greater parte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“paddy rice plants”
e0“Among injurious insects Sesamia inferens WALKER keeps comparatively greater part.”
Claim · model-written summary
Insect injury showed varietal differences consistent with prior results.
Verbatim
t0“paddy rice plants”
e0“When varietal differences of insect damage were compared by injured panicle weight percentage for control/injured stem number percentage, it was recognized that the result came together with that of heretofore.”
Claim · model-written summary
Spike-pedicel blast accounted for almost all disease damage.
Verbatim
t0“paddy rice plants”
e0“that of the blast disease (Piricularia 0ryzae BRI. et CAV.) at spike-pedicel was found to keep almost all part.”
Claim · model-written summary
Varietal blast differences resembled generally recognized patterns.
Verbatim
t0“paddy rice plants”
e0“When compared by the method mentioned above the result of varietal differences came near that generally recognized.”
Claim · model-written summary
Drought-associated blast outbreak was negatively correlated with silicified short-cell development.
Verbatim
t0“paddy rice plants”
e0“Fairly high negative correlation seems to exist between outbreak of the blast disease at spike-pedicel by drought and degree of the development of the silicificated-short-cells in the epidermal tissue at spike-pedicel.”
Claim · model-written summary
Authors recommend separating physiological and morphological drought resistance from disease and insect resistance in tests.
Verbatim
t0“paddy rice plants”
e0“In test of drought resistance it is necessary to make analytical examination discriminating physiological and morphological resistance against that to diseases and injurious insects.”