Abstract
We investigated the effects of changes in the density of rice skipper Parnara guttata guttata Bremer et Grey larvae in paddy fields on the damage caused during the cultivation of forage rice for whole-crop silage. Young instar larvae were released in mesh cages on late-transplanted rice plants. The larvae were reared in the cages until the pupal stage. After removal of the insects, rice plants at the yellow ripening stage were harvested and dried, and the number of panicles and dry weight of panicles and straw were measured. The total digestible nutrients content of the rice plants was also estimated. Dry matter weight decreased with increasing larval density on the rice plants, whereas total digestible nutrients content did not decrease significantly. Thus, P. guttata guttata may cause quantitative damage to forage rice, but the qualitative damage it causes is relatively small.
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Claims 3
Claim · model-written summary
Forage rice dry matter weight decreased as rice skipper larval density increased.
- Taxon
- rice
Oryza sativae0 - Interactor
- rice skipper Parnara guttata guttata Bremer et Grey
Parnara guttatae1pest - Outcome
- Dry matter weighte0
- Direction
- decreasede0
- Qualifier
- increasing larval densitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dry matter weight decreased with increasing larval density on the rice plants”
e1“rice skipper Parnara guttata guttata Bremer et Grey larvae”
Claim · model-written summary
Forage rice total digestible nutrient content did not decrease significantly with increasing skipper density.
- Taxon
- riceOryza sativae1
- Interactor
- rice skipper Parnara guttata guttata Bremer et GreyParnara guttatae2pest
- Outcome
- total digestible nutrients contente0
- Direction
- did not decreasee0
- Qualifier
- increasing larval densitye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total digestible nutrients content did not decrease significantly”
e1“increasing larval density on the rice plants”
e2“rice skipper Parnara guttata guttata Bremer et Grey larvae”
Claim · model-written summary
The authors conclude that rice skipper may cause quantitative damage to forage rice.
- Taxon
- forage ricee0
- Interactor
- P. guttata guttataParnara guttatae0pest
- Outcome
- quantitative damagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. guttata guttata may cause quantitative damage to forage rice”