Shapes of mandibles of white stemborer Scirpophaga innotata (Walker, 1863)larvae associated with different rice varieties
نویسندگان
چکیده
منابع مشابه
Describing Shapes of Mandible in Selected Populations of the Rice Striped Stem Borers (Chilo suppressalis, Walker, 1863) Associated with Different Rice Types
The striped stemborer (SSB), Chilo suppressalis Walker, 1863 is a widely distributed pest of the rice agroecosystem. It bores and feeds inside the stalks of the rice plant during larval stage using its strong mandibles. Host-plant resistance has played a very important role in the management of this pest however; many cultivated types have succumbed to infestation even those with hard stems. Si...
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in order to evaluation of rice stem borer's damage (chilo suppressalis walker), on rice cultivars an experiment was carried out by two factors, (three cultivars and five spraying times), in completed randomized block design an factorial sampling was conducted on the hills infested to deadhearts (d.h), whiteheads (w.h) and yield loss. five hills were randomly selected from each plot and...
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Understanding the physiological processes associated with high yield traits in modern cropvarieties is essential to further increase grain yield and improve nutrient management strategies.Field trials were conducted to study the effects of fertilization and variety on the grain yield ofrice (Oryza sativa L.) with two fertilizer levels and 18 modern varieties. The objectives were toevaluate yiel...
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Crop genotypes play a dominant role in crop production systems. They affect crop productivity by their higher yield potentials, resistance against insect pest and diseases under different climatic conditions. To evaluate different varieties of rice for their growth and yield characteristics, an experiment was conducted during 2012. Four varieties including IR28, NERICA-4, Koshihikari and Nippon...
متن کاملinfestation of rice varieties to the egg masses of chilo suppressalis walker (lepidoptera: pyralidae) in rice nurseries of mazandaran
abstract striped rice stem borer, chilo suppressalis walker (lepidoptera: pyralidae) is one of the important pests in rice fields of mazandaran. therefore, almost the farmers of northern iran apply several pesticides in nurseries for the pest control; while it is causes environmental risks and damages to human. in this research two different items including, 1- study of egg masses density in nu...
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ژورنال
عنوان ژورنال: Egyptian Academic Journal of Biological Sciences. A, Entomology
سال: 2012
ISSN: 2090-0813
DOI: 10.21608/eajbsa.2012.14906