abstract striped rice stem borer, chilo suppressalis walker (lepidoptera: pyralidae) is a major pest of rice in northern iran. regarding to the importance of population dynamics studies in pest management programs, the population fluctuations of c. suppressalis was studied in central part of mazandaran province (rice research centre of mazandaran) during 2005-2006. the male and female moths wer...

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...

The striped stem borer, Chilo suppressalis (Walker), is an important insect pest of rice which shows substantial variation in developmental duration among individuals. This variation is currently poorly characterized but it is important from a control perspective because pesticides can only target early sensitive instars. It is unclear whether there are key stages that determine the length of d...

In insects, rapid degradation of odorants in antennae is extremely important for the sensitivity of olfactory receptor neurons. Odorant degradation in insect antennae is mediated by multiple enzymes, especially the carboxylesterases (CXEs) and glutathione S-transferases (GSTs). The Asiatic rice borer, Chilo suppressalis, is an economically important lepidopteran pest which causes great economic...

The bacterium Bacillus thuringiensis (Bt) produces a wide range of toxins that are effective against a number of insect pests. Identifying the mechanisms responsible for resistance to Bt toxin will improve both our ability to control important insect pests and our understanding of bacterial toxicology. In this study, we investigated the role of MAPK pathways in resistance against Cry1Ca toxin i...

چکیده بر اساس مطالعات انجام شده در فصول زراعی 1386 و 1387، بعضی از جنبه های زیستی کرم ساقه خوار برنج (chilo suppressalis walker) شامل تعداد سنین لاروی و طول دوره ی رشد و نمو مراحل مختلف زیستی در دو نسل در منطقه ی مازندران بررسی شد. نتایج پژوهش حاضر نشان داد که تعداد سنین لاروی کرم ساقه خوار برنج در نسل های اول و دوم متفاوت می باشد، به طوری که این حشره در نسل اول دارای 6 و در نسل دوم دارای 5 سن ...

Quantitative real-time polymerase chain reaction (qPCR) is an efficient and widely used technique to monitor gene expression. Housekeeping genes (HKGs) are often empirically selected as the reference genes for data normalization. However, the suitability of HKGs used as the reference genes has been seldom validated. Here, six HKGs were chosen (actin A3, actin A1, GAPDH, G3PDH, E2F, rp49) in fou...

Abstract Juvenile hormone (JH) is a major endocrine that mediates development, metamorphosis, and reproduction in insects. It binds directly to its methoprene-tolerant receptor recruits heterodimer partner form the JH–receptor complex then activates JH-inducible gene known as Krüppel homolog 1 (Kr-h1). There evidence this downstream factor mediating both physiological biochemical processes; how...