The rice stem borer, Chilo suppressalis (Walker) (Lepidoptera: Pyralidae), is one of the most detrimental pests affecting rice crops. The use of Bacillus thuringiensis (Bt) toxins has been explored as a means to control this pest, but the potential for C. suppressalis to develop resistance to Bt toxins makes this approach problematic. Few C. suppressalis gene sequences are known, which makes in...

The Mexican rice borer, Eoreuma loftini (Dyar), is an invasive pest of rice, Oryza sativa L., in the Gulf Coast region of the United States. This pest also damages sugarcane, Saccharum spp. hybrids; corn, Zea mays L.; and sorghum, Sorghum bicolor (L.) Moench, and feeds on weedy noncrop grasses. Multiple aspects of integrated pest management including use of pheromone traps, manipulation of plan...

Tolerant rice accessions were identified from a field study involving 196 at Pandit Jawaharlal of Agriculture and Research Institute, Karaikal for yellow stem borer, Scirpophaga incertulas. in along with the susceptible check (TN1) considered analyzing biochemical parameters viz., chlorophyll content, total sugars, reducing phenols, soluble protein, proline. Higher amounts moderate lesser sugar...

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...

Rice striped stem borer is a cosmopolitan pest that widely distributed in different regions of northen Iran and spraying with diazinon is the most common procedure to control this pest. We evaluated comparative physiological effects of diazinon spraying on the three populations of Chilo suppresalis collected from Gourabzarmikh (Go), Sheikhmahale (Sh) and Rasht (Ra) in Iran. The determination of...

Natural variability in susceptibility of field collected rice yellow stem borer (Scirpophaga incertulas) and rice leaffolder (Cnaphalocrocis medinalis) to Bacillus thuringiensis (Bt) δ-endotoxins was investigated to establish a geographic baseline for comparison of future population responses to the increased use of Bt based insect control products like Bt transgenic rice and commercial formula...

Overwintering larvae of the rice stem borer, Chilo suppressalis accumulate glycerol and are freezing tolerant to about -25 degrees C. However, non-diapausing larvae cannot accumulate glycerol and are killed by freezing. We compared the extent of tissue damage, the effects of glycerol concentration, and the transport of glycerol and water in fat body tissues from these larvae at selected freezin...