Cotton growers of Bangladesh usually cultivate eleven varieties of cotton and abruptly use chemical insecticides for controlling pests. In this study we evaluated the performances of three extensively cultivated varieties (CB9, CB10 and SR05) under economic threshold level (ETL) based insecticide sprayed and non-sprayed conditions. Results showed that number of bolls per plant and yield of the varieties differ significantly and there was found significant difference between the experimental conditions. Our study showed that the variety SR05 produced significantly higher number of bolls (40.5±6.6 /plant) and yield (2498.3±18.9 kg/ha) compared to CB9 and CB10, whereas CB9 produced higher number of seed (36.9±3.7/boll) and seed index (83.4±0.9 g/100 seed) under ETL based insecticide sprayed condition. The ginning out tern (GOT%) and seed germination percentage of the studied varieties did not differ to a significant level. Overall fitness of the varieties indicated that SR05 possesses comparatively better performances for commercial production of cotton in Bangladesh.
Morphometric characteristics of cotton armyworm Spodoptera litura were studied on cotton varieties CB9, CB10 and SR05. The morphometric parameters of the insect showed that the cotton variety SR05 revealed significantly the highest diameter of egg mass (7.4±0.4 mm). The cotton varieties showed significant effect on the length of different larval instars but the breadth of 3 rd and 4 th instar were statistically different. The studied cotton varieties as food sources did not affect pupal length and also the length and breadth of adults, but pupal breadth showed significant variation. The highest breadth (6.5±0.6 mm) of pupa was found when the insects were reared on SR05 variety.
An ectopic tooth is one that is erupting in an aberrant route, whereas an impacted tooth is one that has failed to fully erupt into the oral cavity within its expected developmental time period and can no longer be expected to do so. The majority of canine eruption abnormalities occur in one of two directions: palatal or buccal displacement from the usual eruptive location 2. Permanent maxillary canine impaction or ectopic eruption affects about 1-2 percent of the general population. Canines that are palatally displaced are twice as common as those that are buccally placed. Buccally displaced canines, on the other hand, are very prevalent in practice and their etiology is related to a deficient dental arch perimeter 3,4. So, the purpose of this report is to show a case of a 15-year-old male with ectopic maxillary canines who was treated by extracting the four first premolars, using segmental T loops for retraction of ectopic canines. The goals were met at the end of treatment with optimal aesthetic balance and excellent occlusal connections, resulting in great long-term stability.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.