Showing 2 results for Seed Kernel
Gh. A. Akbari, H. Jabbari, J. Daneshian, I. Alahdadi, N. Shahbazian,
Volume 12, Issue 45 (10-2008)
Abstract
In order to investigate the limited irrigation impact on physical characteristics of seed in nine sunflower hybrids, three 3-replicate field experiments RCBC were conducted under three irrigation regimes (irrigation after 60, 120 and 180 mm cumulative evaporation from class A evaporation pan, respectively) at the research field of Seed and Plant Improvement Institute in Karaj, Iran. The results showed that the Maximum length, width and seed diameter were obtained from irrigation after 60 mm cumulative evaporation from pan, and irrigations after 120 and 180 mm evaporation caused to decrease the length by 11% and 16%, width by 21% and 26% and seed diameter by 22% and 28%, respectively. There fore the seed diameter in comparison with width and seed length was most susceptible to limited irrigations levels. The Maximum length was seen in hybrid of A74×R95, and the maximum width, and seed diameter were observed in hybrids of Allstar. Also, A74×R95 under irrigations after 60 and 120 mm evaporation and Azargol under irrigation after 180 mm evaporation had the highest seed weight.
P Heravi, Kh Talebi Jahromi, Gh Sabahi, A Bandani,
Volume 13, Issue 47 (4-2009)
Abstract
Various effects of methanolic extract of neem seed kernel on larvae of cotton boll worm, Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae) were studied and compared with those of Neem Azal T/S and Neem Plus, two commercial formulations. The pest was collected from Gorgan (Golestan Province, Iran) and reared on a bean based artificial diet. The neem seed was collected from Bandar-Abbas (Hormozgan Province) and extracted in laboratory. Growth inhibitory and antifeedant assays were carried out on larvae treated with seed kernel extracts in 3 concentrations,1, 2.5 and 5%, under choice and no-choice conditions. The neem extract had a significant antifeedancy effects on larvae. Neem Plus and 5% extract had the least and most antifeedancy effects, respectively. The most and least feeding rates belonged to Neem Plus and Neem Azal treatments, respectively, which differed significantly (P<0.05). Feeding deterrence index (FDI) was highest in 5% extract which also differed significantly from Neem Plus treatment. Larvae treated with extract led to malformation and prevented formation of pupa and ultimately caused death. The LT50 values with confidence limit (CL) of 95% were 3.84 and 4.13 d, for Neem Azal and 5% extract respectively. DC50 and EC50 of extract were 4.73% and 2.73% at similar CL, respectively.
