A brief description is given of Perkinsiella saccharicida Kirk. as a pest of sugarcane. Population fluctuations, varietal susceptibility, ovipositional habits, natural control, alternate host plants, alary polymorphism, light attraction and the effect on leafhoppers of trash burning are discussed.

We construct a finite algebra generating a variety with 2EXPTIME complete membership problem. This proves that the universal membership problem for varieties and the varietal equivalence problem are 2EXPTIME complete as well, answering the question of Bergman and Slutzki from 2000.

Visual discrimination between barley varieties is difficult, and it requires training and experience. The development of automatic methods based on computer vision could have positive implications for the food processing industry. In the brewing industry, varietal uniformity is crucial for the production of high quality malt. The varietal purity of thousands of tons of grain has to be inspected...

Variety Specific Agronomy Packages (VSAP) – DAN00129 Take home message: • Grain yield and grain protein concentration of wheat in a specific situation are generally negatively correlated. However initial investigations in 2011 indicate that the wheat variety LongReach Spitfire may have a greater grain protein concentration at a given yield level relative to other wheat varieties. • EGA Gregory ...

To design good variety mixtures it is important to understand the influence of varietal and environmental characteristics on mixing effect, e.g. what characteristics are more beneficial when all mixed varieties express it highly and what characteristics are more beneficial when the mixed varieties express it to varying extent. However, as it is generally impossible to manage more than a few exp...

This study employed the quadratic classification function analysis to examine the influence of farmer's socio-demographic and varietal characteristics of maize on adoption of improved maize varieties (IMVs) in the Wa Municipality of the Upper West region of Ghana. The results showed that, farm labour, information availability about the variety, weed resistance, low yielding variety, early matur...

Varietal purity and proportions of grains with brown spots, fissured grains, chalky grains andwhole grains in a rice sample are important grain quality attributes influencing consumers'preference and price but little information exist on how these grain quality attributes are affectedby biophysical factors and pre-harvest practices. Several authors have studied in isolation theeffect of biophys...

Abstract. Salinity constraints for Rice cultivation in Camargue mainly concern short periods (5-10 days) during the first cropping month (from germination to 5th leaf stages). Because of unfavourable climatic conditions, it is impossible to directly undertake breeding lines field screening. So greenhouse tests have been performed in order to specifically screen for varietal salt tolerance accor...

Grapevine (Vitis vinifera L.) is one of the world's most important crop plants, which is of large economic value for fruit and wine production. There is much interest in identifying genomic variations and their functional effects on inter-varietal, phenotypic differences. Using an approach developed for the analysis of human and mammalian genomes, which combines high-throughput sequencing, arra...

The basic diversity data of landraces has been found important to monitor the dynamics of crop genetic resource management. The diversity data generated in time and space have been valuable to communtities, scientists and policy managers to formulate and implement conservation strategies of in situ, on-farm as well as ex situ conservation and management of genetic resources. In this paper, we d...