Transgenic Crops describes the basics of genetic modifi cation for agricultural purposes and a brief history of the technology and the governing policies surrounding it. This publication offers a brief overview of the main agricultural crops that have been genetically modifi ed, the characteristics they express, and the market roles they play. Unintended consequences, economic considerations, a...

Bacillus thuringiensis (Bt) crops, genetically modified to express insecticidal toxins that target key pests of corn, cotton, rice, potato, and other crops, have been rapidly adopted and have become dominant fixtures in agroecosystems throughout the world. Due to the constitutive nature of Bt toxin expression, insecticidal proteins may be found in nearly all plant tissues, presenting multiple s...

background: aflatoxins are fungal toxins which may be present in some foods and due to their negative health effects, represent a major concern for humans and food industries. in the present study, total aflatoxin contamination in products from eight feed materials production centers located in qom city of iran were evaluated by an elisa technique in november 2012. methods: a total of 40 feed s...

Transgenic crops offer a complex new technology that is not universally dominant over alternatives. Instead, adoption decisions are conditional on incentives associated with alternative technologies and local conditions. These characteristics imply that transgenic crops can be expected to be adopted on a wide scale in existing cultural areas, if incentives are appropriate. Further, considerable...

There are various designs of tools and equipment used for harvesting the crops and threshing it separately. Sickles, hand tools and reapers for grain crops and diggers for tuber crops and rhizomes, operated with different power sources are used. Combine harvesters, both tractor mounted and self-propelled, are being very widely used for different grain crops. Functional requirements and principl...

Root crop production in Papua New Guinea is reviewed. Crops considered are the major ones (Ipomoea batatas, Colocasia esculenta, Dioscorea aiata, D. escuienta, Xanthosoma sagitti!olium), other significant root crops (Manihot esculenta, Psophocarpus tetragonolobus, Cyrtosperma chpmissonis., Alocasia macro"htza and Solanum tuberosum) and 27 minor crops. For the major and significant crops, aspect...

Plant virus diseases cause severe constraints on the productivity of a wide range of economically important crops worldwide. In India the Green Revolution ushered in intensive agricultural practices and reduced varietal diversity, resulting in the emergence of viral diseases at an alarming pace in the cultivated crops. Some such diseases, which are especially relevant to India, along with their...

Through the use of the new tools of genetic engineering, genes can be introduced into the same plant or animal species or into plants or animals that are not sexually compatible-the latter is a distinction with classical breeding. This technology has led to the commercial production of genetically engineered (GE) crops on approximately 250 million acres worldwide. These crops generally are herb...

Herbicide tolerant (HT) crops are not a new phenomenon – in fact, all crops are to some extent tolerant to herbicides. Many herbicides are dose-specific for particular plant groups, for example grasses, and these can be used on broad-leaved crops like potatoes and oilseed rape without causing unacceptable harm. This is the basis for most current agricultural practice in developed countries. Gen...