One of the largest livestock problems in Southern Brazil has been the scantiness of varieties of forage species more adapted to this region. In addition, due to global warming and the demand for increased productivity with reduced use of inputs, there is a need of studies on germplasm tolerance to abiotic stresses such as drought, and the evaluation of symbiotic organisms to promote biological nitrogen fixation in grasses. Thus, this project aimed to develop improved populations of some of the m

Status: Completed     Start date: Sun Jan 01 00:00:00 GMT-03:00 2012

Rio Grande do Sul (RS) has the second highest state production of milk in the Brazilian Federation. Such an activity is widespread throughout the state, involving a significant share of farmers, with great economic and social relevance for generating wealth and income and contributing to the maintenance of a significant share of the state's population in the countryside. RS is located in a region with temperate clime, which has peculiar characteristics of climate, soil, vegetation cover, cattle

Status: Completed     Start date: Fri Aug 01 00:00:00 GMT-03:00 2014

The pest aphids Sipha flava and Rhopalosiphum padi have caused significant injuries in elephantgrass and brachiaria swards, respectively. Thus, the objective of this project was to evaluate the bioecology of these pest insects and the predator Chrysoperla externa. The biological aspects of the pests were studied at 12, 16, 20, 24, 28 and 32ºC. Temperatures of 20ºC and 24ºC were more favorable for insect development, and this temperature range is the most appropriate for t ...

Status: Completed     Start date: Wed Aug 01 00:00:00 GMT-03:00 2007

The spittlebug, Mahanarva spectabilis, causes two types of injury to forage crops. The nymphs constantly suck the sap, causing the whole plant to yellow. The other type of damage is caused by the adult spittlebug, which feeds on shoot, leaves and sprouts, causing a phytotoxic response that varies among grass species used in pastures. Given the impact of this insect on forage crops, it is important to understand how global changes may influence its ecology and thus assess whether future i ...

Status: Completed     Start date: Wed Dec 01 00:00:00 GMT-03:00 2010