Person: Gerpacio, R.V.
Loading...
Email Address
Birth Date
Research Projects
Organizational Units
Job Title
Last Name
Gerpacio
First Name
R.V.
Name
Gerpacio, R.V.
3 results
Search Results
Now showing 1 - 3 of 3
- Towards reduced pesticide use for cereal crops in Asia(CIMMYT, 1997) Pingali, P.L.; Gerpacio, R.V.Several opportunities are available for dramatically reducing the use of agrochemicals in Asia cereal crop production. The first selection of this paper summarizes past trends and future prospects for pesticide use in Asia for three major cereal crops: rice, wheat, and maize. The second section identifies factors that have contributed to rising farm-level demand for pesticides and factors that could lead to a reduction in their demand. The third section highlights the advances that have been made in generating and disseminating cereal crops with resistance to insects and diseases. It focuses on conventional breeding strategies for host-plant resistance as well as the current and potential contributions of biotechnology. Pesticide productivity, yield variabiliy, and their relation to host-plant resistance are reviewed, along with evidence from trials and farmers' fields. The paper concludes with a discussion of the integrated management approaches that will be necesary for maximizing and sustaining the productivity gainsoffered by resistant varieties.
Publication - Tropical and subtropical maize in Asia: production systems, constraints, and research priorities(CIMMYT, 2007) Gerpacio, R.V.; Pingali, P.L.This book examines future technological and policy prospects for the sustainable intensification of rainfed upland maize production in Asia, and derives R&D priorities for specific maize production environments and markets. Village-level and farmer-group surveys were conducted to characterize upland maize production environments and systems in China, India, Indonesia, Nepal, the Philippines, Thailand, and Vietnam. Survey findings, particularly farmer-identified constraints to maize production, complemented with other relevant data, were used in country-level, R&D priority-setting workshops. High on the list of farmer constraints was drought, estimated to affect three production environments that are home to about 48 million rural poor and produce an estimated 16 million tons of maize, and others such as downy mildew, stem borers, soil erosion/landslides, waterlogging, poor agricultural extension/ technology transfer services, and poor access to low-interest credit and markets. Farmers felt that socioeconomic and policy-related constraints impact maize productivity more than technical constraints do. It is important to recognize that technology is not the only key to increasing productivity and bettering the conditions of marginal maize farmers in Asia. There is a growing trend towards commercializing and intensifying maize production that is different from the staple food self-sufficiency paradigm that has been the cornerstone of agricultural policy in most developing countries. Appropriate government policies could help alleviate the adverse consequences of commercialization and promote sustainable intensification of maize production, especially in marginal environments inhabited by resource-poor subsistence farmers.
Publication - Maize in India: production systems, constraints, and research priorities(CIMMYT, 2005) Joshi, P.K.; Singh, N.P.; Singh, N.N.; Gerpacio, R.V.; Pingali, P.L.Maize is a promising substitute crop allowing diversification from the rice-wheat system in the upland areas of India. The crop has high production potential, provided the available improved hybrids and composites reach the farming community. This study found that major biotic production constraints were Echinocloa, Cynodon dactylon, rats, and termites, which reduced maize production levels by more than 50%. Other important abiotic and biotic stresses listed in descending order of importance were: caterpillars, water stress, stem borers, weevils, zinc deficiency, rust, seed/seedling blight, cutworm, and leaf blight. Non-availability of improved seeds, inadequate input markets, ineffective technology dissemination, and lack of collective action were the principal socio-economic constraints.
Publication