The larvae of some species of Scarabaeidae, known locally as chisas (whitegrubs), are important pests in agricultural areas of the Cauca, Colombia. They form a complex consisting of many species belonging to several genera that affect the roots of commercial crops. The objective of the present ...
Pardo Locarno, LC
,
Montoya Lerma, J
,
Bellotti, Anthony C.
,
Schoonhoven, Aart van
,
[Structure and composition of the white grub complex (Coleoptera: Scarabaeidae) in agroecological systems of Northern Cauca, Colombia]
,
Structure and composition of the white grub complex (Coleoptera: Scarabaeidae) in agroecological systems of Northern Cauca, Colombia
Schoonhoven, Aart van
,
[The Bean Program at the Centro International de Agricultura Tropical (CIAT)]
,
The Bean Program at the Centro International de Agricultura Tropical (CIAT)
Information on bruchids on bean grain (Zabrotes subfasciatus and Acanthoscelides obtectus) is given for farmers, explaining aspects such as: oviposition behavior, morphological characteristics of the adult, type of damage, and adaptation to temp. Practices to avoid or prevent damage by bruchids a...
Alomia de Gutierrez, B.
,
Schoonhoven, Aart van
,
[Proteja su cosecha de frijol contra el ataque de los gorgojos]
,
Proteja su cosecha de frijol contra el ataque de los gorgojos
Smallholders with dual-purpose cattle production systems in most Central America experience a shortage of forages during the dry season (4-8 month. As a result, substantially lower milk production and weight gain occurs. Dual-purpose operations seeking to maximize milk and beef production in the ...
Schoonhoven, Aart van
,
Holmann, Federico J.
,
Argel M., Pedro J.
,
Pérez, E.
,
Ordoñez, Jenny C.
,
Chaves, J.
,
[Estimation and comparison of benefits due to feeding hay and silage during the dry season on commercial dual-purpose cattle production systems in Honduras and Costa Rica.]
,
Estimation and comparison of benefits due to feeding hay and silage during the dry season on commercial dual-purpose cattle production systems in Honduras and Costa Rica.
La composición y variación de la riqueza del complejo de larvas Melolonthidae se examinó en cuatro circunstancias agroecológicas en los municipios de Caldono y Buenos Aires, Cauca (1400 a 1500 m.s.n.m, 21,5ºC. y 2000 mm/año de precipitación promedio). Quincenalmente, durante un año, se visitaron ...
Pardo Locarno, LC
,
Montoya Lerma, J
,
Schoonhoven, Aart van
,
Moron, MA
,
[Riqueza del complejo chisa (Coleoptera: Melolonthidae) en cuatro agroecosistemas del Cauca, Colombia]
,
Riqueza del complejo chisa (Coleoptera: Melolonthidae) en cuatro agroecosistemas del Cauca, Colombia
Smallholders with dual-purpose cattle production systems in most Central America experience a shortage of forages during the dry season (4-8 month. As a result, substantially lower milk production and weight gain occurs. Dual-purpose operations seeking to maximize milk and beef production in the ...
Schoonhoven, Aart van
,
Holmann, Federico J.
,
Argel M., Pedro J.
,
Pérez, E.
,
Ordoñez, J.C.
,
Chaves, J.
,
[Estimation and comparison of benefits due to feeding hay and silage during the dry season on commercial dual-purpose cattle production systems in Honduras and Costa Rica]
,
Estimation and comparison of benefits due to feeding hay and silage during the dry season on commercial dual-purpose cattle production systems in Honduras and Costa Rica
Al examinar la composición y variación de la abundancia del problema de plagas subterráneas tipo chisa (larvas de Coleóptera Melolonthidae) en Caldono y Buenos Aires, dos localidades agrícolas del departamento del Cauca (altitud: 1.400 a 1.500 msnm; T°: 21,5°C (promedio); precipitación: 2.192 mm/...
Pardo Locarno, LC
,
Montoya Lerma, J
,
Schoonhoven, Aart van
,
[Abundancia de chisas rizófagas (Coleoptera: Melolonthidae) en agroecosistemas de Caldono y Buenos Aires, Cauca, Colombia = Abundance of whitegrubs (Coleoptera: Melolonthidae) in two Colombian agroecosystems]
,
Abundancia de chisas rizófagas (Coleoptera: Melolonthidae) en agroecosistemas de Caldono y Buenos Aires, Cauca, Colombia = Abundance of whitegrubs (Coleoptera: Melolonthidae) in two Colombian agroecosystems
An expt. to study the background soil effects associated with var. resistance in bean pest populations, virus incidence and yield was carried out at the Centro Internacional de Agricultura Tropical (CIAT), Palmira, Colombia from Jan.-March, 1978. The effect of the treatments and of the var. on Em...
Hohmann, C.L.
,
Schoonhoven, Aart van
,
Cardona, C.
,
[Manejo de pragas do feijoeiro (Phaseolus vulgaris, Linnaeus, 17S3) atraves da utilizacao de cobertura de solo associada a resistwncia varietal]
,
Manejo de pragas do feijoeiro (Phaseolus vulgaris, Linnaeus, 17S3) atraves da utilizacao de cobertura de solo associada a resistwncia varietal
The effect of maize/bean intercropping on Empoasca kraemeri population and damage, populations of other phytophagous insects, the parasitic action of Anagrus sp. on E. kraemeri, ambient temp. and RH, light intensity, and bean leaf temp. was observed. Two planting dates and 3 maize densities in 2 ...
Hernández R., J.C.
,
Vera G., J.
,
Schoonhoven, Aart van
,
Cardona Mejía, César
,
[Efecto de la asociacion maiz-frijol sobre poblaciones de insectos plagas, con enfasis en Empoasca kraemeri Ross & Moore]
,
Efecto de la asociacion maiz-frijol sobre poblaciones de insectos plagas, con enfasis en Empoasca kraemeri Ross & Moore
Approx 20 insects and mites were found attacking cassava in several regions of Colombia at different growth stagcs and seasons. Thrips (Frankliniella williamsi), gall midges (Cecidomyiidae) and whiteflies (Bemisia sp. and Trialeurodes sp.) were present in greater than 50 percent of the plantation...
Díaz, R.O.
,
Bellotti, Anthony C.
,
Schoonhoven, Aart van
,
[Insectos y acaros que atacan el cultivo de la yuca en Colombia]
,
Insectos y acaros que atacan el cultivo de la yuca en Colombia