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Libros y Manuales de Agronomia

Manual de plagas de los productos almacenados. pdf gratis

Lo^ almacencs son ecotiistemas artificiales pobres y relativamente aislados del exterior, donde se presentan un^► serie de especies, tanto artrópodos como roedores o pájaros, que pueden destruir, dañar o devaluar entre un 10 y un 30^% de los productos depositados en éstos, segím la FAO. Estas variaciones dependen de multitud de factores
tales como tipo de almacén, zona en que se encuentra (condiciones climáticas), tipo de material almacenado, mancjo del mismo, técnicas de con^rol empleadns, etc., siendo mayoreti Ins pérdidas en las zonas tropicales.

El contaclo dcl hombre con las pla^as de los productos almcenados viene de antiguo, ya que se dio cuenta por prime ra vez de su presencia cuando empezó a acumular reservas alimenticias.

Sin embargo, no todo lo quc encontramos sobre un producto almacenado es una verdadera pla^a. En la fauna de almacén podemos distinauir dos grandes ^rupos de especies:
* Las verdaderas plagas de almacé ►^. Son aqucll^► s que dependen
del pcoducto almacenado para su desarrollo y representan un número
m^► y pequeño, siendo fundamentalmente artrópodos: el 75 ^/^
son coleópteros o escarabajos; el 15 % son mariposas o lepidbpteros
y el resto son ácaros, cucarachas, etc.
^ EI resto. En este grupo estarían una ^crie de especies también
perjudiciales que pueden tener tanta importancia como el grupo anterior, a pesar de que no se reproduacan continuamente en el almacén y una serie de especies depredadoras y parásitas del resto de la fauna presente. Entre las especies perjudiciales tenemos las introducidas accidentalmente con el producto, como algunos artrópodo^
(por ejemplo el gorgojo de las Ientejas), o los roedores y pájaros que cntran en los recintos atraídos por el alimento, así como las especies yuc ticn^n hábitos nerr^ítl^^os, fun^^ívoros, etc. T^^das cllas contribuycn i^ru^ilmente a la desU^ucci^ín cíel produc^o ^ilmaccnado al consumir p^u^te del mismo y/^i ensuciarlo con sus mu^las, dcyrcciones, etc


Te puede interesar  Manual de Plagas de granos almacenados. pdf gratis



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