The widespread indiscriminate use of highly persistent and toxic plant protection products has, over a long period of time, highlighted the negative aspects of the chemical defence of crops (accumulation of residues at the top of food chains, ecological impairment caused by pollution of water, etc). The distribution of useful insects on crops without doubt represents a crucial phase in biological control strategies and at the same time the most critical as the particular biological characteristics of useful insects must always be taken into consideration. Distribution is usually carried out manually and is quite a demanding task for the operator. In addition to aspects linked to the cost of this type of intervention, the manual distribution of living organisms also affects the efficiency of the distribution of the useful insect above all if it is not very mobile or in particular biological phases. Special attention must be given to the choice the quantities and the uniformity of distribution, which differ for each organism released and the crop and type of breeding. The use of an operator can be considerably reduced by substituting manual with mechanical distribution, resulting in higher work capacity, improved intervention speeds and reduced running costs compared with manual means. From this derives the importance of mechanize the operation and therefore the value assumed by the prototype, used in this study, for the distribution of useful organisms. In this study was analyzed a prototype for a mechanical distribution of entomophages, in laboratory and in a protected crop, and have been checked the functional and working parameters in the modern productions.
|Titolo:||Mechanical System Control in Biological Farming for Protected Crops|
|Data di pubblicazione:||2009|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|