| Abstract: | Sufficient hygiene is an important instrument in preventing infestations of glasshouse crops. Since chemical soil sterilization is more and more restricted, soil-steaming and closed growing systems are coming more and more in use. With closed systems, the question of disinfecting the circulating nutrient solution arises. Screens of different mesh are being tested for the exclusion of pests from glasshouse crops. More and more attention is being paid to the influence of the glasshouse microclimate on the occurrence and spread of pests. Various aspects are discussed in relation to temperature, humidity, leaf wetness, radiation, etc. |
