Exposure to bioaerosols in occupational settings is associated with a range of adverse health effects. The aim of this study was to investigate the exposure levels to dust and endotoxin of people working in two cucumber nurseries and two tomato nurseries. Exposure was measured for greenhouse workers (n = 70) mainly working on harvesting cucumbers and tomatoes and clearing the plants after the h...

Growing greenhouse vegetables is one of the most exacting and intense forms of all agricultural enterprises. In combination with greenhouses, hydroponics is becoming increasingly popular, especially in the United States, Canada, western Europe, and Japan. It is high technology and capital intensive. It is highly productive, conservative of water and land and protective of the environment. For p...

The embryogenic capacity of seven cucumber (Cucumis sativus L.) cultivars was examined by tissue culture of cotyledon, young first-leaf, and internode explants. Somatic embryogenesis frequencies differed significantly among the tested cultivars, and ‘Fushinarimidori’ produced the highest number of embryos from either cotyledons or young first leaves. Cotyledonand first-leaf-derived calluses pro...

abstract soilless culture of greenhouse vegetables has been a fast developing section in iran during recent years. most growers use hydroponics systems with artificial substrates. some of the used substrates have low water retention which results in wasting a great deal of solution. on the other hand, low vigor of cucumber root in water and fertilizer absorption, especially in low media tempera...

melon ladybeetle, epilachna chrysomelina (f.) is one of the most injurious cucurbit attacking pests. sampling program and host preference of this ladybeetle were studied in ahvaz, southwest iran. suitable sample size, suitable location for sampling as well as suitable sampling life stage of the insect were obtained to be 12 on, lower leaf surface and egg stage of the ladybeetle, respectively. e...

ABSTRACT Plant growth-promoting rhizobacteria (PGPR) strains INR7 (Bacillus pumilus), GB03 (Bacillus subtilis), and ME1 (Curtobacterium flaccumfaciens) were tested singly and in combinations for biological control against multiple cucumber pathogens. Investigations under greenhouse conditions were conducted with three cucumber pathogens-Colletotrichum orbiculare (causing anthracnose), Pseudomon...

Fertigation systems, especially hydroponic systems with recirculating nutrient solution, are an ideal environment for algal growth, but it is not clear if this contaminant affects the crop. Therefore, greenhouse experiments were carried out to monitor the development and composition of algae, as well as their effects on lettuce and cucumber performance. In addition, several different substrates...

the reaction of nineteen different cultivars of cucurbita spp. including cucurbita pepo, cucurbita maxima and lagenaria siceraria to phytophthora capsici, phytophthora melonis and phytophthora drechsleri was studied under greenhouse conditions. plants were grown in steam sterilized soil. one-month-old plants were inoculated with vermiculate hempseed extract inocula of phytophthora and were floo...