[Efficiency of the technology of complex protection of tomatoes from pests and diseases in green houses]
Prishchepa, I. | Zherdetskaya, T. | Kolyadko, N. | Dolmatov, D.(Institute of Plant Protection, Priluki (Belarus))
Protected ground (green housing) conditions promote quick phytophage reproduction and their high harmfulness has been analyzed. Every year in the greenhouses whitefly, spider mite, cotton and peach aphid, gall nematode development is observed. The number of harmful organisms in the protected ground is significantly less than in the natural conditions, but constant accumulation and absence of naturally regulating factors significantly increase their harmfulness. As a result, to decrease phytophage number it is necessary to increase the number of plant treatment with acaricides and insecticides, which makes worse the ecological situation in greenhouses, leads to insect resistance. One of the alternatives of phytosanitary situation management in greenhouses is the use of entomophages. However, parasite and predator releases (Phytoseilus, Encarsia, Macrolophus) go parallel with the insecticide and fungicide treatments (against thrips, aphid). The success of the combined use of pesticides and entomophages greatly depends on the degree of preparation toxicity for useful insects. At present in the greenhouse concerns of the country practically no thermal soil ground desinfection is done and also seeds import from other states is comes without any control. It seriously aggravated the phytosanitary situation in the protected ground. The harmfulness of fusarium and bacterial wilt, bacteriosises, gray mould, powdery mildew, late blight is sharply increased
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