Western flower thrips biological control in the summer Heidi Wollaeger , and Thomas Dudek, Michigan State University Extension - June 15, 2016 Greenhouse growers will need to adapt their biological control strategies for thrips with temperatures above 80 degrees Fahrenheit. Pheromone Lure specifically for Western Flower Thrips. Non-chemical methods. Consequently, we cannot compare the effect of the mites to chemical control, except in one case, for which biological control gave a greater degree of thrips suppression than did chemical control. A blueprint for successful thrips control A newly patented sachet for the predatory mite Amblyseius swirskii, now makes it possible to combat thrips infestations more efficiently than ever. Vigilance — spotting problems early and responding to … Western flower thrips and many other thrips species may be suppressed on greenhouse crop by releasing ( Amblyseius (Neoseiulus) cucumeris ), Amblyseius swirskii or predatory bugs, Minute pirate bug ( Orius insideosus ). This makes thrips ideal as models for testing the effectiveness of new pesticides and methods. Nagai, K. (1996) Integrated pest management of Thrips palmi Karny in eggplant fields, in G. Grey et al. Like all Defenders biological controls, Amblyseius is harmless to children, pets and wildlife and will not become a pest in its own right. BIOLOGICAL CONTROL Vine Weevil Control (Otiorhynchus sulcatus) Black Vine Weevil is a major pest of nursery stock and pot plants. Resistance Citrus thrips has a history of rapidly developing resistance to chemicals that are used repeatedly and frequently for its control. Because thrips have developed resistance to most registered pesticides, biological control is now the primary strategy for controlling thrips in greenhouse crop production. When biological control agents are being used for thrips control, they should be released when traps first indicate the presence of thrips. By then no adequate method for biological control of thrips was available. Hirose Y, 1991. Control Thrips with Biological Predators. Pest status and biological control of Thrips palmi in Southeast Asia. Biological control of thrips is more difficult than most greenhouse pests. Thrips lay their eggs in slits they cut in live plant stems. A.J.M. The empty cells are filled with air, which makes them look silvery with dark spots (excrements). Hirose Y, Kajita H, Takagi M, Okajima S, Napompeth B, Buranapanichpan S, 1993. Loomans Laboratory of Entomology, Wageningen University, P.O. AVRDC Publication, No. As part of a study on the biological control of thrips pests in European greenhouses, a general literature review has been carried out on thrips parasitoids. Researchers still found about 20 to 25% thrips damage on plants following the use of these biological predators. Scientific name, predator type, and comments associated with commercially available biological control agents of the Western flower thrips, Frankliniella occidentalis . ... thrips and red spider mite. It is recommended that specially made blue traps be used, rather than standard yellow traps; the blue traps seem to be more effective and it is easier to see the light-colored nymphs on blue than on yellow. Biological Thrip Control Product Details Defenders supply Amblyseius cucumeris in sachets known as "breeder" packs where the mites are mixed with bran. What is Thripex? Some species feed on insects and mites, and can therefore be important biological control agents, but thrips are better known as pests due to the damage that plant-feeding species cause in crops. Many insects control different life stages of thrips and there are numerous mycoinsecticides that also target them. Box 8031, 6700 EH Wageningen, The Netherlands Abstract Beneficial Nematodes are the easiest way to control thrips developing in the soil Biological Control: There are a number of commercially available biological agents to control thrips. Biological control. Green lacewings, predatory thrips, minute pirate bugs, mites, and few parasitic wasps assist in controlling plant-feeding thrips. ), Biological Pest Control in Systems of Integrated Pest Management, Food & Fertilizer Technology Center, Taipei, pp. If you want to encourage and conserve naturally occurring populations of these beneficial insects, do not create dust and consider regular rinsing of dust off of small plants. Re­ search on predatory mites of thrips had not yet resulted in a satisfactory solution Field evaluations were conducted to determine the efficacy of Orius strigicollis for biological control of Thrips palmi with different initial density in plastic houses.O. A number of practices are recommended to prevent or minimise the establishment of thrips on greenhouse crops. Loomans – Parasitoids as Biological Control Agents of Thrips Pests - 2003 1 Chapter 1 Evaluation of hymenopterous parasitoids as biological control agents of thrips pest in protected crops: introduction1 Antoon J.M. Pesticides are often used to control western flower thrips (Frankliniella occidentalis) in horticultural crops. 91-342:57-60. Often the first sign that western flower thrips is present in a crop is the failure of insecticide to control thrips. Control. Thrip management is a matter of garden maintenance — reducing the places where thrips may breed — and requires removing plant debris while it’s still on the ground and green. The predatory mites did less well than the predatory bugs in terms of thrips control, despite the fact that they had built up a good population with the chosen food source. Thrips attack a wide range of crops including vegetables, fruit trees and ornamental plants. But to keep this new tool effective, growers will have to use this chemical wisely. READ PAPER. strigicollis released three times after 0, 5, 30, 100 thrips were inoculated per 30 cucumber plants. Thrips develop resistance to insecticides easily and there is constant research on how to control them. The use of predatory mites, especially Neoseiulus cucumeris (Thripex) often forms the backbone of the biological programme to control thrips on strawberries. Control Thrips with Biological Predators. BIOLOGICAL CONTROL 01 843 7808 70 www.nad.ie. 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