The Effect Evaluation Of Five Kinds Resource Of Light For Pests Trapping In The Vegetable Field

Green prevention and control of crops is one of the important measures to protect the safety of agricultural production, quality and safety of agricultural products and agro-ecological safety. Light trapping as Green prevention and control of the important measures have been widely used. Although the use of light trapping reduce the use of field chemicals, the natural enemies and neutral insects be killed to a certain extent and this problems should be solved. To this end, we use five different light sources, to study the type, quantity, and population dynamics of pests of vegetable, and systematic review the effects of five light insecticidal lamps on natural enemies and neutral insects in order to find a specific and well trapping for pests. The main research results are as follows:1. Light trapped insect types and species of vegetable fieldsFrom May to October,2011, lighted70days, seduced insects preliminary statistics for215species of13orders and95families, including about175species of pests of44families and5orders, and all kinds of neutral insects, natural enemy collected about39species of9orders,21families.2. Population fluctuation of main light trapping insectsLate may and June is high-risk period of most underground pest, moreover, the mole cricket and cricket can be in mid-July on the high degree of concentration, M. hippocastani mongolica can be collected separately in late August.The early to mid May is occurrence peak of P. xylostella. S. exigua and P. litura is omnivorous, to occur during the peak period in mid-August to September. Late September is collecting peak of H, recurvalis. D. indica in the middle of August, had collected on good effect.For the feeding the flowers and food pests, H. armigera in mid-June, H. assulta in mid-July to mid-August, E. zinckenella in September in large trapping quantity, D. indica quantity is relatively small.For the sucking pests, A. suturalis, L. Iucorμm and leafhoppers concentrated in July and August occurs, A. suturalis in mid and late July and late August and L lucorμm mid on September had the biggest quantity of trapping. The leafhoppers peak is not particularly obvious, E. flavescens and N. bipunctatus occurrence peak in July a clear peak, in addition, the latter in late August have the other a peak.Hydrophilid had large trapping quantities in July and the middle of August. Dytiscidae was less collected, mainly in the middle of June to mid August.Most Natural enemy is trapped in the middle of June and had large trapping quantities, in addition to parasitoid and other carabid had less collection. Moreover, many carabid and xantnorinussp were trapped; we should avoid turning on the light.3. Trapping effect of five kinds resource of lightThe5light sources traping results of the main vegetable pests:the1st to L. lucorpim collected the best effect, trapping amount is significantly more other light source; the2nd on A. corpulenta, A. ypsilon, H. armigera, H. assulta, H. recurvalis, H. recurvalis, D. indica, E. zinckenella and M. testulalis effect collected were well, better than1st; the3rd to P. xylostella, S. exigua and D. indica collected is the best effect, significantly better than the1st; the2nd and4th to A. suturalis amount collected significantly greater than the1st.Comparison of the trapping effect of neutral insects’effect of5light sources:the2nd and3rd light trap catches for hydrophilid on the5th was significantly less than other light sources; the Dytiscidae amount of traps in the3rd largest that difference was not significant on the1st, meanwhile the smallest on the5th.Comparison of the trapping effect of natural enemies’effect of5light sources: the5th had a minimum damage effect to xantnorinussp, ladybird, tiger beetles. The2nd on carabid, the4th on lacewing, and the3rd on parasitoid, damage the role of the effect of the smallest.Through the analyses of Natural Enemy/Pest Index, the Natural Enemy/Pest Index of total light trapping insects is0.061. Among the five light sources; the Index of the5rd is the lowest and the2nd is the highest.All in all, the2nd on pest trapping better, but neutral insects and natural enemies killing effect is relatively large; on the5th smallest neutral insects and natural enemies of mass destruction, but the trapping pests effect is inferior to the2nd and the 3rd; the3rd trapping pests, natural enemies and neutral insects volume larger, but Natural Enemy/Pest Index is lower.