| Asian corn borer (ACB), Ostrnia furnacalis (Guenée), is the most serious and harmful insect pestfor maize production in Heilongjiang Province. It becomes more serious in recent years. The controleffects of single green control technique and integrated multiple green control techniques against Asiancorn borer were carried out in2010and2011in corn field conditions, respectively. The appropriaterelease number of Trichogramma, application dosage of Bt or setting number of lights of the singlegreen control technique was determined by mesuring of number of trapped ACB moth, parasitism rateof ACB eggs, control effect and decrease of corn yield loss. The single green control technique andintegrated multiple green control techniques were evaluated by the control efficacy, yield and quality ofcorn, input cost, Input-output ratio, economic, social and ecological benefits to determine the best greencontrol model for ACB control in Heilongjiang Province, thus the application techniques for field usewas further improved.The control effect was69.30%,66.35%,76.15%and45.27%, respectively, and the restoration rateof the corn yield loss was8.58%,7.95%,9.64%and5.56%, individually. Input-output ratio was1:33.81,1:28.07,1:15.28and1:4.15, separately, in4different single green control technique for controlling cornborer, which including setting projection-type month-killing lamp, releasing Trichogramma,spraying Bt wettable powder (WP) and setting sex pheromone traps.The control effect was83.55%,85.26%,87.28%,89.57%,84.74%and86.75%, respectively, therestoration rate of the corn yield loss was15.55%,16.13%,16.97%,17.53%,15.66%and16.50%,individually. Input-output ratio was1:57.23,1:25.76,1:19.41,1:17.53,1:9.23and1:8.48, separately, in6integrated multiple green control techniques for corn borer control, which including projection-typemonth-killing lamp setting+suspension sex pheromone core, projection-type month-killinglamp+Trichogramma release, projection-type month-killing lamp+Bt WP spray, TheTrichogramma release+Bt WP spray, Sex pheromone traps+Trichogramma release and sexpheromone traps+Bt WP spray.The results showed the optimal application time was ACB adult stage, oviposition stage and younglarval stage, respectively, for setting projection-type month-killing lamp, releasing ofTrichogramma and spraying Bt WP. Trichogramma release+Bt WP spray, projection-typemonth-killing lamp setting+Bt WP spray, projection-type month-killing lamp setting+Trichogramma release, Bt WP spray+suspension sex pheromone core, core was optimal integratedmultiple green control technology assembly.The single green control technique model might be applied in the medium ACB occurred year orfield (generally80to120live larvae/one hundred stalks). The projection-type month-killing lampcontrol technique might be applied in the plots near the village or with more corn stalk piles. Release ofTrichogramma control technique model might be used in large areas. The Bt WP spray might be appliedin corn fields which planted scatteredly with a smaller area or in corn fields without controlled neitherby releasing Trichogramma nor by lamp during emerging stage of the overwintering generation. If the ACB occur more seriously (generally120to200live insects/one hundred stalks) more thanthe medium occurence, Bt WP spray model was applied in the condition of lower level.,Projection-type month-killing lamp setting+suspension sex pheromone lures integrated model wasapplied in the condition of higher level near the village or with more corn stalk piles.projection-type month-killing lamp setting+Trichogramma release integrated was applied in theplots with large area of contiguous of corn planting areas far from the village. In the ACB is moreserious (generally more than200live larvae/one hundred stalks), Trichogramma release+Bt WP sprayor projection-type month-killing lamp setting+Bt WP dpray assembly model was applied. |
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