行政院農業委員會台南區農業改良場  研究彙報第23號

番茄夜蛾性費蒙田間應用之研究

顏福成 張賜海 黃天福

摘  要

顏福成、張賜海、黃天福.1989.番茄夜蛾性費洛蒙田間應用研究。台南區農業改良場研究彙報23:13~35。

配合國科會暨農委會開發性費洛蒙計畫,茲將3年來辦理結果摘要如次:

1.含性費洛蒙主要成份Z-11-16Ald,Z-9-16Ald及Z-11-14Ald共6種不同比例之組合,於1月在田間測定結果以9:1:0之誘殺效果最佳,且優於3隻處女蛾之誘殺效果(138:30)。其次為8:1:1(74)。

2.每個誘蟲器使用之劑量,以9:1(Z-11-16Ald:Z-9-16Ald)於1-3月間,每盒以4mg誘殺效果較佳,1.0∼3.5mg次之。0.5mg較差。

3.性費洛蒙有效期間在30天以上。

4.不同施放器,塑膠管與橡皮帽對誘殺效果之影響差異不顯著。

5.雄蛾被費洛蒙引誘後之粘著點,自性費洛蒙懸掛點半徑10cm內占26.5%,20cm內70.2%,30cm內83.5%,40cm內92.3%。直接進入瓶內者7.7%。

6.不同誘蟲器之誘殺效果以濕式及粘著式較理想,武田式及保特瓶甚差。

7.保特瓶不同開口構造中,以雙層式瓶底開口較佳,內瓶頸之有無誘殺數之影響差異不顯著。

8.多種構造之保特瓶的誘殺效果不理想,皆較粘著式差。

9.台南本市場內以落花生為主之試驗田觀察結果,番茄夜蛾周年有兩次發生高峰,即在3∼6月及9∼11月間,其中以前者發生量較多,尤以4月下旬最高。在落花生主產地,雲林縣海岸地區(褒忠等),周年亦有兩次發生高峰,即5∼6月及10∼11月間,其中以後者發生量較多,尤以11月上旬最高。褒忠之發生量遠較台南多。

10.田間雄蛾之誘殺數與幼蟲之發生數有密切關係,秋作常在成蟲開始大量發生5∼15天後,春作在20∼30天後有幼蟲之開始大量發生現象,但易受氣象等因素影響。

11.應用性費洛蒙大量誘殺法時,每公頃以16∼25處為理想。

12.番茄夜蛾,斜紋夜蛾及甜菜夜蛾等3種性費洛蒙,同時應用大量誘殺法時,誘蟲器相隔以2m以上為宜。

13.於番茄田應用交信攪亂法,每點供5mg,每公頃用1g(200點)及2g(400點),對雄蛾之引誘阻碍不理想,約80%。但用4g(800點)時,阻碍率在28天內有97%以上,34天內90%以上,似已有阻碍作用之表現。


Application of Sex Pheromone of Tomato Fruit Worm (Helicoverpa Armigera) in the Field

F. C. Yen, S. H. Chang and T. F. Huang

Summary

 1. Six different combination of sex pheromones z-11-16 Ald, z-9-16 Ald and z-11-14 Ald were used to trap male moth of tomato fruit worm in January, 1986.  Best result was observed in the ratio of 9:1:0 which is better than that by using 3 virgin females (138:30).  The ratio of 8:1:1 was the next (74).  The a-11-14 Ald seemed to be no effect.

2. With regard to the ratio of 9:1 (z-11-16 Ald : z-9-16 Ald), the dosage of 4 mg/trap obtained the best result from January to March in 1986, following 1.0-3.5 mg/trap.  The result of less than 0.5 mg/trap was poor.

3. The effectiveness of sex pheromone could be lasted for more than 30 days.

4. For the efficacy of different types of dispensers, not much difference was observed between plastic dispenser and rubber dispenser.

5. For the landing points of the male moths trapped by sex pheromone, the percentages of these points within the range of 10 cm, 20 cm, 30 cm and 40 cm from the traps are 26.5%, 70.2%, 83.5% and 92.3%, respectively.

6. Different types of traps obtained different results.  The water through trap and sticky paper types were better than Takeda trap and PET bottle types.

7. Among the different structures of PET bottle type traps, the type of two segments with the bottom open was the best.  It is non-significant for trapping whether there is a inner bottle neck or not.

8. The effect of the different PET bottle type traps was poor than that of sticky type.  This needs to be continuously studied.

9. The population dynamics of tomato fruit worm had two peaks each year in the peanut field in Tainan.  These two peaks are from March to June, and from September to November.  There are also two population peaks from May to June and from October to November in Paochung annually.  The amount trapped in Paochung is much higher than that in Tainan.

10. The relationship between the amount of trapped male moths and larvae was significant in the peanut field.  Usually 5 to 15 days after adult out-breaking in the first crop, 20 to 30 days in the second crop, a large number of male moths were trapped, and also a lot of larvae were found.  It might be affected by the weather condition.

11. The optimum number of sex pheromone for mass trapping is 16 to 25 traps per hectare.

12. When we combine the three types of sex pheromones for mass-trapping of tomato fruit worm, tobacco cut worm and beet army worm, the distance between 2 traps must be greater than 2 meters.

When the disruption method is applied and 5 mg of sex pheromone per point is used in tomato field, the inhibition of attraction is only about 80% with the amounts of 1 g (200 points) and 2 g (400 points) per hectare.  If 4 g (800 points) per hectare is used, the trapped percentage is more than 97% in 28 days, and more than 90% in 34 days.  This shows the better result for the interruption.



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