scholarly journals Control of the Beet Armyworm, Spodopter exigua (HUBNER) (Lepidoptera : Noctuidae), Using Synthetic Sex Pheromone : I. Effect of Communication Disruption in Welsh Onion Fields

1989 ◽  
Vol 24 (4) ◽  
pp. 387-397 ◽  
Author(s):  
Sadao WAKAMURA ◽  
Mikio TAKAI ◽  
Shuji KOZAI ◽  
Hitoshi INOUE ◽  
Izumi YAMASHITA ◽  
...  
Keyword(s):  
Sex Pheromone ◽  
Beet Armyworm ◽  
Welsh Onion ◽  
Communication Disruption ◽  
Synthetic Sex Pheromone ◽  
Lepidoptera Noctuidae

scholarly journals Control of the Beet Armyworm, Spodoptera exigua (Hübner), on the Welsh Onion by Synthetic Sex Pheromone.

1992 ◽  
Vol 34 (0) ◽  
pp. 45-46 ◽  
Author(s):  
Masanori YAMAMOTO ◽  
Atsushi KONDO ◽  
Yasuhiro HIRAI ◽  
Yasuo IWASAKI ◽  
Toshio SENBA ◽  
...  
Keyword(s):  
Sex Pheromone ◽  
Spodoptera Exigua ◽  
Beet Armyworm ◽  
Welsh Onion ◽  
Synthetic Sex Pheromone

The influence of behaviour modifying chemicals on mating success of the red bollworm Diparopsis castanea Hmps. (Lepidoptera, Noctuidae) in Malawi

1976 ◽  
Vol 66 (2) ◽  
pp. 279-300 ◽  
Author(s):  
R. J. Marks
Keyword(s):  
Sex Pheromone ◽  
Sexual Attraction ◽  
Practical Method ◽  
Pheromone Trap ◽  
Cotton Field ◽  
Field Cage ◽  
Synthetic Sex Pheromone ◽  
Trap Catches ◽  
First Time ◽  
Lepidoptera Noctuidae

AbstractThe synthetic sex pheromone (dicastalure) of the red bollworm of cotton, Diparopsis castanea Hmps., in Central and Southern Africa, and an inhibitor of male sexual attraction (trans-9-dodecenyl acetate,=IIA), were used in an enclosed 0·2 ha cotton field-cage to reduce successful female matings. Over one month dicastalure at 21·0 and 42·3 g/ha produced average reductions in mating of 47·9% and 72·5% respectively and 37·9 g IIA/ha produced an overall reduction in mating of 71·5%, or 79·5% in released moth populations, over the same period. The proportion of virgin females present in disruption situations was significantly greater than in untreated populations and was density-independent for moth populations of up to 2 200/ha. The proportion of fertile eggs in disruption situations was correspondingly reduced to 30·2% from an average of 67·9% in control cycles. Reduction in sex pheromone trap catches is an unsatisfactory indicator of the extent to which males are prevented from inseminating females and considerably over-estimates the true degree of disruption. This is the first time that a naturally occurring inhibitor has been used successfully to disrupt mating in a field population of insects and it indicates the potential of the method for the control of high density pest populations in cotton. However, use of polyethylene dispensing mechanisms similar to those used in the field-cage disruption experiments would be unsuitable as a practical method of dispensing behaviour modifying chemicals and it is suggested that, for suitably controlled release of such chemicals, currently available microencapsulation technology offers the best prospects.

scholarly journals Population of Spodoptera exigua Hübner during On- and Off-Season of Shallot in Bantul Regency, Yogyakarta

2019 ◽  
Vol 23 (2) ◽  
pp. 261
Author(s):  
Fitri Ujiyani ◽  
Y. Andi Trisyono ◽  
Witjaksono Witjaksono ◽  
Suputa Suputa
Keyword(s):  
Spodoptera Exigua ◽  
Beet Armyworm ◽  
Pheromone Traps ◽  
Welsh Onion ◽  
Major Pest ◽  
Polyphagous Insect ◽  
Surrounding Areas ◽  
Lepidoptera Noctuidae ◽  
Planting Season

Beet armyworm (Spodoptera exigua Hübner) (Lepidoptera: Noctuidae) is known to be a polyphagous insect that infests many crops such as welsh onion, maize, tobacco, cotton, and others. In Indonesia, this species is a major pest of shallot. The study was aimed to monitor the population of beet armyworm in the shallot plantation in Bantul Regency, Yogyakarta. The monitoring was conducted using pheromone traps containing Z-9-tetra decanol 10 µg/rubber unit and Z-9-tetradecadienyl 90 µg/rubber unit. The pheromone was placed in the fields to trap males during on- and off-shallot plant season. The sites for placing the pheromone traps were selected in the farms where shallot was planted once and twice per year. The selected sites were with shallot and non-shallot in their surrounding areas. The result showed that males emerged both on- and off-shallot planting seasons in most of the areas. The average number of trapped males during the shallot season was < 5 males/trap/week. The number increased and reached the peak (7.33 males/trap/week) in June until July which was the off-shallot season. The population reduced to < 2 males/trap/week at the end of second shallot planting season until end of the year where the fields were mostly planted with rice. These findings indicate that the beet armyworm presents all year around with or without shallot in the fields. It suggests that management of this insect should be done not only during the shallot season but also the remaining seasons to obtain more effectiveness.

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