Population Susceptibility to Insecticides and the Development of Resistance in Bactrocera cucurbitae (Diptera: Tephritidae).

Excessive insecticide applications are commonly used to manage Bactrocera cucurbitae Coquillett in China. Resistance status, resistance development trends, and patterns of cross-resistance to insecticides in B. cucurbitae were investigated.

Effect of temperatures and cold storage on performance of Tetrastichus brontispae (Hymenoptera: Eulophidae), a parasitoid of Brontispa longissima (Coleptera: Chrysomelidae).

Laboratory studies were conducted to determine the effect of temperature and cold storage on the performance of Tetrastichus brontispae (Ferriere) (Hymenoptera: Eulophidae), one of the major endoparasitoids against coconut hispine beetle, Brontispa longissima (Gestro) (Coleptera: Chrysomelidae). The results revealed that T. brontispae could successfully parasitize host pupae under all seven tested temperatures, but no adult emergence was observed at 32°C.

Antifeedant activity of spin-labeled derivatives of deoxypodophyllotoxin against Brontispa longissima larvae.

To continue our search for natural product-based compounds for the control of Brontispa longissima larvae, eight spin-labeled podophyllotoxin derivatives (4a-h) and the intermediates 2 and 3 were tested for their insect antifeedant activity against third-instar larvae of B. longissima. Among all the tested compounds, 4a, 4c, 2 and 3 showed pronounced antifeedant activities with AFC50 values of 0.

Age-stage, two-sex life table of Brontispa longissima (Gestro) (Coleoptera: Hispidae) feeding on four palm plant varieties.

The life history of Brontispa longissima (Gestro) (Coleoptera: Hispidae), reared under laboratory conditions on leaves of coconut (Cocos nucifera L.), royal palm [Roystonea regia (Kunth) O.F.

Differential susceptibilities of Brontispa longissima (Coleoptera: Hispidae) to insecticides in Southeast Asia.

To present the susceptibility of Brontispa longissima (Gestro) (Coleoptera: Hispidae) to insecticides, 22 populations were collected in Southeast Asia from 2007 to 2010. Moreover, the laboratory susceptible strain was maintained. The results demonstrated that the lethal concentration50 value of the susceptible strain to avermectin, beta-cypermethrin, and acetamiprid was 0.

[Effects of temperature on Brontispa longissima population growth].

The study on the development, survival and reproduction of Brontispa longissima at 5 different temperature (16, 20, 24, 28, 32 degrees C) showed that the threshold temperature and effective accumulative temperature for the whole generations of Brontispa longissima were 11.08 degrees C and 966.22 degrees C, respectively, and 4-5 generations could occur in a year in Danzhou, Hainan Province.