Comparison of the Effects of Brown Planthopper, Nilaparvata lugens (Stål) (Homoptera:Delphacidae), and Rice Leaffolder, Cnaphalocrocis medinalis Guenee (Lepidoptera: Pyralidae), Infestations and Simulated Damage on Nutrient Uptake by the Roots of Rice Plants

AbstractAdults of Cnaphalocrocis medinalis (Gn.), a widely distributed pest of rice, were found to require an exogenous source of sugar, life-span and fecundity being greatly increased in the laboratory when sugar was available. Their sources of sugar in the field are not known, but evidence is presented which shows that in the laboratory they can utilise the honeydew produced by Nilaparvata lugens (Stål), a common pest of rice.

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Impact of Day Intervals on Sequential Infestations of the Rice Leaffolder Cnaphalocrocis medinalis (Guenée) (Lepidoptera: Pyralidae) and the White-Backed Rice Planthopper Sogatella furcifera (Horváth) on Rice Grain Damage

International Journal of Insect Science ◽

10.4137/ijis.s13536 ◽

2014 ◽

Vol 6 ◽

pp. IJIS.S13536 ◽

Cited By ~ 1

Author(s):

Li-Ben Jiang ◽

Jia Cheng ◽

Zhan-Fei Zhu ◽

Lin-Quan Ge ◽

Guo-Qing Yang ◽

...

Keyword(s):

Control Strategies ◽

Cnaphalocrocis Medinalis ◽

Rice Grain ◽

Pest Species ◽

Sogatella Furcifera ◽

Biochemical Tests ◽

Rice Plants ◽

Grain Damage ◽

Lepidoptera Pyralidae ◽

Rice Leaffolder

The present study illustrates that different day intervals (DIs) between the sequential infestations of two pest species, the rice leaffolder (RLF) Cnaphalocrocis medinalis Guenée (Lepidoptera: Pyralidae) and the white-backed rice planthopper (WBPH) Sogatella furcifera Horváth (Hemiptera: Delphacidae), have a significant impact on the rice yield loss rate (YLR) and on the carbohydrate contents of rice plants. For WBPH release after RLF release (WRARR), the YLR decreased with the increasing DIs, and the YLR at the 24 DI was significantly lower compared to that at the 6 and 12 DIs and had a minimum value for a simultaneous infestation of the two pest species (SITS). In contrast, for RLF release after WBPH release (RRAWR), the YLR at the 24 DI had a maximum value and was significantly higher compared to that at the 6 and 12 DIs and the SITS. These findings indicate that damaged rice plants gradually recover, with an increase in the DI for WRARR. The above results were demonstrated by biochemical tests. Therefore, the sequential infestation of the two pest species and their DIs should be considered for integrated pest management (IPM) and control strategies for rice pests.

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Entomocidal Activity of Bacillus Thuringiensis Transgenic Rice Plants Against Rice Leaffolder, Cnaphalocrocis Medinalis (Lepidoptera: Pyralidae).

Pakistan Journal of Biological Sciences ◽

10.3923/pjbs.1999.1472.1477 ◽

1999 ◽

Vol 2 (4) ◽

pp. 1472-1477 ◽

Cited By ~ 2

Author(s):

Rizwana Anwar . ◽

Shahid Karim . ◽

S. Riazuddin .

Keyword(s):

Bacillus Thuringiensis ◽

Transgenic Rice ◽

Cnaphalocrocis Medinalis ◽

Rice Plants ◽

Transgenic Rice Plants ◽

Lepidoptera Pyralidae ◽

Rice Leaffolder

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Ketahanan padi (Oryza sativa L.) varietas IPB 3S terhadap wereng batang cokelat (Nilaparvata lugens (Stål) (Hemiptera: Delphacidae)

Jurnal Entomologi Indonesia ◽

10.5994/jei.17.2.97 ◽

2020 ◽

Vol 17 (2) ◽

pp. 97

Author(s):

Andi Nurdaaniyah ◽

Dadang Dadang ◽

I Wayan Winasa

Keyword(s):

Sex Ratio ◽

Insect Pests ◽

Oryza Sativa L ◽

Feeding Activity ◽

Brown Planthopper ◽

Nilaparvata Lugens ◽

Population Increase ◽

Rice Varieties ◽

High Loss ◽

Rice Plants

Brown planthopper (Nilaparvata lugens (Stål)) is one of the major rice insect pests that is known to cause high loss of rice production. One of the strategies to control this pest is by using resistant rice varieties. The aim of this research was to study the resistance of IPB 3S variety to BPH by measuring BPH fecundity, sex ratio, feeding activity as well as population increase compared to Ciherang variety against brown planthopper (N. lugens). Fecundity test used a pair of BPH adult infested on 21 days after planting (DAP) of rice plants. Eggs laid in rice stalks and the rest of eggs in the ovary were counted. In order to know the change of sex ratio, a pair of BPH adults was infested on 30 DAP rice plants and allowed to lay eggs. The calculation of sex ratio was conducted at adult stage of BPH by segregation between male and female adults. Feeding activity of BPH was evaluated using ninhydrin and analyzed qualitatively using spectrophotometer. Ten fourth instar nymphs of BPH was infested on 30 DAP old of rice seedlings. Honeydew secreted by BPH was collected to filter paper sprayed with ninhydrin. Population increased test was conducted by infesting five pairs of BPH adults on 35 DAP old rice plants. Observations was conducted on nymph and adult stages. Each test was replicated 10 times. In general, IPB 3S is slightly resistant to BPH, compared to Ciherang variety. The feeding activity of BPH is higher in Ciherang compared to IPB3S. However, the fecundity and population increased of BPH in Ciherang is similar to IPB3S.

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