PARAMETER KEHIDUPAN DAN DEMOGRAFI KEPIK, Diconocoris hewetti (Dist.) (HEMIPTERA: TINGIDAE) PADA DUA VARIETAS LADA

I WAYAN LABA, AUNU RAUF, UTOMO KARTOSUWONDO, M. SOEHARDJAN M. SOEHARDJAN

Abstract


ABSTRAK
Kepik renda lada (KRL), Diconocoris hewetti (Dist.) (Hemiptera:
Tingidae) adalah salah satu hama pada pertanaman lada di Indonesia.
Penelitian bertujuan untuk membandingkan berbagai parameter kehidupan
dan demografi KRL pada dua varietas lada. Pengaruh varietas lada
terhadap parameter kehidupan dan demografi KRL diteliti di rumah kasa
dan pertanaman lada di Pulau Bangka, sejak Oktober 2003 hingga Februari
2004. Penelitian mencakup pengaruh varietas Chunuk dan LDL terhadap
masa perkembangan telur dan nimfa, lama hidup imago jantan dan betina,
serta keperidian. Selain itu juga diteliti pengaruh fase bunga, pucuk daun,
dan buah muda terhadap lama hidup imago. Pengaruh varietas terhadap
berbagai parameter demografi KRL dipelajari dengan memelihara kepik
dari sejak telur hingga imago yang muncul meletakkan telur kembali.
Hasil penelitian menunjukkan bahwa perbedaan varietas mempengaruhi
berbagai parameter kehidupan KRL. Lama perkembangan nimfa 17,3 dan
13,0 hari, lama hidup imago jantan 10,2 dan 18,8 hari, lama hidup imago
betina 13,6 dan 16,9 hari, keperidian 13,9 dan 24,5 butir, berturut-turut
pada varietas Chunuk dan LDL. Imago KRL hidup lebih lama pada bunga
fase-3 dibandingkan pada bunga fase-1 atau-2. Laju pertambahan intrinsik
(r) 0,0741 dan 0,0827; laju reproduksi bersih (Ro) 6,98 dan 8,52, masa
generasi (T) 26,21 dan 25,91; laju pertambahan terbatas (λ) 1,0769 dan
1,0862 berturut-turut pada varietas Chunuk dan LDL. Secara keseluruhan,
varietas LDL lebih mendukung kehidupan dan perkembangan populasi D.
hewetti. Jika tidak tersedia bunga lada KRL mampu bertahan hidup dengan
mengisap pucuk daun dan buah muda. Lama hidup imago 12,1 hari dan
23,5 hari pada buah muda. Implikasi dari hasil penelitian ini adalah
informasi dasar dalam penelitian untuk pengendalian KRL.
Kata kunci: Lada, Piper nigrum L., hama, kepik renda lada, Diconocoris
hewetti, parameter kehidupan, demografi, Propinsi Bangka
Belitung
ABSTRACT
Life parameters and demographic of bug peper lace
Diconocoris hewetti (Dist.) (Hemiptera: Tingidae) on two
pepper varieties
Pepper lace bug (PLB), Diconocoris hewetti (Dist.) (Hemiptera:
Tingidae), is one of the insect pests attacking pepper in Indonesia.
Research was conducted with the objective to compare various life history
and demographic parameters of PLB on two pepper varieties. The effect
of two pepper varieties on various life parameters and demographic of
PLB was conducted in green house and farmer field on Bangka Island,
since October 2003 to February 2004. The experiment covered the effect
of LDL and Chunuk varieties on eggs and nymphal development, male
and female adults longivity and fecundity. Besides the effect of
development stage on inflorescence, shoots and young berries to adults
longivity were observed. The effect of varieties to demographic parameters
of PLB was studied by rearing the bugs since egg to adult laid eggs. The
result revealed that difference variety was influenced life history and
demographic parameters of PLB. Nymphal development time of PLB were
17.3 and 13.0 days, male adult longivity 10.2 and 18.8 days, female adult
longivity 13.6 and 16.9 days, fecundity 13.9 and 24.5 eggs per female,
respectively on Chunuk and LDL. The life history of PLB adult was longer
on stage-3 inflorescences than stage-1 or stage-2. The intrinsic rates of
increase (r) were 0.0741 and 0.0827, net reproductive rate (Ro) 6.98 and
8.52, mean generation time (T) 26.21 and 25.91 days, finite rate of
increase  (λ)  1.0769  and  1.0862  on  Chunuk  and  LDL
respectively.Generally, variety LDL was much better food source for the
development of D. hewetti. If there were no inflorescences available, the
PLB was able to survive by feeding on shoots or young berries. Adult
longivity was 12.1 days on shoots and 23.5 days on young berries. The
implication of this research is as the basic information in the next research
for PLB control.
Key words : Pepper, Piper nigrum L., pest, lace bug, Diconocoris hewetti,
life parameters, demographic, Bangka Belitung Province

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DOI: http://dx.doi.org/10.21082/littri.v12n3.2006.%25p

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