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Temperature Effects on Development and Reproduction of Heterodera cajani on Pigeonpea

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Relation http://oar.icrisat.org/2066/
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2619495/
JA 1426
 
Title Temperature Effects on Development and Reproduction of
Heterodera cajani on Pigeonpea
 
Creator Singh, M
Sharma, S B
 
Subject Pigeonpea
 
Description Effects of constant and fluctuating temperature on development and reproduction of
Heterodera cajani were studied on pigeonpea cv. ICPL 87 in growth chambers at 10, 15, 20, 25, and
30 C and in a greenhouse fluctuating between 22.2 and 37.8 C. Nematode penetration was greatest
(P = 0.001) in roots at 25 C; there was no penetration at 10 C. The basal threshold temperature for
development was calculated to be 11 C. Completion of one H. cajani generation required 17, 28, 35,
and 66 days (323, 392, 315, and 264 degree-days) at 30, 25, 20, and 15 C, respectively, and 19 days
(356 degree-days) at a fluctuating temperature. Survival was greater at 20 and 25 C than at 15 and
30 C. The greatest (P = 0.05) number of females (17.9 females per root) were produced at 25 C,
compared with 13.2 at 20 C, 7.9 at 30 C, and 2.5 females at 15 C. Nematode reproduction was 1.6
to 7.1 times greater at 25 C than at other temperatures. Emergence of juveniles from egg sacs and
cysts was greater at 25 and 30 C than at 15 and 20 C. Equations were developed to predict nematode
development rate, cumulative juvenile emergence from egg sacs and cysts, and population increases
as influenced by temperature.
 
Publisher Society of Nematologists
 
Date 1994
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/2066/1/JouOfNem26_2_241-248_1994.pdf
Singh, M and Sharma, S B (1994) Temperature Effects on Development and Reproduction of Heterodera cajani on Pigeonpea. Journal of Nematology , 26 (2). pp. 241-248. ISSN 0022-300X