Ammar Jloud*(1) Nawal Kakeh(2) Nayef Alsalti(2) and Mounir Alnabhan(3)
(1).Directorate of Agriculture in Hama, Center for Rearing Natural Enemies, Hama, Syria.a.jloud85@gmail.com.
(2). Department of Plant Protection, Faculty of Agriculture, University of Aleppo, Aleppo, Syria.
(3).General Commission for Scientific Agricultural Research, Agricultural Scientific Research Center in Hama, Hama, Syria.
(*Corresponding author: Ammar Jloud. E-Mail: a.jloud85@gmail.com).
Received: 05/11/2019 Accepted: 19/12/2019
Abstract
This study was carried out at Hama Biological Control Center, during 2017 to study the effect of storage at low temperature on biology of Chrysoperla carnea. Predator stages were stored at low temperatures (6 and 10°C) under short day lengths (10:14 [L:D] h) for one month. The results showed significant effect to cold storage on survival rate for predator stages that decreased under long duration of storage. The lowest rates of survival were 3.5, 18.5% for eggs and 32.5, 38% for 1st larval instar and 37, 41% for 2nd larval instar, 40.5, 47.5% for 3rd larval instar and 31, 38.5% for pupa, when storing at (6, 10ºC) respectively for one month. Reproductive attributes of C. carnea were negatively influenced with cold storage. When storage for one month, female fecundity was 170.05, 261.05 eggs/female at (6, 10ºC) respectively, comparing with control (25±2ºC, 60±5 % RH and 16:8 D/L) 383.05 eggs.
Key words: Chrysoperla carnea, Cold storage, Biology.
Full paper in Arabic: PDF