Stop gap measures for locust control
1999
Rejesus, R.S. | Obra, J.B. | Reyes, O.M. (Philippines Univ., Los Banos, College, Laguna (Philippines))
Studies revealed that neem oil is a potent phagorepellent. Neem oil is slightly toxic but extremely potent at low concentration of 50 ppm and 100 ppm when sprayed on host plants or directly on locust. Other than slight nibbling, treated locust refused to feed up to five days, resulting in death apparently due to starvation. In a small-scale, field-simulated trials, third instar and adult locust did not feed on treated plants for 72 hours and died of starvation. More active bait formulations using cheap locally available ingredients were developed to control swarming hoppers in or near breeding grounds to prevent massive population growth. The practical use of rice hull or rice bran + molasses fortified with carbaryl or diazinon bait was established in suppressing hopper populations. Preferred oviposition soil substrates and moisture content were proven to be important parameters in monitoring and surveillance of breeding grounds. Reflubenzuron and bupfropezin, commercial pesticides mimicking hormonal action or the so-called insect growth regulators (IGRs) were tested for toxicity and disruption of normal development process. Both IGRs were not toxic to third and fourth instar hoppers. Neither did it cause any deformities on the treated locust
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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